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5db6a4b156
autoconf/acspecific.m4
Akim Demaille 5db6a4b156 * acgeneral.m4: Simplify all the unjustified `[\$]foo' into 
`\$foo', the quotes are needed only for `\$[1]', `\$[@]' etc.
Prefer `$$1' to `[$]$1', `$foo' to `[$]foo', `$[1]' to `[$]1' etc.
* aclang.m4: Likewise.
* acspecific.m4: Likewise.
2000-05-19 13:07:13 +00:00

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# This file is part of Autoconf. -*- Autoconf -*-
# Macros that test for specific features.
# Copyright (C) 1992, 93, 94, 95, 96, 98, 99, 2000
# Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
#
# As a special exception, the Free Software Foundation gives unlimited
# permission to copy, distribute and modify the configure scripts that
# are the output of Autoconf. You need not follow the terms of the GNU
# General Public License when using or distributing such scripts, even
# though portions of the text of Autoconf appear in them. The GNU
# General Public License (GPL) does govern all other use of the material
# that constitutes the Autoconf program.
#
# Certain portions of the Autoconf source text are designed to be copied
# (in certain cases, depending on the input) into the output of
# Autoconf. We call these the "data" portions. The rest of the Autoconf
# source text consists of comments plus executable code that decides which
# of the data portions to output in any given case. We call these
# comments and executable code the "non-data" portions. Autoconf never
# copies any of the non-data portions into its output.
#
# This special exception to the GPL applies to versions of Autoconf
# released by the Free Software Foundation. When you make and
# distribute a modified version of Autoconf, you may extend this special
# exception to the GPL to apply to your modified version as well, *unless*
# your modified version has the potential to copy into its output some
# of the text that was the non-data portion of the version that you started
# with. (In other words, unless your change moves or copies text from
# the non-data portions to the data portions.) If your modification has
# such potential, you must delete any notice of this special exception
# to the GPL from your modified version.
#
# Written by David MacKenzie, with help from
# Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
# Roland McGrath, Noah Friedman, david d zuhn, and many others.
## --------------------- ##
## Checks for programs. ##
## --------------------- ##
# _AC_PROG_ECHO
# -------------
# Check whether to use -n, \c, or newline-tab to separate
# checking messages from result messages.
# Don't try to cache, since the results of this macro are needed to
# display the checking message. In addition, caching something used once
# has little interest.
# Idea borrowed from dist 3.0.
AC_DEFUN(_AC_PROG_ECHO,
[if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
# Stardent Vistra SVR4 grep lacks -e, says Kaveh R. Ghazi.
if (echo -n testing; echo 1,2,3) | sed s/-n/xn/ | grep xn >/dev/null; then
ECHO_N= ECHO_C='
' ECHO_T=' '
else
ECHO_N=-n ECHO_C= ECHO_T=
fi
else
ECHO_N= ECHO_C='\c' ECHO_T=
fi
AC_SUBST(ECHO_C)dnl
AC_SUBST(ECHO_N)dnl
AC_SUBST(ECHO_T)dnl
])# _AC_PROG_ECHO
# AC_PROG_GNU_M4
# --------------
# Check for GNU m4, at least 1.3 (supports frozen files).
AC_DEFUN(AC_PROG_GNU_M4,
[AC_PATH_PROGS(M4, gm4 gnum4 m4, m4)
AC_CACHE_CHECK(whether m4 supports frozen files, ac_cv_prog_gnu_m4,
[ac_cv_prog_gnu_m4=no
if test x"$M4" != x; then
case `$M4 --help < /dev/null 2>&1` in
*reload-state*) ac_cv_prog_gnu_m4=yes ;;
esac
fi])])
# AC_PROG_MAKE_SET
# ----------------
# Define SET_MAKE to set ${MAKE} if make doesn't.
AC_DEFUN(AC_PROG_MAKE_SET,
[AC_MSG_CHECKING(whether ${MAKE-make} sets \${MAKE})
set dummy ${MAKE-make}; ac_make=`echo "$[2]" | sed 'y%./+-%__p_%'`
AC_CACHE_VAL(ac_cv_prog_make_${ac_make}_set,
[cat >conftestmake <<\EOF
all:
@echo 'ac_maketemp="${MAKE}"'
EOF
# GNU make sometimes prints "make[1]: Entering...", which would confuse us.
eval `${MAKE-make} -f conftestmake 2>/dev/null | grep temp=`
if test -n "$ac_maketemp"; then
eval ac_cv_prog_make_${ac_make}_set=yes
else
eval ac_cv_prog_make_${ac_make}_set=no
fi
rm -f conftestmake])dnl
if eval "test \"`echo '$ac_cv_prog_make_'${ac_make}_set`\" = yes"; then
AC_MSG_RESULT(yes)
SET_MAKE=
else
AC_MSG_RESULT(no)
SET_MAKE="MAKE=${MAKE-make}"
fi
AC_SUBST([SET_MAKE])dnl
])# AC_PROG_MAKE_SET
AC_DEFUN(AC_PROG_RANLIB,
[AC_CHECK_PROG(RANLIB, ranlib, ranlib, :)])
# Check for mawk first since it's generally faster.
AC_DEFUN(AC_PROG_AWK,
[AC_CHECK_PROGS(AWK, mawk gawk nawk awk, )])
# AC_PROG_YACC
# ------------
AC_DEFUN(AC_PROG_YACC,
[AC_CHECK_PROGS(YACC, 'bison -y' byacc, yacc)])
# AC_PROG_LEX
# -----------
# Look for flex or lex. Set its associated library to LEXLIB.
# Check if lex declares yytext as a char * by default, not a char[].
AC_DEFUN([AC_PROG_LEX],
[AH_CHECK_LIB(fl)dnl
AH_CHECK_LIB(l)dnl
AC_CHECK_PROG(LEX, flex, flex, lex)
if test -z "$LEXLIB"
then
case "$LEX" in
flex*) ac_lib=fl ;;
*) ac_lib=l ;;
esac
AC_CHECK_LIB($ac_lib, yywrap, LEXLIB="-l$ac_lib")
fi
AC_SUBST(LEXLIB)
_AC_DECL_YYTEXT])
# _AC_DECL_YYTEXT
# ---------------
# Check if lex declares yytext as a char * by default, not a char[].
AC_DEFUN([_AC_DECL_YYTEXT],
[AC_REQUIRE_CPP()dnl
AC_CACHE_CHECK(lex output file root, ac_cv_prog_lex_root,
[# The minimal lex program is just a single line: %%. But some broken lexes
# (Solaris, I think it was) want two %% lines, so accommodate them.
echo '%%
%%' | $LEX
if test -f lex.yy.c; then
ac_cv_prog_lex_root=lex.yy
elif test -f lexyy.c; then
ac_cv_prog_lex_root=lexyy
else
AC_MSG_ERROR(cannot find output from $LEX; giving up)
fi])
LEX_OUTPUT_ROOT=$ac_cv_prog_lex_root
AC_SUBST(LEX_OUTPUT_ROOT)dnl
AC_CACHE_CHECK(whether yytext is a pointer, ac_cv_prog_lex_yytext_pointer,
[# POSIX says lex can declare yytext either as a pointer or an array; the
# default is implementation-dependent. Figure out which it is, since
# not all implementations provide the %pointer and %array declarations.
ac_cv_prog_lex_yytext_pointer=no
echo 'extern char *yytext;' >>$LEX_OUTPUT_ROOT.c
ac_save_LIBS=$LIBS
LIBS="$LIBS $LEXLIB"
AC_LINK_IFELSE([`cat $LEX_OUTPUT_ROOT.c`], ac_cv_prog_lex_yytext_pointer=yes)
LIBS=$ac_save_LIBS
rm -f "${LEX_OUTPUT_ROOT}.c"
])
dnl
if test $ac_cv_prog_lex_yytext_pointer = yes; then
AC_DEFINE(YYTEXT_POINTER, 1,
[Define if `lex' declares `yytext' as a `char *' by default,
not a `char[]'.])
fi
])# _AC_DECL_YYTEXT
# Require AC_PROG_LEX in case some people were just calling this macro.
AU_DEFUN([AC_DECL_YYTEXT],
[AC_REQUIRE([AC_PROG_LEX])])
# AC_PROG_INSTALL
# ---------------
AC_DEFUN(AC_PROG_INSTALL,
[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
# Find a good install program. We prefer a C program (faster),
# so one script is as good as another. But avoid the broken or
# incompatible versions:
# SysV /etc/install, /usr/sbin/install
# SunOS /usr/etc/install
# IRIX /sbin/install
# AIX /bin/install
# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
# AFS /usr/afsws/bin/install, which mishandles nonexistent args
# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
# ./install, which can be erroneously created by make from ./install.sh.
AC_MSG_CHECKING(for a BSD compatible install)
if test -z "$INSTALL"; then
AC_CACHE_VAL(ac_cv_path_install,
[ ac_save_IFS=$IFS; IFS=':'
for ac_dir in $PATH; do
# Account for people who put trailing slashes in PATH elements.
case "$ac_dir/" in
/|./|.//|/etc/*|/usr/sbin/*|/usr/etc/*|/sbin/*|/usr/afsws/bin/*|/usr/ucb/*) ;;
*)
# OSF1 and SCO ODT 3.0 have their own names for install.
# Don't use installbsd from OSF since it installs stuff as root
# by default.
for ac_prog in ginstall scoinst install; do
if test -f $ac_dir/$ac_prog; then
if test $ac_prog = install &&
grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then
# AIX install. It has an incompatible calling convention.
:
elif test $ac_prog = install &&
grep pwplus $ac_dir/$ac_prog >/dev/null 2>&1; then
# program-specific install script used by HP pwplus--don't use.
:
else
ac_cv_path_install="$ac_dir/$ac_prog -c"
break 2
fi
fi
done
;;
esac
done
IFS=$ac_save_IFS
])dnl
if test "${ac_cv_path_install+set}" = set; then
INSTALL=$ac_cv_path_install
else
# As a last resort, use the slow shell script. We don't cache a
# path for INSTALL within a source directory, because that will
# break other packages using the cache if that directory is
# removed, or if the path is relative.
INSTALL=$ac_install_sh
fi
fi
dnl We do special magic for INSTALL instead of AC_SUBST, to get
dnl relative paths right.
AC_MSG_RESULT($INSTALL)
# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
# It thinks the first close brace ends the variable substitution.
test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
AC_SUBST(INSTALL_PROGRAM)dnl
test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
AC_SUBST(INSTALL_SCRIPT)dnl
test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
AC_SUBST(INSTALL_DATA)dnl
])# AC_PROG_INSTALL
# AC_PROG_LN_S
# ------------
AC_DEFUN(AC_PROG_LN_S,
[AC_MSG_CHECKING(whether ln -s works)
AC_CACHE_VAL(ac_cv_prog_LN_S,
[rm -f conftestdata
if ln -s X conftestdata 2>/dev/null
then
rm -f conftestdata
ac_cv_prog_LN_S="ln -s"
else
ac_cv_prog_LN_S=ln
fi])dnl
LN_S=$ac_cv_prog_LN_S
if test "$ac_cv_prog_LN_S" = "ln -s"; then
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
AC_SUBST(LN_S)dnl
])# AC_PROG_LN_S
AC_DEFUNCT(AC_RSH, [; replace it with equivalent code])
## ------------------------- ##
## Checks for declarations. ##
## ------------------------- ##
# AC_DECL_SYS_SIGLIST
# -------------------
AC_DEFUN(AC_DECL_SYS_SIGLIST,
[AC_CACHE_CHECK([for sys_siglist declaration in signal.h or unistd.h],
ac_cv_decl_sys_siglist,
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([#include <sys/types.h>
#include <signal.h>
/* NetBSD declares sys_siglist in unistd.h. */
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
], [char *msg = *(sys_siglist + 1);])],
[ac_cv_decl_sys_siglist=yes],
[ac_cv_decl_sys_siglist=no])])
if test $ac_cv_decl_sys_siglist = yes; then
AC_DEFINE(SYS_SIGLIST_DECLARED, 1,
[Define if `sys_siglist' is declared by <signal.h> or <unistd.h>.])
fi
])# AC_DECL_SYS_SIGLIST
## ------------------------- ##
## Checks for header files. ##
## ------------------------- ##
# _AC_CHECK_HEADER_DIRENT(HEADER-FILE,
# [ACTION-IF-FOUND], [ACTION-IF-NOT_FOUND])
# -----------------------------------------------------------------
# Like AC_CHECK_HEADER, except also make sure that HEADER-FILE
# defines the type `DIR'. dirent.h on NextStep 3.2 doesn't.
define([_AC_CHECK_HEADER_DIRENT],
[AC_VAR_PUSHDEF([ac_Header], [ac_cv_header_dirent_$1])dnl
AC_CACHE_CHECK([for $1 that defines DIR], ac_Header,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/types.h>
#include <$1>
],
[DIR *dirp = 0;])],
[AC_VAR_SET(ac_Header, yes)],
[AC_VAR_SET(ac_Header, no)])])
AC_SHELL_IFELSE([test AC_VAR_GET(ac_Header) = yes],
[$2], [$3])dnl
AC_VAR_POPDEF([ac_Header])dnl
])# _AC_CHECK_HEADER_DIRENT
# AH_CHECK_HEADERS_DIRENT(HEADERS...)
# -----------------------------------
define([AH_CHECK_HEADERS_DIRENT],
[AC_FOREACH([AC_Header], [$1],
[AH_TEMPLATE(AC_TR_CPP(HAVE_[]AC_Header),
[Define if you have the <]AC_Header[> header file, and
it defines `DIR'.])])])
# AC_HEADER_DIRENT
# ----------------
AC_DEFUN(AC_HEADER_DIRENT,
[AH_CHECK_HEADERS_DIRENT(dirent.h sys/ndir.h sys/dir.h ndir.h)
ac_header_dirent=no
for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h; do
_AC_CHECK_HEADER_DIRENT($ac_hdr,
[AC_DEFINE_UNQUOTED(AC_TR_CPP(HAVE_$ac_hdr), 1)
ac_header_dirent=$ac_hdr; break])
done
# Two versions of opendir et al. are in -ldir and -lx on SCO Xenix.
if test $ac_header_dirent = dirent.h; then
AC_CHECK_LIB(dir, opendir, LIBS="$LIBS -ldir")
else
AC_CHECK_LIB(x, opendir, LIBS="$LIBS -lx")
fi
])# AC_HEADER_DIRENT
# AC_HEADER_MAJOR
# ---------------
AC_DEFUN(AC_HEADER_MAJOR,
[AC_CACHE_CHECK(whether sys/types.h defines makedev,
ac_cv_header_sys_types_h_makedev,
[AC_TRY_LINK([#include <sys/types.h>
], [return makedev(0, 0);],
ac_cv_header_sys_types_h_makedev=yes, ac_cv_header_sys_types_h_makedev=no)
])
if test $ac_cv_header_sys_types_h_makedev = no; then
AC_CHECK_HEADER(sys/mkdev.h,
[AC_DEFINE(MAJOR_IN_MKDEV, 1,
[Define if `major', `minor', and `makedev' are
declared in <mkdev.h>.])])
if test $ac_cv_header_sys_mkdev_h = no; then
AC_CHECK_HEADER(sys/sysmacros.h,
[AC_DEFINE(MAJOR_IN_SYSMACROS, 1,
[Define if `major', `minor', and `makedev' are
declared in <sysmacros.h>.])])
fi
fi
])# AC_HEADER_MAJOR
# AC_HEADER_STAT
# --------------
# FIXME: Shouldn't this be named AC_HEADER_SYS_STAT?
AC_DEFUN(AC_HEADER_STAT,
[AC_CACHE_CHECK(whether stat file-mode macros are broken,
ac_cv_header_stat_broken,
[AC_EGREP_CPP([You lose], [#include <sys/types.h>
#include <sys/stat.h>
#if defined(S_ISBLK) && defined(S_IFDIR)
# if S_ISBLK (S_IFDIR)
You lose.
# endif
#endif
#if defined(S_ISBLK) && defined(S_IFCHR)
# if S_ISBLK (S_IFCHR)
You lose.
# endif
#endif
#if defined(S_ISLNK) && defined(S_IFREG)
# if S_ISLNK (S_IFREG)
You lose.
# endif
#endif
#if defined(S_ISSOCK) && defined(S_IFREG)
# if S_ISSOCK (S_IFREG)
You lose.
# endif
#endif
], ac_cv_header_stat_broken=yes, ac_cv_header_stat_broken=no)])
if test $ac_cv_header_stat_broken = yes; then
AC_DEFINE(STAT_MACROS_BROKEN, 1,
[Define if the `S_IS*' macros in <sys/stat.h> do not
work properly.])
fi
])# AC_HEADER_STAT
# AC_HEADER_STDC
# --------------
AC_DEFUN(AC_HEADER_STDC,
[AC_REQUIRE_CPP()dnl
AC_CACHE_CHECK(for ANSI C header files, ac_cv_header_stdc,
[AC_TRY_CPP([#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <float.h>
], ac_cv_header_stdc=yes, ac_cv_header_stdc=no)
if test $ac_cv_header_stdc = yes; then
# SunOS 4.x string.h does not declare mem*, contrary to ANSI.
AC_EGREP_HEADER(memchr, string.h, , ac_cv_header_stdc=no)
fi
if test $ac_cv_header_stdc = yes; then
# ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
AC_EGREP_HEADER(free, stdlib.h, , ac_cv_header_stdc=no)
fi
if test $ac_cv_header_stdc = yes; then
# /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
AC_TRY_RUN(
[#include <ctype.h>
#if ((' ' & 0x0FF) == 0x020)
# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
#else
# define ISLOWER(c) (('a' <= (c) && (c) <= 'i') \
|| ('j' <= (c) && (c) <= 'r') \
|| ('s' <= (c) && (c) <= 'z'))
# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
#endif
#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
int
main ()
{
int i;
for (i = 0; i < 256; i++)
if (XOR (islower (i), ISLOWER (i))
|| toupper (i) != TOUPPER (i))
exit(2);
exit (0);
}], , ac_cv_header_stdc=no, :)
fi])
if test $ac_cv_header_stdc = yes; then
AC_DEFINE(STDC_HEADERS, 1, [Define if you have the ANSI C header files.])
fi
])# AC_HEADER_STDC
# AC_HEADER_SYS_WAIT
# ------------------
AC_DEFUN(AC_HEADER_SYS_WAIT,
[AC_CACHE_CHECK([for sys/wait.h that is POSIX.1 compatible],
ac_cv_header_sys_wait_h,
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([#include <sys/types.h>
#include <sys/wait.h>
#ifndef WEXITSTATUS
# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
#endif
#ifndef WIFEXITED
# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
#endif
],
[ int s;
wait (&s);
s = WIFEXITED (s) ? WEXITSTATUS (s) : 1;])],
[ac_cv_header_sys_wait_h=yes],
[ac_cv_header_sys_wait_h=no])])
if test $ac_cv_header_sys_wait_h = yes; then
AC_DEFINE(HAVE_SYS_WAIT_H, 1,
[Define if you have <sys/wait.h> that is POSIX.1 compatible.])
fi
])# AC_HEADER_SYS_WAIT
# AC_HEADER_TIME
# --------------
AC_DEFUN(AC_HEADER_TIME,
[AC_CACHE_CHECK([whether time.h and sys/time.h may both be included],
ac_cv_header_time,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/types.h>
#include <sys/time.h>
#include <time.h>
],
[struct tm *tp;])],
[ac_cv_header_time=yes],
[ac_cv_header_time=no])])
if test $ac_cv_header_time = yes; then
AC_DEFINE(TIME_WITH_SYS_TIME, 1,
[Define if you can safely include both <sys/time.h> and <time.h>.])
fi
])# AC_HEADER_TIME
# A few hasbeen'd macros.
AC_DEFUNCT(AC_UNISTD_H, [; instead use AC_CHECK_HEADERS(unistd.h)])
AC_DEFUNCT(AC_USG,
[; instead use AC_CHECK_HEADERS(string.h) and HAVE_STRING_H])
# If memchr and the like aren't declared in <string.h>, include <memory.h>.
# To avoid problems, don't check for gcc2 built-ins.
AC_DEFUNCT(AC_MEMORY_H,
[; instead use AC_CHECK_HEADERS(memory.h) and HAVE_MEMORY_H])
# Like calling `AC_HEADER_DIRENT' and `AC_FUNC_CLOSEDIR_VOID', but
# defines a different set of C preprocessor macros to indicate which
# header file is found. This macro and the names it defines are
# considered obsolete.
AC_DEFUNCT(AC_DIR_HEADER,
[; instead use AC_HEADER_DIRENT])
## --------------------- ##
## Checks for typedefs. ##
## --------------------- ##
# AC_TYPE_GETGROUPS
# -----------------
AC_DEFUN(AC_TYPE_GETGROUPS,
[AC_REQUIRE([AC_TYPE_UID_T])dnl
AC_CACHE_CHECK(type of array argument to getgroups, ac_cv_type_getgroups,
[AC_TRY_RUN(
[/* Thanks to Mike Rendell for this test. */
#include <sys/types.h>
#define NGID 256
#undef MAX
#define MAX(x, y) ((x) > (y) ? (x) : (y))
int
main ()
{
gid_t gidset[NGID];
int i, n;
union { gid_t gval; long lval; } val;
val.lval = -1;
for (i = 0; i < NGID; i++)
gidset[i] = val.gval;
n = getgroups (sizeof (gidset) / MAX (sizeof (int), sizeof (gid_t)) - 1,
gidset);
/* Exit non-zero if getgroups seems to require an array of ints. This
happens when gid_t is short but getgroups modifies an array of ints. */
exit ((n > 0 && gidset[n] != val.gval) ? 1 : 0);
}],
ac_cv_type_getgroups=gid_t, ac_cv_type_getgroups=int,
ac_cv_type_getgroups=cross)
if test $ac_cv_type_getgroups = cross; then
dnl When we can't run the test program (we are cross compiling), presume
dnl that <unistd.h> has either an accurate prototype for getgroups or none.
dnl Old systems without prototypes probably use int.
AC_EGREP_HEADER([getgroups.*int.*gid_t], unistd.h,
ac_cv_type_getgroups=gid_t, ac_cv_type_getgroups=int)
fi])
AC_DEFINE_UNQUOTED(GETGROUPS_T, $ac_cv_type_getgroups,
[Define to the type of elements in the array set by
`getgroups'. Usually this is either `int' or `gid_t'.])
])# AC_TYPE_GETGROUPS
# AC_TYPE_UID_T
# -------------
# FIXME: Rewrite using AC_CHECK_TYPE.
AC_DEFUN(AC_TYPE_UID_T,
[AC_CACHE_CHECK(for uid_t in sys/types.h, ac_cv_type_uid_t,
[AC_EGREP_HEADER(uid_t, sys/types.h,
ac_cv_type_uid_t=yes, ac_cv_type_uid_t=no)])
if test $ac_cv_type_uid_t = no; then
AC_DEFINE(uid_t, int, [Define to `int' if <sys/types.h> doesn't define.])
AC_DEFINE(gid_t, int, [Define to `int' if <sys/types.h> doesn't define.])
fi
])
# FIXME: AU_DEFUN these guys?
AC_DEFUN(AC_TYPE_SIZE_T,
[AC_CHECK_TYPE(size_t, unsigned)])
AC_DEFUN(AC_TYPE_PID_T,
[AC_CHECK_TYPE(pid_t, int)])
AC_DEFUN(AC_TYPE_OFF_T,
[AC_CHECK_TYPE(off_t, long)])
AC_DEFUN(AC_TYPE_MODE_T,
[AC_CHECK_TYPE(mode_t, int)])
AC_DEFUNCT(AC_INT_16_BITS, [; instead use AC_CHECK_SIZEOF(int)])
AC_DEFUNCT(AC_LONG_64_BITS, [; instead use AC_CHECK_SIZEOF(long)])
# AC_TYPE_SIGNAL
# --------------
# Note that identifiers starting with SIG are reserved by ANSI C.
AC_DEFUN(AC_TYPE_SIGNAL,
[AC_CACHE_CHECK([return type of signal handlers], ac_cv_type_signal,
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([#include <sys/types.h>
#include <signal.h>
#ifdef signal
# undef signal
#endif
#ifdef __cplusplus
extern "C" void (*signal (int, void (*)(int)))(int);
#else
void (*signal ()) ();
#endif
],
[int i;])],
[ac_cv_type_signal=void],
[ac_cv_type_signal=int])])
AC_DEFINE_UNQUOTED(RETSIGTYPE, $ac_cv_type_signal,
[Define as the return type of signal handlers
(`int' or `void').])
])
## ---------------------- ##
## Checks for functions. ##
## ---------------------- ##
# AC_FUNC_ALLOCA
# --------------
AC_DEFUN(AC_FUNC_ALLOCA,
[AH_VERBATIM([STACK_DIRECTION],
[/* If using the C implementation of alloca, define if you know the
direction of stack growth for your system; otherwise it will be
automatically deduced at run-time.
STACK_DIRECTION > 0 => grows toward higher addresses
STACK_DIRECTION < 0 => grows toward lower addresses
STACK_DIRECTION = 0 => direction of growth unknown */
@%:@undef STACK_DIRECTION])dnl
AC_REQUIRE_CPP()dnl Set CPP; we run AC_EGREP_CPP conditionally.
# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
# for constant arguments. Useless!
AC_CACHE_CHECK([for working alloca.h], ac_cv_working_alloca_h,
[AC_TRY_LINK([#include <alloca.h>],
[char *p = (char *) alloca (2 * sizeof (int));],
ac_cv_working_alloca_h=yes, ac_cv_working_alloca_h=no)])
if test $ac_cv_working_alloca_h = yes; then
AC_DEFINE(HAVE_ALLOCA_H, 1,
[Define if you have <alloca.h> and it should be used
(not on Ultrix).])
fi
AC_CACHE_CHECK([for alloca], ac_cv_func_alloca_works,
[AC_TRY_LINK(
[#ifdef __GNUC__
# define alloca __builtin_alloca
#else
# ifdef _MSC_VER
# include <malloc.h>
# define alloca _alloca
# else
# if HAVE_ALLOCA_H
# include <alloca.h>
# else
# ifdef _AIX
#pragma alloca
# else
# ifndef alloca /* predefined by HP cc +Olibcalls */
char *alloca ();
# endif
# endif
# endif
# endif
#endif
], [char *p = (char *) alloca(1);],
ac_cv_func_alloca_works=yes, ac_cv_func_alloca_works=no)])
if test $ac_cv_func_alloca_works = yes; then
AC_DEFINE(HAVE_ALLOCA, 1,
[Define if you have `alloca', as a function or macro.])
fi
if test $ac_cv_func_alloca_works = no; then
# The SVR3 libPW and SVR4 libucb both contain incompatible functions
# that cause trouble. Some versions do not even contain alloca or
# contain a buggy version. If you still want to use their alloca,
# use ar to extract alloca.o from them instead of compiling alloca.c.
ALLOCA=alloca.${ac_objext}
AC_DEFINE(C_ALLOCA, 1, [Define if using `alloca.c'.])
AC_CACHE_CHECK(whether alloca needs Cray hooks, ac_cv_os_cray,
[AC_EGREP_CPP(webecray,
[#if defined(CRAY) && ! defined(CRAY2)
webecray
#else
wenotbecray
#endif
], ac_cv_os_cray=yes, ac_cv_os_cray=no)])
if test $ac_cv_os_cray = yes; then
for ac_func in _getb67 GETB67 getb67; do
AC_CHECK_FUNC($ac_func,
[AC_DEFINE_UNQUOTED(CRAY_STACKSEG_END, $ac_func,
[Define to one of _getb67, GETB67, getb67
for Cray-2 and Cray-YMP systems.
This function is required for alloca.c
support on those systems.])
break])
done
fi
AC_CACHE_CHECK(stack direction for C alloca, ac_cv_c_stack_direction,
[AC_TRY_RUN(
[find_stack_direction ()
{
static char *addr = 0;
auto char dummy;
if (addr == 0)
{
addr = &dummy;
return find_stack_direction ();
}
else
return (&dummy > addr) ? 1 : -1;
}
int
main ()
{
exit (find_stack_direction () < 0);
}], ac_cv_c_stack_direction=1, ac_cv_c_stack_direction=-1,
ac_cv_c_stack_direction=0)])
AC_DEFINE_UNQUOTED(STACK_DIRECTION, $ac_cv_c_stack_direction)
fi
AC_SUBST(ALLOCA)dnl
])# AC_FUNC_ALLOCA
# AC_FUNC_CLOSEDIR_VOID
# ---------------------
# Check whether closedir returns void, and #define CLOSEDIR_VOID in
# that case.
AC_DEFUN(AC_FUNC_CLOSEDIR_VOID,
[AC_REQUIRE([AC_HEADER_DIRENT])dnl
AC_CACHE_CHECK(whether closedir returns void, ac_cv_func_closedir_void,
[AC_TRY_RUN(
[#include <sys/types.h>
#include <$ac_header_dirent>
int closedir ();
int
main ()
{
exit (closedir (opendir (".")) != 0);
}],
ac_cv_func_closedir_void=no,
ac_cv_func_closedir_void=yes,
ac_cv_func_closedir_void=yes)])
if test $ac_cv_func_closedir_void = yes; then
AC_DEFINE(CLOSEDIR_VOID, 1,
[Define if the `closedir' function returns void instead of `int'.])
fi
])
# AC_FUNC_FNMATCH
# ---------------
# We look for fnmatch.h to avoid that the test fails in C++.
AC_DEFUN(AC_FUNC_FNMATCH,
[AC_CHECK_HEADERS(fnmatch.h)
AC_CACHE_CHECK(for working fnmatch, ac_cv_func_fnmatch_works,
# Some versions of Solaris or SCO have a broken fnmatch function.
# So we run a test program. If we are cross-compiling, take no chance.
# Thanks to John Oleynick and Franc,ois Pinard for this test.
[AC_TRY_RUN(
[#if HAVE_FNMATCH_H
# include <fnmatch.h>
#endif
int
main ()
{
exit (fnmatch ("a*", "abc", 0) != 0);
}],
ac_cv_func_fnmatch_works=yes, ac_cv_func_fnmatch_works=no,
ac_cv_func_fnmatch_works=no)])
if test $ac_cv_func_fnmatch_works = yes; then
AC_DEFINE(HAVE_FNMATCH, 1,
[Define if your system has a working `fnmatch' function.])
fi
])# AC_FUNC_FNMATCH
# _AC_LIBOBJ_GETLOADAVG
# ---------------------
# Set up the AC_LIBOBJ replacement of `getloadavg'.
define([_AC_LIBOBJ_GETLOADAVG],
[AC_LIBOBJ(getloadavg)
AC_DEFINE(C_GETLOADAVG, 1, [Define if using `getloadavg.c'.])
# Figure out what our getloadavg.c needs.
ac_have_func=no
AC_CHECK_HEADER(sys/dg_sys_info.h,
[ac_have_func=yes
AC_DEFINE(DGUX, 1, [Define for DGUX with <sys/dg_sys_info.h>.])
AC_CHECK_LIB(dgc, dg_sys_info)])
AC_CHECK_HEADER(locale.h)
AC_CHECK_FUNCS(setlocale)
# We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
# uses stabs), but it is still SVR4. We cannot check for <elf.h> because
# Irix 4.0.5F has the header but not the library.
if test $ac_have_func = no && test $ac_cv_lib_elf_elf_begin = yes; then
ac_have_func=yes
AC_DEFINE(SVR4, 1, [Define on System V Release 4.])
fi
if test $ac_have_func = no; then
AC_CHECK_HEADER(inq_stats/cpustats.h,
[ac_have_func=yes
AC_DEFINE(UMAX, 1, [Define for Encore UMAX.])
AC_DEFINE(UMAX4_3, 1,
[Define for Encore UMAX 4.3 that has <inq_status/cpustats.h>
instead of <sys/cpustats.h>.])])
fi
if test $ac_have_func = no; then
AC_CHECK_HEADER(sys/cpustats.h,
[ac_have_func=yes; AC_DEFINE(UMAX)])
fi
if test $ac_have_func = no; then
AC_CHECK_HEADERS(mach/mach.h)
fi
AC_CHECK_HEADERS(nlist.h,
[AC_CHECK_MEMBERS([struct nlist.n_un.n_name],
[AC_DEFINE(NLIST_NAME_UNION, 1,
[Define if your `struct nlist' has an
`n_un' member. Obsolete, depend on
`HAVE_STRUCT_NLIST_N_UN_N_NAME])], [],
[@%:@include <nlist.h>])
])dnl
])# _AC_LIBOBJ_GETLOADAVG
# AC_FUNC_GETLOADAVG
# ------------------
AC_DEFUN([AC_FUNC_GETLOADAVG],
[ac_have_func=no # yes means we've found a way to get the load average.
ac_save_LIBS=$LIBS
# On HPUX9, an unprivileged user can get load averages through this function.
AC_CHECK_FUNCS(pstat_getdynamic)
# Solaris has libkstat which does not require root.
AC_CHECK_LIB(kstat, kstat_open)
test $ac_cv_lib_kstat_kstat_open = yes && ac_have_func=yes
# Some systems with -lutil have (and need) -lkvm as well, some do not.
# On Solaris, -lkvm requires nlist from -lelf, so check that first
# to get the right answer into the cache.
# For kstat on solaris, we need libelf to force the definition of SVR4 below.
AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS")
if test $ac_have_func = no; then
AC_CHECK_LIB(kvm, kvm_open, LIBS="-lkvm $LIBS")
# Check for the 4.4BSD definition of getloadavg.
AC_CHECK_LIB(util, getloadavg,
[LIBS="-lutil $LIBS" ac_have_func=yes ac_cv_func_getloadavg_setgid=yes])
fi
if test $ac_have_func = no; then
# There is a commonly available library for RS/6000 AIX.
# Since it is not a standard part of AIX, it might be installed locally.
ac_getloadavg_LIBS=$LIBS
LIBS="-L/usr/local/lib $LIBS"
AC_CHECK_LIB(getloadavg, getloadavg,
[LIBS="-lgetloadavg $LIBS"], [LIBS=$ac_getloadavg_LIBS])
fi
# Make sure it is really in the library, if we think we found it,
# otherwise set up the replacement function.
AC_CHECK_FUNCS(getloadavg, [],
[_AC_LIBOBJ_GETLOADAVG])
# Some definitions of getloadavg require that the program be installed setgid.
dnl FIXME: Don't hardwire the path of getloadavg.c in the top-level directory.
AC_CACHE_CHECK(whether getloadavg requires setgid,
ac_cv_func_getloadavg_setgid,
[AC_EGREP_CPP([Yowza Am I SETGID yet],
[#include "$srcdir/getloadavg.c"
#ifdef LDAV_PRIVILEGED
Yowza Am I SETGID yet
@%:@endif],
ac_cv_func_getloadavg_setgid=yes,
ac_cv_func_getloadavg_setgid=no)])
if test $ac_cv_func_getloadavg_setgid = yes; then
NEED_SETGID=true
AC_DEFINE(GETLOADAVG_PRIVILEGED, 1,
[Define if the `getloadavg' function needs to be run setuid
or setgid.])
else
NEED_SETGID=false
fi
AC_SUBST(NEED_SETGID)dnl
if test $ac_cv_func_getloadavg_setgid = yes; then
AC_CACHE_CHECK(group of /dev/kmem, ac_cv_group_kmem,
[ # On Solaris, /dev/kmem is a symlink. Get info on the real file.
ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
# If we got an error (system does not support symlinks), try without -L.
test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
ac_cv_group_kmem=`echo $ac_ls_output \
| sed -ne ['s/[ ][ ]*/ /g;
s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\) *.*/\1/;
/ /s/.* //;p;']`
])
AC_SUBST(KMEM_GROUP, $ac_cv_group_kmem)dnl
fi
if test "x$ac_save_LIBS" = x; then
GETLOADAVG_LIBS=$LIBS
else
GETLOADAVG_LIBS=`echo "$LIBS" | sed "s!$ac_save_LIBS!!"`
fi
AC_SUBST(GETLOADAVG_LIBS)dnl
])# AC_FUNC_GETLOADAVG
# AC_FUNC_GETMNTENT
# -----------------
AC_DEFUN(AC_FUNC_GETMNTENT,
[# getmntent is in -lsun on Irix 4, -lseq on Dynix/PTX, -lgen on Unixware.
AC_CHECK_LIB(sun, getmntent, LIBS="-lsun $LIBS",
[AC_CHECK_LIB(seq, getmntent, LIBS="-lseq $LIBS",
[AC_CHECK_LIB(gen, getmntent, LIBS="-lgen $LIBS")])])
AC_CHECK_FUNC(getmntent,
[AC_DEFINE(HAVE_GETMNTENT, 1,
[Define if you have the `getmntent' function.])])])
# AC_FUNC_GETPGRP
# ---------------
AC_DEFUN(AC_FUNC_GETPGRP,
[AC_CACHE_CHECK(whether getpgrp takes no argument, ac_cv_func_getpgrp_void,
[AC_TRY_RUN(
[/*
* If this system has a BSD-style getpgrp(),
* which takes a pid argument, exit unsuccessfully.
*
* Snarfed from Chet Ramey's bash pgrp.c test program
*/
#include <stdio.h>
#include <sys/types.h>
int pid;
int pg1, pg2, pg3, pg4;
int ng, np, s, child;
int
main ()
{
pid = getpid ();
pg1 = getpgrp (0);
pg2 = getpgrp ();
pg3 = getpgrp (pid);
pg4 = getpgrp (1);
/* If all of these values are the same, it's pretty sure that we're
on a system that ignores getpgrp's first argument. */
if (pg2 == pg4 && pg1 == pg3 && pg2 == pg3)
exit (0);
child = fork ();
if (child < 0)
exit(1);
else if (child == 0)
{
np = getpid ();
/* If this is Sys V, this will not work; pgrp will be set to np
because setpgrp just changes a pgrp to be the same as the
pid. */
setpgrp (np, pg1);
ng = getpgrp (0); /* Same result for Sys V and BSD */
if (ng == pg1)
exit (1);
else
exit (0);
}
else
{
wait (&s);
exit (s>>8);
}
}], ac_cv_func_getpgrp_void=yes, ac_cv_func_getpgrp_void=no,
AC_MSG_ERROR(cannot check getpgrp if cross compiling))
])
if test $ac_cv_func_getpgrp_void = yes; then
AC_DEFINE(GETPGRP_VOID, 1,
[Define if the `getpgrp' function takes no argument.])
fi
])# AC_FUNC_GETPGRP
# AC_FUNC_MKTIME
# --------------
AC_DEFUN(AC_FUNC_MKTIME,
[AC_REQUIRE([AC_HEADER_TIME])dnl
AC_CHECK_HEADERS(sys/time.h unistd.h)
AC_CHECK_FUNCS(alarm)
AC_CACHE_CHECK([for working mktime], ac_cv_func_working_mktime,
[AC_TRY_RUN(
[/* Test program from Paul Eggert and Tony Leneis. */
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#if !HAVE_ALARM
# define alarm(X) /* empty */
#endif
/* Work around redefinition to rpl_putenv by other config tests. */
#undef putenv
static time_t time_t_max;
/* Values we'll use to set the TZ environment variable. */
static const char *const tz_strings[] = {
(const char *) 0, "TZ=GMT0", "TZ=JST-9",
"TZ=EST+3EDT+2,M10.1.0/00:00:00,M2.3.0/00:00:00"
};
#define N_STRINGS (sizeof (tz_strings) / sizeof (tz_strings[0]))
/* Fail if mktime fails to convert a date in the spring-forward gap.
Based on a problem report from Andreas Jaeger. */
static void
spring_forward_gap ()
{
/* glibc (up to about 1998-10-07) failed this test) */
struct tm tm;
/* Use the portable POSIX.1 specification "TZ=PST8PDT,M4.1.0,M10.5.0"
instead of "TZ=America/Vancouver" in order to detect the bug even
on systems that don't support the Olson extension, or don't have the
full zoneinfo tables installed. */
putenv ("TZ=PST8PDT,M4.1.0,M10.5.0");
tm.tm_year = 98;
tm.tm_mon = 3;
tm.tm_mday = 5;
tm.tm_hour = 2;
tm.tm_min = 0;
tm.tm_sec = 0;
tm.tm_isdst = -1;
if (mktime (&tm) == (time_t)-1)
exit (1);
}
static void
mktime_test (now)
time_t now;
{
struct tm *lt;
if ((lt = localtime (&now)) && mktime (lt) != now)
exit (1);
now = time_t_max - now;
if ((lt = localtime (&now)) && mktime (lt) != now)
exit (1);
}
static void
irix_6_4_bug ()
{
/* Based on code from Ariel Faigon. */
struct tm tm;
tm.tm_year = 96;
tm.tm_mon = 3;
tm.tm_mday = 0;
tm.tm_hour = 0;
tm.tm_min = 0;
tm.tm_sec = 0;
tm.tm_isdst = -1;
mktime (&tm);
if (tm.tm_mon != 2 || tm.tm_mday != 31)
exit (1);
}
static void
bigtime_test (j)
int j;
{
struct tm tm;
time_t now;
tm.tm_year = tm.tm_mon = tm.tm_mday = tm.tm_hour = tm.tm_min = tm.tm_sec = j;
now = mktime (&tm);
if (now != (time_t) -1)
{
struct tm *lt = localtime (&now);
if (! (lt
&& lt->tm_year == tm.tm_year
&& lt->tm_mon == tm.tm_mon
&& lt->tm_mday == tm.tm_mday
&& lt->tm_hour == tm.tm_hour
&& lt->tm_min == tm.tm_min
&& lt->tm_sec == tm.tm_sec
&& lt->tm_yday == tm.tm_yday
&& lt->tm_wday == tm.tm_wday
&& ((lt->tm_isdst < 0 ? -1 : 0 < lt->tm_isdst)
== (tm.tm_isdst < 0 ? -1 : 0 < tm.tm_isdst))))
exit (1);
}
}
int
main ()
{
time_t t, delta;
int i, j;
/* This test makes some buggy mktime implementations loop.
Give up after 60 seconds; a mktime slower than that
isn't worth using anyway. */
alarm (60);
for (time_t_max = 1; 0 < time_t_max; time_t_max *= 2)
continue;
time_t_max--;
delta = time_t_max / 997; /* a suitable prime number */
for (i = 0; i < N_STRINGS; i++)
{
if (tz_strings[i])
putenv (tz_strings[i]);
for (t = 0; t <= time_t_max - delta; t += delta)
mktime_test (t);
mktime_test ((time_t) 60 * 60);
mktime_test ((time_t) 60 * 60 * 24);
for (j = 1; 0 < j; j *= 2)
bigtime_test (j);
bigtime_test (j - 1);
}
irix_6_4_bug ();
spring_forward_gap ();
exit (0);
}],
ac_cv_func_working_mktime=yes, ac_cv_func_working_mktime=no,
ac_cv_func_working_mktime=no)])
if test $ac_cv_func_working_mktime = no; then
AC_LIBOBJ([mktime])
fi
])# AC_FUNC_MKTIME
# AC_FUNC_MMAP
# ------------
AC_DEFUN(AC_FUNC_MMAP,
[AC_CHECK_HEADERS(stdlib.h unistd.h sys/stat.h)
AC_CHECK_FUNCS(getpagesize)
AC_CACHE_CHECK(for working mmap, ac_cv_func_mmap_fixed_mapped,
[AC_TRY_RUN(
[/* Thanks to Mike Haertel and Jim Avera for this test.
Here is a matrix of mmap possibilities:
mmap private not fixed
mmap private fixed at somewhere currently unmapped
mmap private fixed at somewhere already mapped
mmap shared not fixed
mmap shared fixed at somewhere currently unmapped
mmap shared fixed at somewhere already mapped
For private mappings, we should verify that changes cannot be read()
back from the file, nor mmap's back from the file at a different
address. (There have been systems where private was not correctly
implemented like the infamous i386 svr4.0, and systems where the
VM page cache was not coherent with the file system buffer cache
like early versions of FreeBSD and possibly contemporary NetBSD.)
For shared mappings, we should conversely verify that changes get
propogated back to all the places they're supposed to be.
Grep wants private fixed already mapped.
The main things grep needs to know about mmap are:
* does it exist and is it safe to write into the mmap'd area
* how to use it (BSD variants) */
#include <sys/types.h>
#include <fcntl.h>
#include <sys/mman.h>
#if HAVE_STDLIB_H
# include <stdlib.h>
#else
char *malloc ();
#endif
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#if HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
/* This mess was copied from the GNU getpagesize.h. */
#if !HAVE_GETPAGESIZE
/* Assume that all systems that can run configure have sys/param.h. */
# if !HAVE_SYS_PARAM_H
# define HAVE_SYS_PARAM_H 1
# endif
# ifdef _SC_PAGESIZE
# define getpagesize() sysconf(_SC_PAGESIZE)
# else /* no _SC_PAGESIZE */
# if HAVE_SYS_PARAM_H
# include <sys/param.h>
# ifdef EXEC_PAGESIZE
# define getpagesize() EXEC_PAGESIZE
# else /* no EXEC_PAGESIZE */
# ifdef NBPG
# define getpagesize() NBPG * CLSIZE
# ifndef CLSIZE
# define CLSIZE 1
# endif /* no CLSIZE */
# else /* no NBPG */
# ifdef NBPC
# define getpagesize() NBPC
# else /* no NBPC */
# ifdef PAGESIZE
# define getpagesize() PAGESIZE
# endif /* PAGESIZE */
# endif /* no NBPC */
# endif /* no NBPG */
# endif /* no EXEC_PAGESIZE */
# else /* no HAVE_SYS_PARAM_H */
# define getpagesize() 8192 /* punt totally */
# endif /* no HAVE_SYS_PARAM_H */
# endif /* no _SC_PAGESIZE */
#endif /* no HAVE_GETPAGESIZE */
int
main ()
{
char *data, *data2, *data3;
int i, pagesize;
int fd;
pagesize = getpagesize ();
/* First, make a file with some known garbage in it. */
data = (char *) malloc (pagesize);
if (!data)
exit (1);
for (i = 0; i < pagesize; ++i)
*(data + i) = rand ();
umask (0);
fd = creat ("conftestmmap", 0600);
if (fd < 0)
exit (1);
if (write (fd, data, pagesize) != pagesize)
exit (1);
close (fd);
/* Next, try to mmap the file at a fixed address which already has
something else allocated at it. If we can, also make sure that
we see the same garbage. */
fd = open ("conftestmmap", O_RDWR);
if (fd < 0)
exit (1);
data2 = (char *) malloc (2 * pagesize);
if (!data2)
exit (1);
data2 += (pagesize - ((int) data2 & (pagesize - 1))) & (pagesize - 1);
if (data2 != mmap (data2, pagesize, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_FIXED, fd, 0L))
exit (1);
for (i = 0; i < pagesize; ++i)
if (*(data + i) != *(data2 + i))
exit (1);
/* Finally, make sure that changes to the mapped area do not
percolate back to the file as seen by read(). (This is a bug on
some variants of i386 svr4.0.) */
for (i = 0; i < pagesize; ++i)
*(data2 + i) = *(data2 + i) + 1;
data3 = (char *) malloc (pagesize);
if (!data3)
exit (1);
if (read (fd, data3, pagesize) != pagesize)
exit (1);
for (i = 0; i < pagesize; ++i)
if (*(data + i) != *(data3 + i))
exit (1);
close (fd);
unlink ("conftestmmap");
exit (0);
}], ac_cv_func_mmap_fixed_mapped=yes, ac_cv_func_mmap_fixed_mapped=no,
ac_cv_func_mmap_fixed_mapped=no)])
if test $ac_cv_func_mmap_fixed_mapped = yes; then
AC_DEFINE(HAVE_MMAP, 1,
[Define if you have a working `mmap' system call.])
fi
])# AC_FUNC_MMAP
# AC_FUNC_MEMCMP
# --------------
AC_DEFUN(AC_FUNC_MEMCMP,
[AC_CACHE_CHECK(for 8-bit clean memcmp, ac_cv_func_memcmp_clean,
[AC_TRY_RUN(
[int
main()
{
char c0 = 0x40, c1 = 0x80, c2 = 0x81;
exit (memcmp(&c0, &c2, 1) < 0
&& memcmp(&c1, &c2, 1) < 0 ? 0 : 1);
}], ac_cv_func_memcmp_clean=yes, ac_cv_func_memcmp_clean=no,
ac_cv_func_memcmp_clean=no)])
test $ac_cv_func_memcmp_clean = no && AC_LIBOBJ([memcmp])
])# AC_FUNC_MEMCMP
# AC_FUNC_SELECT_ARGTYPES
# -----------------------
# Determine the correct type to be passed to each of the `select'
# function's arguments, and define those types in `SELECT_TYPE_ARG1',
# `SELECT_TYPE_ARG234', and `SELECT_TYPE_ARG5'.
AC_DEFUN(AC_FUNC_SELECT_ARGTYPES,
[AC_CACHE_CHECK([types of arguments for select],
[ac_cv_func_select_args],
[for ac_arg234 in 'fd_set *' 'int *' 'void *'; do
for ac_arg1 in 'int' 'size_t' 'unsigned long' 'unsigned'; do
for ac_arg5 in 'struct timeval *' 'const struct timeval *'; do
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[#include <sys/types.h>
#if HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#if HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#if HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
extern int select ($ac_arg1,$ac_arg234,$ac_arg234,$ac_arg234,$ac_arg5);])],
[ac_cv_func_select_args="$ac_arg1,$ac_arg234,$ac_arg5"; break 3])
done
done
done
# Provide a safe default value.
: ${ac_cv_func_select_args='int,int *,struct timeval *'}
])
ac_save_IFS=$IFS; IFS=','
set dummy `echo "$ac_cv_func_select_args" | sed -e 's/\*/\*/g'`
IFS=$ac_save_IFS
shift
AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG1, $[1],
[Define to the type of arg 1 for `select'.])
AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG234, ($[2]),
[Define to the type of args 2, 3 and 4 for `select'.])
AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG5, ($[3]),
[Define to the type of arg 5 for `select'.])
])# AC_FUNC_SELECT_ARGTYPES
# AC_FUNC_SETPGRP
# ---------------
AC_DEFUN(AC_FUNC_SETPGRP,
[AC_CACHE_CHECK(whether setpgrp takes no argument, ac_cv_func_setpgrp_void,
AC_TRY_RUN(
[#if HAVE_UNISTD_H
# include <unistd.h>
#endif
/* If this system has a BSD-style setpgrp, which takes arguments, exit
successfully. */
int
main ()
{
if (setpgrp (1,1) == -1)
exit (0);
else
exit (1);
}], ac_cv_func_setpgrp_void=no, ac_cv_func_setpgrp_void=yes,
AC_MSG_ERROR(cannot check setpgrp if cross compiling))
)
if test $ac_cv_func_setpgrp_void = yes; then
AC_DEFINE(SETPGRP_VOID, 1,
[Define if the `setpgrp' function takes no argument.])
fi
])# AC_FUNC_SETPGRP
# AC_FUNC_STRFTIME
# ----------------
AC_DEFUN(AC_FUNC_STRFTIME,
[AC_CHECK_FUNC(strftime,
[AC_DEFINE(HAVE_STRFTIME, 1,
[Define if you have the `strftime' function.])],
[# strftime is in -lintl on SCO UNIX.
AC_CHECK_LIB(intl, strftime,
[AC_DEFINE(HAVE_STRFTIME, 1,
[Define if you have the `strftime' function.])
LIBS="-lintl $LIBS"])])dnl
])# AC_FUNC_STRFTIME
# AC_FUNC_VFORK
# -------------
AC_DEFUN(AC_FUNC_VFORK,
[AC_REQUIRE([AC_TYPE_PID_T])dnl
AC_CHECK_HEADER(vfork.h,
AC_DEFINE(HAVE_VFORK_H, 1,
[Define if you have <vfork.h>.]))
AC_CACHE_CHECK(for working vfork, ac_cv_func_vfork_works,
[AC_TRY_RUN([/* Thanks to Paul Eggert for this test. */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#if HAVE_VFORK_H
# include <vfork.h>
#endif
/* On some sparc systems, changes by the child to local and incoming
argument registers are propagated back to the parent. The compiler
is told about this with #include <vfork.h>, but some compilers
(e.g. gcc -O) don't grok <vfork.h>. Test for this by using a
static variable whose address is put into a register that is
clobbered by the vfork. */
static
#ifdef __cplusplus
sparc_address_test (int arg)
# else
sparc_address_test (arg) int arg;
#endif
{
static pid_t child;
if (!child) {
child = vfork ();
if (child < 0) {
perror ("vfork");
_exit(2);
}
if (!child) {
arg = getpid();
write(-1, "", 0);
_exit (arg);
}
}
}
int
main ()
{
pid_t parent = getpid ();
pid_t child;
sparc_address_test ();
child = vfork ();
if (child == 0) {
/* Here is another test for sparc vfork register problems. This
test uses lots of local variables, at least as many local
variables as main has allocated so far including compiler
temporaries. 4 locals are enough for gcc 1.40.3 on a Solaris
4.1.3 sparc, but we use 8 to be safe. A buggy compiler should
reuse the register of parent for one of the local variables,
since it will think that parent can't possibly be used any more
in this routine. Assigning to the local variable will thus
munge parent in the parent process. */
pid_t
p = getpid(), p1 = getpid(), p2 = getpid(), p3 = getpid(),
p4 = getpid(), p5 = getpid(), p6 = getpid(), p7 = getpid();
/* Convince the compiler that p..p7 are live; otherwise, it might
use the same hardware register for all 8 local variables. */
if (p != p1 || p != p2 || p != p3 || p != p4
|| p != p5 || p != p6 || p != p7)
_exit(1);
/* On some systems (e.g. IRIX 3.3), vfork doesn't separate parent
from child file descriptors. If the child closes a descriptor
before it execs or exits, this munges the parent's descriptor
as well. Test for this by closing stdout in the child. */
_exit(close(fileno(stdout)) != 0);
} else {
int status;
struct stat st;
while (wait(&status) != child)
;
exit(
/* Was there some problem with vforking? */
child < 0
/* Did the child fail? (This shouldn't happen.) */
|| status
/* Did the vfork/compiler bug occur? */
|| parent != getpid()
/* Did the file descriptor bug occur? */
|| fstat(fileno(stdout), &st) != 0
);
}
}],
ac_cv_func_vfork_works=yes, ac_cv_func_vfork_works=no, AC_CHECK_FUNC(vfork)
ac_cv_func_vfork_works=$ac_cv_func_vfork)])
if test "x$ac_cv_func_vfork_works" = xno; then
AC_DEFINE(vfork, fork, [Define as `fork' if `vfork' does not work.])
fi
])# AC_FUNC_VFORK
# AC_FUNC_VPRINTF
# ---------------
# Why the heck is that _doprnt does not define HAVE__DOPRNT???
# That the logical name! In addition, why doesn't it use
# AC_CHECK_FUNCS(vprintf)? Because old Autoconf uses sh for loops.
# FIXME: To be changed in Autoconf 3?
AC_DEFUN(AC_FUNC_VPRINTF,
[AC_CHECK_FUNC(vprintf,
AC_DEFINE(HAVE_VPRINTF, 1,
[Define if you have the `vprintf' function.]))
if test "$ac_cv_func_vprintf" != yes; then
AC_CHECK_FUNC(_doprnt,
AC_DEFINE(HAVE_DOPRNT, 1,
[Define if you don't have `vprintf' but do have
`_doprnt.']))
fi
])
# AC_FUNC_WAIT3
# -------------
AC_DEFUN(AC_FUNC_WAIT3,
[AC_CACHE_CHECK(for wait3 that fills in rusage, ac_cv_func_wait3_rusage,
[AC_TRY_RUN(
[#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdio.h>
/* HP-UX has wait3 but does not fill in rusage at all. */
int
main ()
{
struct rusage r;
int i;
/* Use a field that we can force nonzero --
voluntary context switches.
For systems like NeXT and OSF/1 that don't set it,
also use the system CPU time. And page faults (I/O) for Linux. */
r.ru_nvcsw = 0;
r.ru_stime.tv_sec = 0;
r.ru_stime.tv_usec = 0;
r.ru_majflt = r.ru_minflt = 0;
switch (fork ())
{
case 0: /* Child. */
sleep(1); /* Give up the CPU. */
_exit(0);
case -1: /* What can we do? */
_exit(0);
default: /* Parent. */
wait3(&i, 0, &r);
/* Avoid "text file busy" from rm on fast HP-UX machines. */
sleep(2);
exit (r.ru_nvcsw == 0 && r.ru_majflt == 0 && r.ru_minflt == 0
&& r.ru_stime.tv_sec == 0 && r.ru_stime.tv_usec == 0);
}
}], ac_cv_func_wait3_rusage=yes, ac_cv_func_wait3_rusage=no,
ac_cv_func_wait3_rusage=no)])
if test $ac_cv_func_wait3_rusage = yes; then
AC_DEFINE(HAVE_WAIT3, 1,
[Define if you have the `wait3' system call.])
fi
])# AC_FUNC_WAIT3
# AC_FUNC_UTIME_NULL
# ------------------
AC_DEFUN(AC_FUNC_UTIME_NULL,
[AC_CACHE_CHECK(whether utime accepts a null argument, ac_cv_func_utime_null,
[rm -f conftestdata; >conftestdata
# Sequent interprets utime(file, 0) to mean use start of epoch. Wrong.
AC_TRY_RUN(
[#include <sys/types.h>
#include <sys/stat.h>
int
main()
{
struct stat s, t;
exit (!(stat ("conftestdata", &s) == 0
&& utime ("conftestdata", (long *)0) == 0
&& stat ("conftestdata", &t) == 0
&& t.st_mtime >= s.st_mtime
&& t.st_mtime - s.st_mtime < 120));
}], ac_cv_func_utime_null=yes, ac_cv_func_utime_null=no,
ac_cv_func_utime_null=no)
rm -f core core.* *.core])
if test $ac_cv_func_utime_null = yes; then
AC_DEFINE(HAVE_UTIME_NULL, 1,
[Define if `utime(file, NULL)' sets file's timestamp to the
present.])
fi
])# AC_FUNC_UTIME_NULL
# AC_FUNC_STRCOLL
# ---------------
AC_DEFUN(AC_FUNC_STRCOLL,
[AC_CACHE_CHECK(for working strcoll, ac_cv_func_strcoll_works,
[AC_TRY_RUN([#include <string.h>
int
main ()
{
exit (strcoll ("abc", "def") >= 0 ||
strcoll ("ABC", "DEF") >= 0 ||
strcoll ("123", "456") >= 0);
}], ac_cv_func_strcoll_works=yes, ac_cv_func_strcoll_works=no,
ac_cv_func_strcoll_works=no)])
if test $ac_cv_func_strcoll_works = yes; then
AC_DEFINE(HAVE_STRCOLL, 1,
[Define if you have the `strcoll' function and it is properly
defined.])
fi
])# AC_FUNC_STRCOLL
# AC_FUNC_SETVBUF_REVERSED
# ------------------------
AC_DEFUN(AC_FUNC_SETVBUF_REVERSED,
[AC_CACHE_CHECK(whether setvbuf arguments are reversed,
ac_cv_func_setvbuf_reversed,
[AC_TRY_RUN([#include <stdio.h>
/* If setvbuf has the reversed format, exit 0. */
int
main ()
{
/* This call has the arguments reversed.
A reversed system may check and see that the address of main
is not _IOLBF, _IONBF, or _IOFBF, and return nonzero. */
if (setvbuf(stdout, _IOLBF, (char *) main, BUFSIZ) != 0)
exit(1);
putc('\r', stdout);
exit(0); /* Non-reversed systems segv here. */
}], ac_cv_func_setvbuf_reversed=yes, ac_cv_func_setvbuf_reversed=no)
rm -f core core.* *.core])
if test $ac_cv_func_setvbuf_reversed = yes; then
AC_DEFINE(SETVBUF_REVERSED, 1,
[Define if the `setvbuf' function takes the buffering type as
its second argument and the buffer pointer as the third, as on
System V before release 3.])
fi
])# AC_FUNC_SETVBUF_REVERSED
## ------------------------------ ##
## Checks for structure members. ##
## ------------------------------ ##
# AC_STRUCT_TM
# ------------
# FIXME: This macro is badly named, it should be AC_CHECK_TYPE_STRUCT_TM.
# Or something else, but what? AC_CHECK_TYPE_STRUCT_TM_IN_SYS_TIME?
AC_DEFUN(AC_STRUCT_TM,
[AC_CACHE_CHECK([whether struct tm is in sys/time.h or time.h],
ac_cv_struct_tm,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/types.h>
#include <time.h>
],
[struct tm *tp; tp->tm_sec;])],
[ac_cv_struct_tm=time.h],
[ac_cv_struct_tm=sys/time.h])])
if test $ac_cv_struct_tm = sys/time.h; then
AC_DEFINE(TM_IN_SYS_TIME, 1,
[Define if your <sys/time.h> declares `struct tm'.])
fi
])# AC_STRUCT_TM
# AC_STRUCT_TIMEZONE
# ------------------
# Figure out how to get the current timezone. If `struct tm' has a
# `tm_zone' member, define `HAVE_TM_ZONE'. Otherwise, if the
# external array `tzname' is found, define `HAVE_TZNAME'.
AC_DEFUN(AC_STRUCT_TIMEZONE,
[AC_REQUIRE([AC_STRUCT_TM])dnl
AC_CHECK_MEMBERS([struct tm.tm_zone],,,[#include <sys/types.h>
#include <$ac_cv_struct_tm>
])
if test "$ac_cv_member_struct_tm_tm_zone" = yes; then
AC_DEFINE(HAVE_TM_ZONE, 1,
[Define if your `struct tm' has `tm_zone'. Deprecated, use
`HAVE_STRUCT_TM_TM_ZONE' instead.])
else
AC_CACHE_CHECK(for tzname, ac_cv_var_tzname,
[AC_TRY_LINK(
[#include <time.h>
#ifndef tzname /* For SGI. */
extern char *tzname[]; /* RS6000 and others reject char **tzname. */
#endif
],
[atoi(*tzname);], ac_cv_var_tzname=yes, ac_cv_var_tzname=no)])
if test $ac_cv_var_tzname = yes; then
AC_DEFINE(HAVE_TZNAME, 1,
[Define if you don't have `tm_zone' but do have the external
array `tzname'.])
fi
fi
])# AC_STRUCT_TIMEZONE
# FIXME: The following three macros should no longer be supported in the
# future. They made sense when there was no means to directly check for
# members of aggregates.
# AC_STRUCT_ST_BLKSIZE
# --------------------
AU_DEFUN(AC_STRUCT_ST_BLKSIZE,
[AC_WARNING([$0:
your code should no longer depend upon `HAVE_ST_BLKSIZE', but
`HAVE_STRUCT_STAT_ST_BLKSIZE'. Remove this AC_WARNING and
the `AC_DEFINE' when you adjust the code.])
AC_CHECK_MEMBERS([struct stat.st_blksize],
[AC_DEFINE(HAVE_ST_BLKSIZE, 1,
[Define if your `struct stat' has
`st_blksize'. Deprecated, use
`HAVE_STRUCT_STAT_ST_BLKSIZE' instead.])],,
[#include <sys/types.h>
#include <sys/stat.h>
])dnl
])# AC_STRUCT_ST_BLKSIZE
# AC_STRUCT_ST_BLOCKS
# -------------------
# If `struct stat' contains an `st_blocks' member, define
# HAVE_STRUCT_STAT_ST_BLOCKS. Otherwise, add `fileblocks.o' to the
# output variable LIBOBJS. We still define HAVE_ST_BLOCKS for backward
# compatibility. In the future, we will activate specializations for
# this macro, so don't obsolete it right now.
#
# AC_OBSOLETE([$0], [; replace it with
# AC_CHECK_MEMBERS([struct stat.st_blocks],
# [AC_LIBOBJ([fileblocks])])
# Please note that it will define `HAVE_STRUCT_STAT_ST_BLOCKS',
# and not `HAVE_ST_BLOCKS'.])dnl
#
AC_DEFUN(AC_STRUCT_ST_BLOCKS,
[AC_CHECK_MEMBERS([struct stat.st_blocks],
[AC_DEFINE(HAVE_ST_BLOCKS, 1,
[Define if your `struct stat' has
`st_blocks'. Deprecated, use
`HAVE_STRUCT_STAT_ST_BLOCKS' instead.])],
[AC_LIBOBJ([fileblocks])],
[#include <sys/types.h>
#include <sys/stat.h>
])dnl
])# AC_STRUCT_ST_BLOCKS
# AC_STRUCT_ST_RDEV
# -----------------
AU_DEFUN(AC_STRUCT_ST_RDEV,
[AC_WARNING([$0:
your code should no longer depend upon `HAVE_ST_RDEV', but
`HAVE_STRUCT_STAT_ST_RDEV'. Remove this AC_WARNING and
the `AC_DEFINE' when you adjust the code.])
AC_CHECK_MEMBERS([struct stat.st_rdev],
[AC_DEFINE(HAVE_ST_RDEV, 1,
[Define if your `struct stat' has `st_rdev'.
Deprecated, use `HAVE_STRUCT_STAT_ST_RDEV'
instead.])],,
[#include <sys/types.h>
#include <sys/stat.h>
])dnl
])# AC_STRUCT_ST_RDEV
## -------------------------------------- ##
## Checks for operating system services. ##
## -------------------------------------- ##
# AC_SYS_INTERPRETER
# ------------------
AC_DEFUN(AC_SYS_INTERPRETER,
[AC_CACHE_CHECK(whether @%:@! works in shell scripts, ac_cv_sys_interpreter,
[echo '#! /bin/cat
exit 69
' >conftest
chmod u+x conftest
(SHELL=/bin/sh; export SHELL; ./conftest >/dev/null)
if test $? -ne 69; then
ac_cv_sys_interpreter=yes
else
ac_cv_sys_interpreter=no
fi
rm -f conftest])
interpval=$ac_cv_sys_interpreter
])
AC_DEFUNCT(AC_HAVE_POUNDBANG, [;use AC_SYS_INTERPRETER, taking no arguments])
AC_DEFUNCT(AC_ARG_ARRAY, [; don't do unportable things with arguments])
# AC_SYS_LONG_FILE_NAMES
# ----------------------
# Security: use a temporary directory as the most portable way of
# creating files in /tmp securely. Removing them leaves a race
# condition, set -C is not portably guaranteed to use O_EXCL, so still
# leaves a race, and not all systems have the `mktemp' utility. We
# still test for existence first in case of broken systems where the
# mkdir succeeds even when the directory exists. Broken systems may
# retain a race, but they probably have other security problems
# anyway; this should be secure on well-behaved systems. In any case,
# use of `mktemp' is probably inappropriate here since it would fail in
# attempting to create different file names differing after the 14th
# character on file systems without long file names.
AC_DEFUN(AC_SYS_LONG_FILE_NAMES,
[AC_CACHE_CHECK(for long file names, ac_cv_sys_long_file_names,
[ac_cv_sys_long_file_names=yes
# Test for long file names in all the places we know might matter:
# . the current directory, where building will happen
# $prefix/lib where we will be installing things
# $exec_prefix/lib likewise
# eval it to expand exec_prefix.
# $TMPDIR if set, where it might want to write temporary files
# if $TMPDIR is not set:
# /tmp where it might want to write temporary files
# /var/tmp likewise
# /usr/tmp likewise
if test -n "$TMPDIR" && test -d "$TMPDIR" && test -w "$TMPDIR"; then
ac_tmpdirs=$TMPDIR
else
ac_tmpdirs='/tmp /var/tmp /usr/tmp'
fi
for ac_dir in . $ac_tmpdirs `eval echo $prefix/lib $exec_prefix/lib` ; do
test -d $ac_dir || continue
test -w $ac_dir || continue # It is less confusing to not echo anything here.
ac_xdir=$ac_dir/cf$$
(umask 077 && mkdir $ac_xdir 2>/dev/null) || continue
ac_tf1=$ac_xdir/conftest9012345
ac_tf2=$ac_xdir/conftest9012346
(echo 1 >$ac_tf1) 2>/dev/null
(echo 2 >$ac_tf2) 2>/dev/null
ac_val=`cat $ac_tf1 2>/dev/null`
if test ! -f $ac_tf1 || test "$ac_val" != 1; then
ac_cv_sys_long_file_names=no
rm -rf $ac_xdir 2>/dev/null
break
fi
rm -rf $ac_xdir 2>/dev/null
done])
if test $ac_cv_sys_long_file_names = yes; then
AC_DEFINE(HAVE_LONG_FILE_NAMES, 1,
[Define if you support file names longer than 14 characters.])
fi
])
# AC_SYS_RESTARTABLE_SYSCALLS
# ---------------------------
# If the system automatically restarts a system call that is
# interrupted by a signal, define `HAVE_RESTARTABLE_SYSCALLS'.
AC_DEFUN(AC_SYS_RESTARTABLE_SYSCALLS,
[AC_REQUIRE([AC_HEADER_SYS_WAIT])dnl
AC_CHECK_HEADERS(unistd.h)
AC_CACHE_CHECK(for restartable system calls, ac_cv_sys_restartable_syscalls,
[AC_TRY_RUN(
[/* Exit 0 (true) if wait returns something other than -1,
i.e. the pid of the child, which means that wait was restarted
after getting the signal. */
#include <sys/types.h>
#include <signal.h>
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#if HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif
/* Some platforms explicitly require an extern "C" signal handler
when using C++. */
#ifdef __cplusplus
extern "C" void ucatch (int dummy) { }
#else
void ucatch (dummy) int dummy; { }
#endif
int
main ()
{
int i = fork (), status;
if (i == 0)
{
sleep (3);
kill (getppid (), SIGINT);
sleep (3);
exit (0);
}
signal (SIGINT, ucatch);
status = wait (&i);
if (status == -1)
wait (&i);
exit (status == -1);
}], ac_cv_sys_restartable_syscalls=yes, ac_cv_sys_restartable_syscalls=no)])
if test $ac_cv_sys_restartable_syscalls = yes; then
AC_DEFINE(HAVE_RESTARTABLE_SYSCALLS, 1,
[Define if system calls automatically restart after interruption
by a signal.])
fi
])# AC_SYS_RESTARTABLE_SYSCALLS
## --------------------- ##
## Checks for X window. ##
## --------------------- ##
# AC_PATH_X
# ---------
# If we find X, set shell vars x_includes and x_libraries to the
# paths, otherwise set no_x=yes.
# Uses ac_ vars as temps to allow command line to override cache and checks.
# --without-x overrides everything else, but does not touch the cache.
AC_DEFUN(AC_PATH_X,
[AC_REQUIRE_CPP()dnl Set CPP; we run _AC_PATH_X_DIRECT conditionally.
AC_MSG_CHECKING(for X)
dnl Document the X abnormal options inherited from history.
AC_EXPAND_ONCE([AC_DIVERT_PUSH([HELP_BEGIN])dnl
X features:
--x-includes=DIR X include files are in DIR
--x-libraries=DIR X library files are in DIR
AC_DIVERT_POP()])dnl
AC_ARG_WITH(x, [ --with-x use the X Window System])
# $have_x is `yes', `no', `disabled', or empty when we do not yet know.
if test "x$with_x" = xno; then
# The user explicitly disabled X.
have_x=disabled
else
if test "x$x_includes" != xNONE && test "x$x_libraries" != xNONE; then
# Both variables are already set.
have_x=yes
else
AC_CACHE_VAL(ac_cv_have_x,
[# One or both of the vars are not set, and there is no cached value.
ac_x_includes=NO ac_x_libraries=NO
_AC_PATH_X_XMKMF
_AC_PATH_X_DIRECT
if test "$ac_x_includes" = NO || test "$ac_x_libraries" = NO; then
# Didn't find X anywhere. Cache the known absence of X.
ac_cv_have_x="have_x=no"
else
# Record where we found X for the cache.
ac_cv_have_x="have_x=yes \
ac_x_includes=$ac_x_includes ac_x_libraries=$ac_x_libraries"
fi])dnl
fi
eval "$ac_cv_have_x"
fi # $with_x != no
if test "$have_x" != yes; then
AC_MSG_RESULT($have_x)
no_x=yes
else
# If each of the values was on the command line, it overrides each guess.
test "x$x_includes" = xNONE && x_includes=$ac_x_includes
test "x$x_libraries" = xNONE && x_libraries=$ac_x_libraries
# Update the cache value to reflect the command line values.
ac_cv_have_x="have_x=yes \
ac_x_includes=$x_includes ac_x_libraries=$x_libraries"
AC_MSG_RESULT([libraries $x_libraries, headers $x_includes])
fi
])# AC_PATH_X
# _AC_PATH_X_XMKMF
# ---------------
# Internal subroutine of AC_PATH_X.
# Set ac_x_includes and/or ac_x_libraries.
AC_DEFUN(_AC_PATH_X_XMKMF,
[rm -fr conftestdir
if mkdir conftestdir; then
cd conftestdir
# Make sure to not put "make" in the Imakefile rules, since we grep it out.
cat >Imakefile <<'EOF'
acfindx:
@echo 'ac_im_incroot="${INCROOT}"; ac_im_usrlibdir="${USRLIBDIR}"; ac_im_libdir="${LIBDIR}"'
EOF
if (xmkmf) >/dev/null 2>/dev/null && test -f Makefile; then
# GNU make sometimes prints "make[1]: Entering...", which would confuse us.
eval `${MAKE-make} acfindx 2>/dev/null | grep -v make`
# Open Windows xmkmf reportedly sets LIBDIR instead of USRLIBDIR.
for ac_extension in a so sl; do
if test ! -f $ac_im_usrlibdir/libX11.$ac_extension &&
test -f $ac_im_libdir/libX11.$ac_extension; then
ac_im_usrlibdir=$ac_im_libdir; break
fi
done
# Screen out bogus values from the imake configuration. They are
# bogus both because they are the default anyway, and because
# using them would break gcc on systems where it needs fixed includes.
case "$ac_im_incroot" in
/usr/include) ;;
*) test -f "$ac_im_incroot/X11/Xos.h" && ac_x_includes=$ac_im_incroot;;
esac
case "$ac_im_usrlibdir" in
/usr/lib | /lib) ;;
*) test -d "$ac_im_usrlibdir" && ac_x_libraries=$ac_im_usrlibdir ;;
esac
fi
cd ..
rm -fr conftestdir
fi
])# _AC_PATH_X_XMKMF
# _AC_PATH_X_DIRECT
# ----------------
# Internal subroutine of AC_PATH_X.
# Set ac_x_includes and/or ac_x_libraries.
AC_DEFUN(_AC_PATH_X_DIRECT,
[if test "$ac_x_includes" = NO; then
# Guess where to find include files, by looking for this one X11 .h file.
test -z "$ac_x_direct_test_include" &&
ac_x_direct_test_include=X11/Intrinsic.h
# First, try using that file with no special directory specified.
AC_TRY_CPP([#include <$ac_x_direct_test_include>],
[# We can compile using X headers with no special include directory.
ac_x_includes=],
[# Look for the header file in a standard set of common directories.
# Check X11 before X11Rn because it is often a symlink to the current release.
for ac_dir in \
/usr/X11/include \
/usr/X11R6/include \
/usr/X11R5/include \
/usr/X11R4/include \
\
/usr/include/X11 \
/usr/include/X11R6 \
/usr/include/X11R5 \
/usr/include/X11R4 \
\
/usr/local/X11/include \
/usr/local/X11R6/include \
/usr/local/X11R5/include \
/usr/local/X11R4/include \
\
/usr/local/include/X11 \
/usr/local/include/X11R6 \
/usr/local/include/X11R5 \
/usr/local/include/X11R4 \
\
/usr/X386/include \
/usr/x386/include \
/usr/XFree86/include/X11 \
\
/usr/include \
/usr/local/include \
/usr/unsupported/include \
/usr/athena/include \
/usr/local/x11r5/include \
/usr/lpp/Xamples/include \
\
/usr/openwin/include \
/usr/openwin/share/include \
; \
do
if test -r "$ac_dir/$ac_x_direct_test_include"; then
ac_x_includes=$ac_dir
break
fi
done])
fi # $ac_x_includes = NO
if test "$ac_x_libraries" = NO; then
# Check for the libraries.
test -z "$ac_x_direct_test_library" && ac_x_direct_test_library=Xt
test -z "$ac_x_direct_test_function" && ac_x_direct_test_function=XtMalloc
# See if we find them without any special options.
# Don't add to $LIBS permanently.
ac_save_LIBS=$LIBS
LIBS="-l$ac_x_direct_test_library $LIBS"
AC_TRY_LINK(, [${ac_x_direct_test_function}()],
[LIBS=$ac_save_LIBS
# We can link X programs with no special library path.
ac_x_libraries=],
[LIBS=$ac_save_LIBS
# First see if replacing the include by lib works.
# Check X11 before X11Rn because it is often a symlink to the current release.
for ac_dir in `echo "$ac_x_includes" | sed s/include/lib/` \
/usr/X11/lib \
/usr/X11R6/lib \
/usr/X11R5/lib \
/usr/X11R4/lib \
\
/usr/lib/X11 \
/usr/lib/X11R6 \
/usr/lib/X11R5 \
/usr/lib/X11R4 \
\
/usr/local/X11/lib \
/usr/local/X11R6/lib \
/usr/local/X11R5/lib \
/usr/local/X11R4/lib \
\
/usr/local/lib/X11 \
/usr/local/lib/X11R6 \
/usr/local/lib/X11R5 \
/usr/local/lib/X11R4 \
\
/usr/X386/lib \
/usr/x386/lib \
/usr/XFree86/lib/X11 \
\
/usr/lib \
/usr/local/lib \
/usr/unsupported/lib \
/usr/athena/lib \
/usr/local/x11r5/lib \
/usr/lpp/Xamples/lib \
/lib/usr/lib/X11 \
\
/usr/openwin/lib \
/usr/openwin/share/lib \
; \
do
dnl Don't even attempt the hair of trying to link an X program!
for ac_extension in a so sl; do
if test -r $ac_dir/lib${ac_x_direct_test_library}.$ac_extension; then
ac_x_libraries=$ac_dir
break 2
fi
done
done])
fi # $ac_x_libraries = NO
])# _AC_PATH_X_DIRECT
# AC_PATH_XTRA
# ------------
# Find additional X libraries, magic flags, etc.
AC_DEFUN(AC_PATH_XTRA,
[AC_REQUIRE([AC_PATH_X])dnl
if test "$no_x" = yes; then
# Not all programs may use this symbol, but it does not hurt to define it.
AC_DEFINE(X_DISPLAY_MISSING, 1,
[Define if the X Window System is missing or not being used.])
X_CFLAGS= X_PRE_LIBS= X_LIBS= X_EXTRA_LIBS=
else
if test -n "$x_includes"; then
X_CFLAGS="$X_CFLAGS -I$x_includes"
fi
# It would also be nice to do this for all -L options, not just this one.
if test -n "$x_libraries"; then
X_LIBS="$X_LIBS -L$x_libraries"
dnl FIXME: banish uname from this macro!
# For Solaris; some versions of Sun CC require a space after -R and
# others require no space. Words are not sufficient . . . .
case "`(uname -sr) 2>/dev/null`" in
"SunOS 5"*)
AC_MSG_CHECKING(whether -R must be followed by a space)
ac_xsave_LIBS=$LIBS; LIBS="$LIBS -R$x_libraries"
AC_LINK_IFELSE([], ac_R_nospace=yes, ac_R_nospace=no)
if test $ac_R_nospace = yes; then
AC_MSG_RESULT(no)
X_LIBS="$X_LIBS -R$x_libraries"
else
LIBS="$ac_xsave_LIBS -R $x_libraries"
AC_LINK_IFELSE([], ac_R_space=yes, ac_R_space=no)
if test $ac_R_space = yes; then
AC_MSG_RESULT(yes)
X_LIBS="$X_LIBS -R $x_libraries"
else
AC_MSG_RESULT(neither works)
fi
fi
LIBS=$ac_xsave_LIBS
esac
fi
# Check for system-dependent libraries X programs must link with.
# Do this before checking for the system-independent R6 libraries
# (-lICE), since we may need -lsocket or whatever for X linking.
if test "$ISC" = yes; then
X_EXTRA_LIBS="$X_EXTRA_LIBS -lnsl_s -linet"
else
# Martyn Johnson says this is needed for Ultrix, if the X
# libraries were built with DECnet support. And Karl Berry says
# the Alpha needs dnet_stub (dnet does not exist).
AC_CHECK_LIB(dnet, dnet_ntoa, [X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet"])
if test $ac_cv_lib_dnet_dnet_ntoa = no; then
AC_CHECK_LIB(dnet_stub, dnet_ntoa,
[X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet_stub"])
fi
# msh@cis.ufl.edu says -lnsl (and -lsocket) are needed for his 386/AT,
# to get the SysV transport functions.
# Chad R. Larson says the Pyramis MIS-ES running DC/OSx (SVR4)
# needs -lnsl.
# The nsl library prevents programs from opening the X display
# on Irix 5.2, according to T.E. Dickey.
# The functions gethostbyname, getservbyname, and inet_addr are
# in -lbsd on LynxOS 3.0.1/i386, according to Lars Hecking.
AC_CHECK_FUNC(gethostbyname)
if test $ac_cv_func_gethostbyname = no; then
AC_CHECK_LIB(nsl, gethostbyname, X_EXTRA_LIBS="$X_EXTRA_LIBS -lnsl")
if test $ac_cv_lib_nsl_gethostbyname = no; then
AC_CHECK_LIB(bsd, gethostbyname, X_EXTRA_LIBS="$X_EXTRA_LIBS -lbsd")
fi
fi
# lieder@skyler.mavd.honeywell.com says without -lsocket,
# socket/setsockopt and other routines are undefined under SCO ODT
# 2.0. But -lsocket is broken on IRIX 5.2 (and is not necessary
# on later versions), says Simon Leinen: it contains gethostby*
# variants that don't use the nameserver (or something). -lsocket
# must be given before -lnsl if both are needed. We assume that
# if connect needs -lnsl, so does gethostbyname.
AC_CHECK_FUNC(connect)
if test $ac_cv_func_connect = no; then
AC_CHECK_LIB(socket, connect, X_EXTRA_LIBS="-lsocket $X_EXTRA_LIBS", ,
$X_EXTRA_LIBS)
fi
# Guillermo Gomez says -lposix is necessary on A/UX.
AC_CHECK_FUNC(remove)
if test $ac_cv_func_remove = no; then
AC_CHECK_LIB(posix, remove, X_EXTRA_LIBS="$X_EXTRA_LIBS -lposix")
fi
# BSDI BSD/OS 2.1 needs -lipc for XOpenDisplay.
AC_CHECK_FUNC(shmat)
if test $ac_cv_func_shmat = no; then
AC_CHECK_LIB(ipc, shmat, X_EXTRA_LIBS="$X_EXTRA_LIBS -lipc")
fi
fi
# Check for libraries that X11R6 Xt/Xaw programs need.
ac_save_LDFLAGS=$LDFLAGS
test -n "$x_libraries" && LDFLAGS="$LDFLAGS -L$x_libraries"
# SM needs ICE to (dynamically) link under SunOS 4.x (so we have to
# check for ICE first), but we must link in the order -lSM -lICE or
# we get undefined symbols. So assume we have SM if we have ICE.
# These have to be linked with before -lX11, unlike the other
# libraries we check for below, so use a different variable.
# John Interrante, Karl Berry
AC_CHECK_LIB(ICE, IceConnectionNumber,
[X_PRE_LIBS="$X_PRE_LIBS -lSM -lICE"], , $X_EXTRA_LIBS)
LDFLAGS=$ac_save_LDFLAGS
fi
AC_SUBST(X_CFLAGS)dnl
AC_SUBST(X_PRE_LIBS)dnl
AC_SUBST(X_LIBS)dnl
AC_SUBST(X_EXTRA_LIBS)dnl
])# AC_PATH_XTRA
## ------------------------------------ ##
## Checks for not-quite-Unix variants. ##
## ------------------------------------ ##
# The old Cygwin32 macro is deprecated.
AU_DEFUN(AC_CYGWIN32,
[AC_CYGWIN])
# AC_CYGWIN
# ---------
# Check for Cygwin. This is a way to set the right value for
# EXEEXT.
AC_DEFUN(AC_CYGWIN,
[AC_CACHE_CHECK(for Cygwin environment, ac_cv_cygwin,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
[#ifndef __CYGWIN__
# define __CYGWIN__ __CYGWIN32__
#endif
return __CYGWIN__;])],
[ac_cv_cygwin=yes],
[ac_cv_cygwin=no])])
CYGWIN=
test "$ac_cv_cygwin" = yes && CYGWIN=yes])
# AC_MINGW32
# ----------
# Check for mingw32. This is another way to set the right value for
# EXEEXT.
AC_DEFUN(AC_MINGW32,
[AC_CACHE_CHECK(for mingw32 environment, ac_cv_mingw32,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [return __MINGW32__;])],
[ac_cv_mingw32=yes],
[ac_cv_mingw32=no])])
MINGW32=
test "$ac_cv_mingw32" = yes && MINGW32=yes])
# AC_EMXOS2
# ---------
# Check for EMX on OS/2. This is another way to set the right value
# for EXEEXT.
AC_DEFUN(AC_EMXOS2,
[AC_CACHE_CHECK(for EMX OS/2 environment, ac_cv_emxos2,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [return __EMX__;])],
[ac_cv_emxos2=yes],
[ac_cv_emxos2=no])])
EMXOS2=
test "$ac_cv_emxos2" = yes && EMXOS2=yes])
# AC_EXEEXT
# ---------
# Check for the extension used for executables. This knows that we
# add .exe for Cygwin or mingw32. Otherwise, it compiles a test
# executable. If this is called, the executable extensions will be
# automatically used by link commands run by the configure script.
AC_DEFUN(AC_EXEEXT,
[AC_REQUIRE([AC_CYGWIN])dnl
AC_REQUIRE([AC_MINGW32])dnl
AC_REQUIRE([AC_EMXOS2])dnl
AC_MSG_CHECKING([for executable suffix])
AC_CACHE_VAL(ac_cv_exeext,
[if test "$CYGWIN" = yes || test "$MINGW32" = yes || test "$EMXOS2" = yes; then
ac_cv_exeext=.exe
else
rm -f conftest*
echo 'int main () { return 0; }' >conftest.$ac_ext
ac_cv_exeext=
if AC_TRY_EVAL(ac_link); then
for ac_file in conftest.*; do
case $ac_file in
*.c | *.C | *.o | *.obj | *.xcoff) ;;
*) ac_cv_exeext=`echo $ac_file | sed -e s/conftest//` ;;
esac
done
else
AC_MSG_ERROR([installation or configuration problem: compiler cannot create executables.])
fi
rm -f conftest*
test x"${ac_cv_exeext}" = x && ac_cv_exeext=no
fi])
EXEEXT=""
test x"${ac_cv_exeext}" != xno && EXEEXT=${ac_cv_exeext}
AC_MSG_RESULT(${ac_cv_exeext})
dnl Setting ac_exeext will implicitly change the ac_link command.
ac_exeext=$EXEEXT
AC_SUBST(EXEEXT)dnl
])# AC_EXEEXT
# AC_OBJEXT
# ---------
# Check the object extension used by the compiler: typically .o or
# .obj. If this is called, some other behaviour will change,
# determined by ac_objext.
AC_DEFUN(AC_OBJEXT,
[AC_MSG_CHECKING([for object suffix])
AC_CACHE_VAL(ac_cv_objext,
[rm -f conftest*
echo 'int i = 1;' >conftest.$ac_ext
if AC_TRY_EVAL(ac_compile); then
for ac_file in conftest.*; do
case $ac_file in
*.c) ;;
*) ac_cv_objext=`echo $ac_file | sed -e s/conftest.//` ;;
esac
done
else
AC_MSG_ERROR([installation or configuration problem; compiler does not work])
fi
rm -f conftest*])
AC_MSG_RESULT($ac_cv_objext)
OBJEXT=$ac_cv_objext
ac_objext=$ac_cv_objext
AC_SUBST(OBJEXT)])
## -------------------------- ##
## Checks for UNIX variants. ##
## -------------------------- ##
# These are kludges which should be replaced by a single POSIX check.
# They aren't cached, to discourage their use.
# AC_AIX
# ------
AC_DEFUN(AC_AIX,
[AH_VERBATIM([_ALL_SOURCE],
[/* Define if on AIX 3.
System headers sometimes define this.
We just want to avoid a redefinition error message. */
#ifndef _ALL_SOURCE
# undef _ALL_SOURCE
#endif])dnl
AC_BEFORE([$0], [AC_TRY_COMPILE])dnl
AC_BEFORE([$0], [AC_TRY_RUN])dnl
AC_MSG_CHECKING(for AIX)
AC_EGREP_CPP(yes,
[#ifdef _AIX
yes
#endif
],
[AC_MSG_RESULT(yes)
AC_DEFINE(_ALL_SOURCE)],
AC_MSG_RESULT(no))
])# AC_AIX
# AC_MINIX
# --------
AC_DEFUN(AC_MINIX,
[AC_BEFORE([$0], [AC_TRY_COMPILE])dnl
AC_BEFORE([$0], [AC_TRY_RUN])dnl
AC_CHECK_HEADER(minix/config.h, MINIX=yes, MINIX=)
if test "$MINIX" = yes; then
AC_DEFINE(_POSIX_SOURCE, 1,
[Define if you need to in order for `stat' and other things to
work.])
AC_DEFINE(_POSIX_1_SOURCE, 2,
[Define if the system does not provide POSIX.1 features except
with this defined.])
AC_DEFINE(_MINIX, 1,
[Define if on MINIX.])
fi
])# AC_MINIX
# AC_ISC_POSIX
# ------------
AC_DEFUN(AC_ISC_POSIX,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_BEFORE([$0], [AC_TRY_COMPILE])dnl
AC_BEFORE([$0], [AC_TRY_RUN])dnl
AC_MSG_CHECKING(for POSIXized ISC)
if test -d /etc/conf/kconfig.d &&
grep _POSIX_VERSION [/usr/include/sys/unistd.h] >/dev/null 2>&1
then
AC_MSG_RESULT(yes)
ISC=yes # If later tests want to check for ISC.
AC_DEFINE(_POSIX_SOURCE, 1,
[Define if you need to in order for stat and other things to
work.])
if test "$GCC" = yes; then
CC="$CC -posix"
else
CC="$CC -Xp"
fi
else
AC_MSG_RESULT(no)
ISC=
fi
])# AC_ISC_POSIX
AC_DEFUNCT(AC_XENIX_DIR, [; instead use AC_HEADER_DIRENT])
AC_DEFUNCT(AC_DYNIX_SEQ, [; instead use AC_FUNC_GETMNTENT])
AC_DEFUNCT(AC_IRIX_SUN,
[; instead use AC_FUNC_GETMNTENT or AC_CHECK_LIB(sun, getpwnam)])
AC_DEFUNCT(AC_SCO_INTL, [; instead use AC_FUNC_STRFTIME])
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