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c865483335
* acgeneral.m4: Likewise. * aclang.m4: Likewise. * acspecific.m4: Likewise. * libm4.m4: Likewise.
1591 lines
45 KiB
Plaintext
1591 lines
45 KiB
Plaintext
# This file is part of Autoconf. -*- Autoconf -*-
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# Checking for functions.
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# Copyright (C) 2000
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# Free Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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#
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# As a special exception, the Free Software Foundation gives unlimited
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# permission to copy, distribute and modify the configure scripts that
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# are the output of Autoconf. You need not follow the terms of the GNU
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# General Public License when using or distributing such scripts, even
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# though portions of the text of Autoconf appear in them. The GNU
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# General Public License (GPL) does govern all other use of the material
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# that constitutes the Autoconf program.
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#
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# Certain portions of the Autoconf source text are designed to be copied
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# (in certain cases, depending on the input) into the output of
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# Autoconf. We call these the "data" portions. The rest of the Autoconf
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# source text consists of comments plus executable code that decides which
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# of the data portions to output in any given case. We call these
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# comments and executable code the "non-data" portions. Autoconf never
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# copies any of the non-data portions into its output.
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#
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# This special exception to the GPL applies to versions of Autoconf
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# released by the Free Software Foundation. When you make and
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# distribute a modified version of Autoconf, you may extend this special
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# exception to the GPL to apply to your modified version as well, *unless*
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# your modified version has the potential to copy into its output some
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# of the text that was the non-data portion of the version that you started
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# with. (In other words, unless your change moves or copies text from
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# the non-data portions to the data portions.) If your modification has
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# such potential, you must delete any notice of this special exception
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# to the GPL from your modified version.
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#
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# Written by David MacKenzie, with help from
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# Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
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# Roland McGrath, Noah Friedman, david d zuhn, and many others.
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# Table of contents
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#
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# 1. Generic tests for functions.
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# 2. Tests for specific functions.
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## -------------------------------- ##
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## 1. Generic tests for functions. ##
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## -------------------------------- ##
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# AC_CHECK_FUNC(FUNCTION, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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# -----------------------------------------------------------------
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AC_DEFUN([AC_CHECK_FUNC],
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[AC_VAR_PUSHDEF([ac_var], [ac_cv_func_$1])dnl
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AC_CACHE_CHECK([for $1], ac_var,
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[AC_LINK_IFELSE([AC_LANG_FUNC_LINK_TRY([$1])],
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[AC_VAR_SET(ac_var, yes)],
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[AC_VAR_SET(ac_var, no)])])
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AC_SHELL_IFELSE([test AC_VAR_GET(ac_var) = yes],
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[$2], [$3])dnl
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AC_VAR_POPDEF([ac_var])dnl
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])# AC_CHECK_FUNC
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# AC_CHECK_FUNCS(FUNCTION..., [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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# ---------------------------------------------------------------------
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AC_DEFUN([AC_CHECK_FUNCS],
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[AC_FOREACH([AC_Func], [$1],
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[AH_TEMPLATE(AC_TR_CPP(HAVE_[]AC_Func),
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[Define if you have the `]AC_Func[' function.])])dnl
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for ac_func in $1
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do
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AC_CHECK_FUNC($ac_func,
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[AC_DEFINE_UNQUOTED(AC_TR_CPP(HAVE_$ac_func)) $2],
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[$3])dnl
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done
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])
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# AC_REPLACE_FUNCS(FUNCTION...)
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# -----------------------------
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AC_DEFUN([AC_REPLACE_FUNCS],
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[AC_FOREACH([AC_Func], [$1], [AC_LIBOBJ_DECL(AC_Func)])dnl
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AC_CHECK_FUNCS([$1], , [_AC_LIBOBJ($ac_func)])
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])
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# AU::AC_FUNC_CHECK
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# -----------------
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AU_ALIAS([AC_FUNC_CHECK], [AC_CHECK_FUNC])
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# AU::AC_HAVE_FUNCS
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# -----------------
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AU_ALIAS([AC_HAVE_FUNCS], [AC_CHECK_FUNCS])
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## --------------------------------- ##
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## 2. Tests for specific functions. ##
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## --------------------------------- ##
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# The macros are sorted:
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#
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# 1. AC_FUNC_* macros are sorted by alphabetical order.
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#
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# 2. Helping macros such as _AC_LIBOBJ_* are before the macro that
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# uses it.
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#
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# 3. Obsolete macros are right after the modern macro.
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# _AC_LIBOBJ_ALLOCA
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# -----------------
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# Set up the LIBOBJ replacement of `alloca'. Well, not exactly
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# AC_LIBOBJ since we actually set the output variable `ALLOCA'.
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# Nevertheless, for Automake, AC_LIBOBJ_DECL it.
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define([_AC_LIBOBJ_ALLOCA],
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[# The SVR3 libPW and SVR4 libucb both contain incompatible functions
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# that cause trouble. Some versions do not even contain alloca or
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# contain a buggy version. If you still want to use their alloca,
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# use ar to extract alloca.o from them instead of compiling alloca.c.
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AC_LIBOBJ_DECL(alloca)
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AC_SUBST(ALLOCA, alloca.$ac_objext)dnl
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AC_DEFINE(C_ALLOCA, 1, [Define if using `alloca.c'.])
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AC_CACHE_CHECK(whether `alloca.c' needs Cray hooks, ac_cv_os_cray,
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[AC_EGREP_CPP(webecray,
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[#if defined(CRAY) && ! defined(CRAY2)
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webecray
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#else
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wenotbecray
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#endif
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], ac_cv_os_cray=yes, ac_cv_os_cray=no)])
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if test $ac_cv_os_cray = yes; then
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for ac_func in _getb67 GETB67 getb67; do
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AC_CHECK_FUNC($ac_func,
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[AC_DEFINE_UNQUOTED(CRAY_STACKSEG_END, $ac_func,
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[Define to one of `_getb67', `GETB67',
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`getb67' for Cray-2 and Cray-YMP
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systems. This function is required for
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`alloca.c' support on those systems.])
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break])
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done
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fi
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AC_CACHE_CHECK(stack direction for C alloca, ac_cv_c_stack_direction,
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[AC_TRY_RUN(
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[int
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find_stack_direction ()
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{
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static char *addr = 0;
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auto char dummy;
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if (addr == 0)
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{
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addr = &dummy;
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return find_stack_direction ();
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}
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else
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return (&dummy > addr) ? 1 : -1;
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}
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int
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main ()
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{
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exit (find_stack_direction () < 0);
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}], ac_cv_c_stack_direction=1, ac_cv_c_stack_direction=-1,
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ac_cv_c_stack_direction=0)])
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AH_VERBATIM([STACK_DIRECTION],
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[/* If using the C implementation of alloca, define if you know the
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direction of stack growth for your system; otherwise it will be
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automatically deduced at run-time.
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STACK_DIRECTION > 0 => grows toward higher addresses
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STACK_DIRECTION < 0 => grows toward lower addresses
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STACK_DIRECTION = 0 => direction of growth unknown */
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@%:@undef STACK_DIRECTION])dnl
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AC_DEFINE_UNQUOTED(STACK_DIRECTION, $ac_cv_c_stack_direction)
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])# _AC_LIBOBJ_ALLOCA
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# AC_FUNC_ALLOCA
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# --------------
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AC_DEFUN([AC_FUNC_ALLOCA],
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[AC_REQUIRE_CPP()dnl Set CPP; we run AC_EGREP_CPP conditionally.
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# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
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# for constant arguments. Useless!
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AC_CACHE_CHECK([for working alloca.h], ac_cv_working_alloca_h,
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[AC_TRY_LINK([@%:@include <alloca.h>],
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[char *p = (char *) alloca (2 * sizeof (int));],
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ac_cv_working_alloca_h=yes, ac_cv_working_alloca_h=no)])
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if test $ac_cv_working_alloca_h = yes; then
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AC_DEFINE(HAVE_ALLOCA_H, 1,
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[Define if you have <alloca.h> and it should be used
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(not on Ultrix).])
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fi
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AC_CACHE_CHECK([for alloca], ac_cv_func_alloca_works,
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[AC_TRY_LINK(
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[#ifdef __GNUC__
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# define alloca __builtin_alloca
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#else
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# ifdef _MSC_VER
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# include <malloc.h>
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# define alloca _alloca
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# else
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# if HAVE_ALLOCA_H
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# include <alloca.h>
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# else
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# ifdef _AIX
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#pragma alloca
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# else
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# ifndef alloca /* predefined by HP cc +Olibcalls */
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char *alloca ();
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# endif
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# endif
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# endif
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# endif
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#endif
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], [char *p = (char *) alloca (1);],
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ac_cv_func_alloca_works=yes, ac_cv_func_alloca_works=no)])
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if test $ac_cv_func_alloca_works = yes; then
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AC_DEFINE(HAVE_ALLOCA, 1,
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[Define if you have `alloca', as a function or macro.])
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else
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_AC_LIBOBJ_ALLOCA
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fi
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])# AC_FUNC_ALLOCA
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# AU::AC_ALLOCA
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# -------------
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AU_ALIAS([AC_ALLOCA], [AC_FUNC_ALLOCA])
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# AC_FUNC_CHOWN
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# -------------
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# Determine whether chown accepts arguments of -1 for uid and gid.
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AC_DEFUN([AC_FUNC_CHOWN],
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[AC_REQUIRE([AC_TYPE_UID_T])dnl
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AC_CHECK_HEADERS(unistd.h)
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AC_CACHE_CHECK([for working chown], ac_cv_func_chown_works,
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[AC_TRY_RUN([
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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int
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main ()
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{
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char *f = "conftestchown";
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struct stat before, after;
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if (creat (f, 0600) < 0)
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exit (1);
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if (stat (f, &before) < 0)
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exit (1);
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if (chown (f, (uid_t) -1, (gid_t) -1) == -1)
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exit (1);
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if (stat (f, &after) < 0)
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exit (1);
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exit ((before.st_uid == after.st_uid
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&& before.st_gid == after.st_gid) ? 0 : 1);
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}],
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ac_cv_func_chown_works=yes,
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ac_cv_func_chown_works=no,
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ac_cv_func_chown_works=no)])
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if test $ac_cv_func_chown_works = yes; then
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AC_DEFINE(HAVE_CHOWN, 1,
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[Define if your system has a working `chown' function.])
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fi
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])# AC_FUNC_CHOWN
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# AC_FUNC_CLOSEDIR_VOID
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# ---------------------
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# Check whether closedir returns void, and #define CLOSEDIR_VOID in
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# that case.
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AC_DEFUN([AC_FUNC_CLOSEDIR_VOID],
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[AC_REQUIRE([AC_HEADER_DIRENT])dnl
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AC_CACHE_CHECK(whether closedir returns void, ac_cv_func_closedir_void,
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[AC_TRY_RUN(
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[#include <sys/types.h>
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#include <$ac_header_dirent>
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int closedir ();
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int
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main ()
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{
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exit (closedir (opendir (".")) != 0);
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}],
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ac_cv_func_closedir_void=no,
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ac_cv_func_closedir_void=yes,
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ac_cv_func_closedir_void=yes)])
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if test $ac_cv_func_closedir_void = yes; then
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AC_DEFINE(CLOSEDIR_VOID, 1,
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[Define if the `closedir' function returns void instead of `int'.])
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fi
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])
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# AC_FUNC_ERROR_AT_LINE
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# ---------------------
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AC_DEFUN([AC_FUNC_ERROR_AT_LINE],
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[AC_CACHE_CHECK([for error_at_line], ac_cv_lib_error_at_line,
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[AC_TRY_LINK([],[error_at_line (0, 0, "", 0, "");],
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ac_cv_lib_error_at_line=yes,
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ac_cv_lib_error_at_line=no)])
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if test $ac_cv_lib_error_at_line = no; then
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AC_LIBOBJ(error)
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fi
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])
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# AU::AM_FUNC_ERROR_AT_LINE
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# -------------------------
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# FIXME: Because Automake macros are defined with their name unquoted,
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# we can't yet provide the Autoupdate glue.
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# AU_ALIAS([AM_FUNC_ERROR_AT_LINE], [AC_FUNC_ERROR_AT_LINE])
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# AC_FUNC_FNMATCH
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# ---------------
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# We look for fnmatch.h to avoid that the test fails in C++.
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AC_DEFUN([AC_FUNC_FNMATCH],
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[AC_CHECK_HEADERS(fnmatch.h)
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AC_CACHE_CHECK(for working fnmatch, ac_cv_func_fnmatch_works,
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# Some versions of Solaris or SCO have a broken fnmatch function.
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# So we run a test program. If we are cross-compiling, take no chance.
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# Thanks to John Oleynick and Franc,ois Pinard for this test.
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[AC_TRY_RUN(
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[#if HAVE_FNMATCH_H
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# include <fnmatch.h>
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#endif
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int
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main ()
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{
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exit (fnmatch ("a*", "abc", 0) != 0);
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}],
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ac_cv_func_fnmatch_works=yes, ac_cv_func_fnmatch_works=no,
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ac_cv_func_fnmatch_works=no)])
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if test $ac_cv_func_fnmatch_works = yes; then
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AC_DEFINE(HAVE_FNMATCH, 1,
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[Define if your system has a working `fnmatch' function.])
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fi
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])# AC_FUNC_FNMATCH
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# AU::AM_FUNC_FNMATCH
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# and
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# AU::fp_FUNC_FNMATCH
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# -------------------
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# FIXME: Because Automake macros are defined with their name unquoted,
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# we can't yet provide the Autoupdate glue.
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# AU_ALIAS([AM_FUNC_FNMATCH], [AC_FUNC_FNMATCH])
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AU_ALIAS([fp_FUNC_FNMATCH], [AC_FUNC_FNMATCH])
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# AC_FUNC_GETGROUPS
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# -----------------
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# Try to find `getgroups', and check that it works.
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# When crosscompiling, assume getgroups is broken.
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AC_DEFUN([AC_FUNC_GETGROUPS],
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[AC_REQUIRE([AC_TYPE_GETGROUPS])dnl
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AC_REQUIRE([AC_TYPE_SIZE_T])dnl
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AC_CHECK_FUNC(getgroups)
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# If we don't yet have getgroups, see if it's in -lbsd.
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# This is reported to be necessary on an ITOS 3000WS running SEIUX 3.1.
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ac_save_LIBS=$LIBS
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if test $ac_cv_func_getgroups = no; then
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AC_CHECK_LIB(bsd, getgroups, [GETGROUPS_LIB=-lbsd])
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fi
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# Run the program to test the functionality of the system-supplied
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# getgroups function only if there is such a function.
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if test $ac_cv_func_getgroups = yes; then
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AC_CACHE_CHECK([for working getgroups], ac_cv_func_getgroups_works,
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[AC_TRY_RUN([
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int
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main ()
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{
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/* On Ultrix 4.3, getgroups (0, 0) always fails. */
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exit (getgroups (0, 0) == -1 ? 1 : 0);
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}],
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ac_cv_func_getgroups_works=yes,
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ac_cv_func_getgroups_works=no,
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ac_cv_func_getgroups_works=no)
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])
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if test $ac_cv_func_getgroups_works = yes; then
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AC_DEFINE(HAVE_GETGROUPS, 1,
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[Define if your system has a working `getgroups' function.])
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fi
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fi
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LIBS=$ac_save_LIBS
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])# AC_FUNC_GETGROUPS
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# _AC_LIBOBJ_GETLOADAVG
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# ---------------------
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# Set up the AC_LIBOBJ replacement of `getloadavg'.
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define([_AC_LIBOBJ_GETLOADAVG],
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[AC_LIBOBJ(getloadavg)
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AC_DEFINE(C_GETLOADAVG, 1, [Define if using `getloadavg.c'.])
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# Figure out what our getloadavg.c needs.
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ac_have_func=no
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AC_CHECK_HEADER(sys/dg_sys_info.h,
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[ac_have_func=yes
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AC_DEFINE(DGUX, 1, [Define for DGUX with <sys/dg_sys_info.h>.])
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AC_CHECK_LIB(dgc, dg_sys_info)])
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AC_CHECK_HEADER(locale.h)
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AC_CHECK_FUNCS(setlocale)
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# We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
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# uses stabs), but it is still SVR4. We cannot check for <elf.h> because
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# Irix 4.0.5F has the header but not the library.
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if test $ac_have_func = no && test "$ac_cv_lib_elf_elf_begin" = yes; then
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ac_have_func=yes
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AC_DEFINE(SVR4, 1, [Define on System V Release 4.])
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fi
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if test $ac_have_func = no; then
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AC_CHECK_HEADER(inq_stats/cpustats.h,
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[ac_have_func=yes
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AC_DEFINE(UMAX, 1, [Define for Encore UMAX.])
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AC_DEFINE(UMAX4_3, 1,
|
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[Define for Encore UMAX 4.3 that has <inq_status/cpustats.h>
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instead of <sys/cpustats.h>.])])
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fi
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if test $ac_have_func = no; then
|
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AC_CHECK_HEADER(sys/cpustats.h,
|
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[ac_have_func=yes; AC_DEFINE(UMAX)])
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fi
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if test $ac_have_func = no; then
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AC_CHECK_HEADERS(mach/mach.h)
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fi
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AC_CHECK_HEADERS(nlist.h,
|
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[AC_CHECK_MEMBERS([struct nlist.n_un.n_name],
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[AC_DEFINE(NLIST_NAME_UNION, 1,
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[Define if your `struct nlist' has an
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`n_un' member. Obsolete, depend on
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`HAVE_STRUCT_NLIST_N_UN_N_NAME])], [],
|
|
[@%:@include <nlist.h>])
|
|
])dnl
|
|
])# _AC_LIBOBJ_GETLOADAVG
|
|
|
|
|
|
# AC_FUNC_GETLOADAVG
|
|
# ------------------
|
|
AC_DEFUN([AC_FUNC_GETLOADAVG],
|
|
[ac_have_func=no # yes means we've found a way to get the load average.
|
|
|
|
ac_save_LIBS=$LIBS
|
|
|
|
# Check for getloadavg, but be sure not to touch the cache variable.
|
|
(AC_CHECK_FUNC(getloadavg, exit 0, exit 1)) && ac_have_func=yes
|
|
|
|
# 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.
|
|
if test $ac_have_func = no; then
|
|
AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS")
|
|
fi
|
|
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!$ac_save_LIBS!!"`
|
|
fi
|
|
LIBS=$ac_save_LIBS
|
|
|
|
AC_SUBST(GETLOADAVG_LIBS)dnl
|
|
])# AC_FUNC_GETLOADAVG
|
|
|
|
|
|
# AU::AC_GETLOADAVG
|
|
# -----------------
|
|
AU_ALIAS([AC_GETLOADAVG], [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_LSTAT_FOLLOWS_SLASHED_SYMLINK
|
|
# -------------------------------------
|
|
# When crosscompiling, be pessimistic so we will end up using the
|
|
# replacement version of lstat that checkes for trailing slashes and
|
|
# calls lstat a second time when necessary.
|
|
AC_DEFUN([AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK],
|
|
[AC_CACHE_CHECK(
|
|
[whether lstat dereferences a symlink specified with a trailing slash],
|
|
[ac_cv_func_lstat_dereferences_slashed_symlink],
|
|
[rm -f conftest.sym conftest.file
|
|
echo >conftest.file
|
|
if ln -s conftest.file conftest.sym; then
|
|
AC_TRY_RUN([
|
|
# include <sys/types.h>
|
|
# include <sys/stat.h>
|
|
|
|
int
|
|
main ()
|
|
{
|
|
struct stat sbuf;
|
|
/* Linux will dereference the symlink and fail.
|
|
That is better in the sense that it means we will not
|
|
have to compile and use the lstat wrapper. */
|
|
exit (lstat ("conftest.sym/", &sbuf) ? 0 : 1);
|
|
}
|
|
],
|
|
ac_cv_func_lstat_dereferences_slashed_symlink=yes,
|
|
ac_cv_func_lstat_dereferences_slashed_symlink=no,
|
|
ac_cv_func_lstat_dereferences_slashed_symlink=no
|
|
)
|
|
else
|
|
# If the `ln -s' command failed, then we probably don't even
|
|
# have an lstat function.
|
|
ac_cv_func_lstat_dereferences_slashed_symlink=no
|
|
fi
|
|
])
|
|
|
|
test $ac_cv_func_lstat_dereferences_slashed_symlink = yes &&
|
|
AC_DEFINE_UNQUOTED(LSTAT_FOLLOWS_SLASHED_SYMLINK, 1,
|
|
[Define if `lstat' dereferences a symlink specified
|
|
with a trailing slash.])
|
|
|
|
if test $ac_cv_func_lstat_dereferences_slashed_symlink = no; then
|
|
AC_LIBOBJ(lstat)
|
|
fi
|
|
])
|
|
|
|
|
|
# AC_FUNC_MALLOC
|
|
# --------------
|
|
# Is `malloc (0)' properly handled?
|
|
AC_DEFUN([AC_FUNC_MALLOC],
|
|
[AC_REQUIRE([AC_HEADER_STDC])dnl
|
|
AC_CACHE_CHECK([for working malloc], ac_cv_func_malloc_works,
|
|
[AC_TRY_RUN(
|
|
[#if STDC_HEADERS || HAVE_STDLIB_H
|
|
# include <stdlib.h>
|
|
#else
|
|
char *malloc ();
|
|
#endif
|
|
|
|
int
|
|
main ()
|
|
{
|
|
exit (malloc (0) ? 0 : 1);
|
|
}],
|
|
ac_cv_func_malloc_works=yes,
|
|
ac_cv_func_malloc_works=no,
|
|
ac_cv_func_malloc_works=no)
|
|
])
|
|
if test $ac_cv_func_malloc_works = yes; then
|
|
AC_DEFINE(HAVE_MALLOC, 1,
|
|
[Define if your system has a working `malloc' function.])
|
|
fi
|
|
])# AC_FUNC_MALLOC
|
|
|
|
|
|
# AC_FUNC_MEMCMP
|
|
# --------------
|
|
AC_DEFUN([AC_FUNC_MEMCMP],
|
|
[AC_CACHE_CHECK([for working memcmp], ac_cv_func_memcmp_working,
|
|
[AC_TRY_RUN([
|
|
int
|
|
main ()
|
|
{
|
|
/* Some versions of memcmp are not 8-bit clean. */
|
|
char c0 = 0x40, c1 = 0x80, c2 = 0x81;
|
|
if (memcmp(&c0, &c2, 1) >= 0 || memcmp(&c1, &c2, 1) >= 0)
|
|
exit (1);
|
|
|
|
/* The Next x86 OpenStep bug shows up only when comparing 16 bytes
|
|
or more and with at least one buffer not starting on a 4-byte boundary.
|
|
William Lewis provided this test program. */
|
|
{
|
|
char foo[21];
|
|
char bar[21];
|
|
int i;
|
|
for (i = 0; i < 4; i++)
|
|
{
|
|
char *a = foo + i;
|
|
char *b = bar + i;
|
|
strcpy (a, "--------01111111");
|
|
strcpy (b, "--------10000000");
|
|
if (memcmp (a, b, 16) >= 0)
|
|
exit (1);
|
|
}
|
|
exit (0);
|
|
}
|
|
}]
|
|
ac_cv_func_memcmp_working=yes,
|
|
ac_cv_func_memcmp_working=no,
|
|
ac_cv_func_memcmp_working=no)])
|
|
test $ac_cv_func_memcmp_working = no && AC_LIBOBJ([memcmp])
|
|
])# AC_FUNC_MEMCMP
|
|
|
|
|
|
# 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
|
|
|
|
|
|
# AU::AM_FUNC_MKTIME
|
|
# ------------------
|
|
# FIXME: Because Automake macros are defined with their name unquoted,
|
|
# we can't yet provide the Autoupdate glue.
|
|
# AU_ALIAS([AM_FUNC_MKTIME], [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 STDC_HEADERS || 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
|
|
|
|
|
|
# AU::AC_MMAP
|
|
# -----------
|
|
AU_ALIAS([AC_MMAP], [AC_FUNC_MMAP])
|
|
|
|
|
|
# AC_FUNC_OBSTACK
|
|
# ---------------
|
|
# Ensure obstack support. Yeah, this is not exactly a `FUNC' check.
|
|
AC_DEFUN([AC_FUNC_OBSTACK],
|
|
[AC_CACHE_CHECK([for obstacks], ac_cv_func_obstack,
|
|
[AC_TRY_LINK([@%:@include "obstack.h"],
|
|
[struct obstack *mem;obstack_free(mem,(char *) 0)],
|
|
ac_cv_func_obstack=yes,
|
|
ac_cv_func_obstack=no)])
|
|
if test $ac_cv_func_obstack = yes; then
|
|
AC_DEFINE(HAVE_OBSTACK, 1, [Define if libc includes obstacks.])
|
|
else
|
|
AC_LIBOBJ(obstack)
|
|
fi
|
|
])# AC_FUNC_OBSTACK
|
|
|
|
|
|
# AU::AM_FUNC_OBSTACK
|
|
# -------------------
|
|
# FIXME: Because Automake macros are defined with their name unquoted,
|
|
# we can't yet provide the Autoupdate glue.
|
|
# AU_ALIAS([AM_FUNC_OBSTACK], [AC_FUNC_OBSTACK])
|
|
|
|
|
|
# AC_FUNC_SELECT_ARGTYPES
|
|
# -----------------------
|
|
# Determine the correct type to be passed to each of the `select'
|
|
# function's arguments, and define those types in `SELECT_TYPE_ARG1',
|
|
# `SELECT_TYPE_ARG234', and `SELECT_TYPE_ARG5'.
|
|
AC_DEFUN([AC_FUNC_SELECT_ARGTYPES],
|
|
[AC_CACHE_CHECK([types of arguments for select],
|
|
[ac_cv_func_select_args],
|
|
[for ac_arg234 in 'fd_set *' 'int *' 'void *'; do
|
|
for ac_arg1 in 'int' 'size_t' 'unsigned long' 'unsigned'; do
|
|
for ac_arg5 in 'struct timeval *' 'const struct timeval *'; do
|
|
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
|
|
[#include <sys/types.h>
|
|
#if HAVE_SYS_TIME_H
|
|
# include <sys/time.h>
|
|
#endif
|
|
#if HAVE_SYS_SELECT_H
|
|
# include <sys/select.h>
|
|
#endif
|
|
#if HAVE_SYS_SOCKET_H
|
|
# include <sys/socket.h>
|
|
#endif
|
|
extern int select ($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 "$ac_cv_func_select_args" | sed 's/\*/\*/g'`
|
|
IFS=$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_STAT(STAT | LSTAT)
|
|
# ---------------------------
|
|
# Determine whether stat or lstat have the bug that it succeeds when
|
|
# given the zero-length file name argument. The stat and lstat from
|
|
# SunOS4.1.4 and the Hurd (as of 1998-11-01) do this.
|
|
#
|
|
# If it does, then define HAVE_STAT_EMPTY_STRING_BUG (or
|
|
# HAVE_LSTAT_EMPTY_STRING_BUG) and arrange to compile the wrapper
|
|
# function.
|
|
define([_AC_FUNC_STAT],
|
|
[AC_REQUIRE([AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])dnl
|
|
AC_CACHE_CHECK([whether $1 accepts an empty string],
|
|
[ac_cv_func_$1_empty_string_bug],
|
|
[AC_TRY_RUN(
|
|
[#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
int
|
|
main ()
|
|
{
|
|
struct stat sbuf;
|
|
exit ($1 ("", &sbuf) ? 1 : 0);
|
|
}],
|
|
[ac_cv_func_$1_empty_string_bug=yes],
|
|
[ac_cv_func_$1_empty_string_bug=no],
|
|
[ac_cv_func_$1_empty_string_bug=yes])])
|
|
if test $ac_cv_func_$1_empty_string_bug = yes; then
|
|
AC_LIBOBJ([$1])
|
|
AC_DEFINE_UNQUOTED(AC_TR_CPP([HAVE_$1_EMPTY_STRING_BUG]), 1,
|
|
[Define if `$1' has the bug that it succeeds when
|
|
given the zero-length file name argument.])
|
|
fi
|
|
])# _AC_FUNC_STAT
|
|
|
|
|
|
# AC_FUNC_STAT & AC_FUNC_LSTAT
|
|
# ----------------------------
|
|
AC_DEFUN([AC_FUNC_STAT], [_AC_FUNC_STAT(stat)])
|
|
AC_DEFUN([AC_FUNC_LSTAT], [_AC_FUNC_STAT(lstat)])
|
|
|
|
|
|
# _AC_LIBOBJ_STRTOD
|
|
# -----------------
|
|
define([_AC_LIBOBJ_STRTOD],
|
|
[AC_LIBOBJ(strtod)
|
|
AC_CHECK_FUNC(pow)
|
|
if test $ac_cv_func_pow = no; then
|
|
AC_CHECK_LIB(m, pow,
|
|
[POW_LIB=-lm],
|
|
[AC_MSG_WARN(can't find library containing definition of pow)])
|
|
fi
|
|
])# _AC_LIBOBJ_STRTOD
|
|
|
|
|
|
# AC_FUNC_STRTOD
|
|
# --------------
|
|
AC_DEFUN([AC_FUNC_STRTOD],
|
|
[AC_CACHE_CHECK(for working strtod, ac_cv_func_strtod,
|
|
[AC_TRY_RUN([
|
|
double strtod ();
|
|
int
|
|
main()
|
|
{
|
|
{
|
|
/* Some versions of Linux strtod mis-parse strings with leading '+'. */
|
|
char *string = " +69";
|
|
char *term;
|
|
double value;
|
|
value = strtod (string, &term);
|
|
if (value != 69 || term != (string + 4))
|
|
exit (1);
|
|
}
|
|
|
|
{
|
|
/* Under Solaris 2.4, strtod returns the wrong value for the
|
|
terminating character under some conditions. */
|
|
char *string = "NaN";
|
|
char *term;
|
|
strtod (string, &term);
|
|
if (term != string && *(term - 1) == 0)
|
|
exit (1);
|
|
}
|
|
exit (0);
|
|
}
|
|
],
|
|
ac_cv_func_strtod=yes,
|
|
ac_cv_func_strtod=no,
|
|
ac_cv_func_strtod=no)])
|
|
if test $ac_cv_func_strtod = no; then
|
|
_AC_LIBOBJ_STRTOD
|
|
fi
|
|
])
|
|
|
|
|
|
# AU::AM_FUNC_STRTOD
|
|
# ------------------
|
|
# FIXME: Because Automake macros are defined with their name unquoted,
|
|
# we can't yet provide the Autoupdate glue.
|
|
# AU_ALIAS([AM_FUNC_STRTOD], [AC_FUNC_STRTOD])
|
|
|
|
|
|
# AC_FUNC_STRERROR_R
|
|
# ------------------
|
|
AC_DEFUN([AC_FUNC_STRERROR_R],
|
|
[AC_CHECK_FUNCS([strerror_r])
|
|
if test $ac_cv_func_strerror_r = yes; then
|
|
AC_CHECK_HEADERS(string.h)
|
|
AC_CACHE_CHECK([for working strerror_r],
|
|
ac_cv_func_strerror_r_works,
|
|
[
|
|
AC_TRY_COMPILE(
|
|
[
|
|
# include <stdio.h>
|
|
# if HAVE_STRING_H
|
|
# include <string.h>
|
|
# endif
|
|
],
|
|
[
|
|
char buf;
|
|
char x = *strerror_r (0, &buf, sizeof buf);
|
|
],
|
|
ac_cv_func_strerror_r_works=yes,
|
|
ac_cv_func_strerror_r_works=no
|
|
)])
|
|
if test $ac_cv_func_strerror_r_works = yes; then
|
|
AC_DEFINE_UNQUOTED(HAVE_WORKING_STRERROR_R, 1,
|
|
[Define to 1 if `strerror_r' returns a string.])
|
|
fi
|
|
fi
|
|
])# AC_FUNC_STRERROR_R
|
|
|
|
|
|
# AC_FUNC_STRFTIME
|
|
# ----------------
|
|
AC_DEFUN([AC_FUNC_STRFTIME],
|
|
[AC_CHECK_FUNCS(strftime, [],
|
|
[# strftime is in -lintl on SCO UNIX.
|
|
AC_CHECK_LIB(intl, strftime,
|
|
[AC_DEFINE(HAVE_STRFTIME)
|
|
LIBS="-lintl $LIBS"])])dnl
|
|
])# AC_FUNC_STRFTIME
|
|
|
|
|
|
# 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
|
|
|
|
|
|
# AU::AC_SETVBUF_REVERSED
|
|
# -----------------------
|
|
AU_ALIAS([AC_SETVBUF_REVERSED], [AC_FUNC_SETVBUF_REVERSED])
|
|
|
|
|
|
# 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
|
|
|
|
|
|
# AU::AC_STRCOLL
|
|
# --------------
|
|
AU_ALIAS([AC_STRCOLL], [AC_FUNC_STRCOLL])
|
|
|
|
|
|
# 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
|
|
|
|
|
|
# AU::AC_UTIME_NULL
|
|
# -----------------
|
|
AU_ALIAS([AC_UTIME_NULL], [AC_FUNC_UTIME_NULL])
|
|
|
|
|
|
# AC_FUNC_VFORK
|
|
# -------------
|
|
AC_DEFUN([AC_FUNC_VFORK],
|
|
[AC_REQUIRE([AC_TYPE_PID_T])dnl
|
|
AC_CHECK_HEADERS(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
|
|
|
|
|
|
# AU::AC_VFORK
|
|
# ------------
|
|
AU_ALIAS([AC_VFORK], [AC_FUNC_VFORK])
|
|
|
|
|
|
# AC_FUNC_VPRINTF
|
|
# ---------------
|
|
# Why the heck is that _doprnt does not define HAVE__DOPRNT???
|
|
# That the logical name!
|
|
AC_DEFUN([AC_FUNC_VPRINTF],
|
|
[AC_CHECK_FUNCS(vprintf, []
|
|
[AC_CHECK_FUNC(_doprnt,
|
|
[AC_DEFINE(HAVE_DOPRNT, 1,
|
|
[Define if you don't have `vprintf' but do have
|
|
`_doprnt.'])])])
|
|
])
|
|
|
|
|
|
# AU::AC_VPRINTF
|
|
# --------------
|
|
AU_ALIAS([AC_VPRINTF], [AC_FUNC_VPRINTF])
|
|
|
|
|
|
# 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
|
|
|
|
|
|
# AU::AC_WAIT3
|
|
# ------------
|
|
AU_ALIAS([AC_WAIT3], [AC_FUNC_WAIT3])
|