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1384 lines
40 KiB
Plaintext
1384 lines
40 KiB
Plaintext
dnl Macros that test for specific features.
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dnl This file is part of Autoconf.
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dnl Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
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dnl
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dnl This program is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU General Public License as published by
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dnl the Free Software Foundation; either version 2, or (at your option)
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dnl any later version.
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dnl
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dnl This program is distributed in the hope that it will be useful,
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dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
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dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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dnl GNU General Public License for more details.
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dnl
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dnl You should have received a copy of the GNU General Public License
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dnl along with this program; if not, write to the Free Software
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dnl Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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dnl
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dnl Written by David MacKenzie, with help from
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dnl Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
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dnl Roland McGrath, and Noah Friedman.
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dnl
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dnl
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dnl checks for programs
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dnl
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dnl
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define(AC_PROG_CC,
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[AC_BEFORE([$0], [AC_PROG_CPP])AC_PROVIDE([$0])AC_PROGRAM_CHECK(CC, gcc, gcc, cc)
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# Find out if we are using GNU C, under whatever name.
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cat > conftest.c <<EOF
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#ifdef __GNUC__
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yes
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#endif
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EOF
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${CC-cc} -E conftest.c > conftest.out 2>&1
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if egrep yes conftest.out >/dev/null 2>&1; then
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GCC=1 # For later tests.
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fi
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rm -f conftest*
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])dnl
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dnl
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define(AC_PROG_CXX,
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[AC_BEFORE([$0], [AC_PROG_CXXCPP])AC_PROVIDE([$0])AC_PROGRAMS_CHECK(CXX, $CCC c++ g++ gcc CC, gcc)
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# Find out if we are using GNU C++, under whatever name.
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cat > conftest.C <<EOF
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#ifdef __GNUC__
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yes
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#endif
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EOF
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${CXX-gcc} -E conftest.C > conftest.out 2>&1
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if egrep yes conftest.out >/dev/null 2>&1; then
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GXX=1 # For later tests.
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fi
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rm -f conftest*
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])dnl
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dnl
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define(AC_GCC_TRADITIONAL,
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[AC_REQUIRE([AC_PROG_CC])AC_REQUIRE([AC_PROG_CPP])if test -n "$GCC"; then
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AC_CHECKING(whether -traditional is needed)
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changequote(,)dnl
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ac_pattern="Autoconf.*'x'"
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changequote([,])dnl
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ac_prog='#include <sgtty.h>
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Autoconf TIOCGETP'
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AC_PROGRAM_EGREP($ac_pattern, $ac_prog, ac_need_trad=1)
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if test -z "$ac_need_trad"; then
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ac_prog='#include <termio.h>
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Autoconf TCGETA'
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AC_PROGRAM_EGREP($ac_pattern, $ac_prog, ac_need_trad=1)
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fi
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test -n "$ac_need_trad" && CC="$CC -traditional"
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fi
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])dnl
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dnl
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define(AC_MINUS_C_MINUS_O,
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[AC_CHECKING(whether $CC and cc understand -c and -o together)
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echo 'foo(){}' > conftest.c
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# Make sure it works both with $CC and with simple cc.
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# We do the test twice because some compilers refuse to overwrite an
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# existing .o file with -o, though they will create one.
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if ${CC-cc} -c conftest.c -o conftest.o >/dev/null 2>&1 \
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&& test -f conftest.o && ${CC-cc} -c conftest.c -o conftest.o >/dev/null 2>&1
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then
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# Test first that cc exists at all.
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if cc -c conftest.c >/dev/null 2>&1
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then
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if cc -c conftest.c -o conftest2.o >/dev/null 2>&1 && \
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test -f conftest2.o && cc -c conftest.c -o conftest2.o >/dev/null 2>&1
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then
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:
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else
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AC_DEFINE(NO_MINUS_C_MINUS_O)
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fi
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fi
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else
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AC_DEFINE(NO_MINUS_C_MINUS_O)
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fi
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rm -f conftest*
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])dnl
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dnl
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dnl Define SET_MAKE to set ${MAKE} if make doesn't.
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define(AC_SET_MAKE,
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[cat > conftestmake <<'EOF'
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all:
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@echo 'ac_maketemp="${MAKE}"'
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EOF
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changequote(,)dnl
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# GNU make sometimes prints "make[1]: Entering...", which would confuse us.
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eval `${MAKE-make} -f conftestmake 2>/dev/null | grep temp=`
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changequote([,])dnl
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if test -n "$ac_maketemp"; then SET_MAKE=
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else SET_MAKE="MAKE=${MAKE-make}"; fi
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AC_SUBST([SET_MAKE])dnl
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])dnl
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dnl
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define(AC_PROG_RANLIB, [AC_PROGRAM_CHECK(RANLIB, ranlib, ranlib, :)])dnl
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dnl
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define(AC_PROG_AWK, [AC_PROGRAMS_CHECK(AWK, mawk gawk nawk awk,)])dnl
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dnl
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define(AC_PROG_YACC,[AC_PROGRAMS_CHECK(YACC, 'bison -y' byacc, yacc)])dnl
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dnl
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define(AC_PROG_CPP,
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[AC_PROVIDE([$0])AC_CHECKING(how to run the C preprocessor)
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if test -z "$CPP"; then
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# This must be in double quotes, not single quotes, because CPP may get
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# substituted into the Makefile and ``${CC-cc}'' will simply confuse
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# make. It must be expanded now.
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CPP="${CC-cc} -E"
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dnl On the NeXT, cc -E runs the code through the compiler's parser,
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dnl not just through cpp.
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AC_TEST_CPP([#include <stdio.h>
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Syntax Error], ,
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CPP="${CC-cc} -E -traditional-cpp"
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AC_TEST_CPP([#include <stdio.h>
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Syntax Error], ,CPP=/lib/cpp))
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fi
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AC_VERBOSE(setting CPP to $CPP)
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AC_SUBST(CPP)dnl
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])dnl
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dnl
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define(AC_PROG_CXXCPP,
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[AC_PROVIDE([$0])AC_CHECKING(how to run the C++ preprocessor)
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AC_LANG_SAVE[]dnl
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AC_LANG_CPLUSPLUS[]dnl
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if test -z "$CXXCPP"; then
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CXXCPP="${CXX-c++} -E"
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AC_TEST_CPP([#include <stdlib.h>], , CXXCPP=/lib/cpp)
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fi
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AC_VERBOSE(setting CXXCPP to $CXXCPP)
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AC_LANG_RESTORE[]dnl
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AC_SUBST(CXXCPP)dnl
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])dnl
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dnl
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dnl Require finding the C or C++ preprocessor, whichever is the
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dnl current language.
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define(AC_REQUIRE_CPP,
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[ifelse(AC_LANG,C,[AC_REQUIRE([AC_PROG_CPP])],[AC_REQUIRE([AC_PROG_CXXCPP])])])dnl
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dnl
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define(AC_PROG_LEX,
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[AC_PROVIDE([$0])AC_PROGRAM_CHECK(LEX, flex, flex, lex)
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if test -z "$LEXLIB"
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then
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case "$LEX" in
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flex*) AC_HAVE_LIBRARY(fl, LEXLIB="-lfl") ;;
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*) LEXLIB="-ll" ;;
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esac
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fi
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AC_SUBST(LEXLIB)])dnl
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dnl
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define(AC_DECLARE_YYTEXT,
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[AC_REQUIRE_CPP()AC_REQUIRE([AC_PROG_LEX])dnl
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errprint(warning: [$0] is currently broken due to a quoting quagmire
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)dnl
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AC_CHECKING(how to declare yytext)
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# Figure out what yytext is by creating a minimal parser and
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# examining the (preprocessed, in case macros are used) output.
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if test "z${DECLARE_YYTEXT}" = "z"; then
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changequote(,)dnl
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echo '%%
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%%' | ${LEX}
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if test -f lex.yy.c; then
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LEX_OUTPUT_ROOT=lex.yy
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elif test -f lexyy.c; then
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LEX_OUTPUT_ROOT=lexyy
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else
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# Don't know what to do here.
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AC_WARN(can not find output from $LEX; assuming lex.yy.c)
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LEX_OUTPUT_ROOT=lex.yy
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fi
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DECLARE_YYTEXT=`eval ${CPP} "${LEX_OUTPUT_ROOT}.c" |
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sed -n '/extern.*yytext[^a-zA-Z0-9_]/s/^.*extern/extern/p'`
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rm -f "${LEX_OUTPUT_ROOT}.c"
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changequote([,])dnl
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fi
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AC_SUBST(LEX_OUTPUT_ROOT)dnl
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AC_DEFINE_UNQUOTED(DECLARE_YYTEXT, $DECLARE_YYTEXT)dnl
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])dnl
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dnl
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define(AC_PROG_INSTALL,
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[# Make sure to not get the incompatible SysV /etc/install and
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# /usr/sbin/install, which might be in PATH before a BSD-like install,
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# or the SunOS /usr/etc/install directory, or the AIX /bin/install,
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# or the AFS install, which mishandles nonexistent args, or
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# /usr/ucb/install on SVR4, which tries to use the nonexistent group
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# `staff', or /sbin/install on IRIX which has incompatible command-line
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# syntax. Sigh.
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#
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# On most BSDish systems install is in /usr/bin, not /usr/ucb
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# anyway.
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# This turns out not to be true, so the mere pathname isn't an indication
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# of whether the program works. What we really need is a set of tests for
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# the install program to see if it actually works in all the required ways.
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#
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# Avoid using ./install, which might have been erroneously created
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# by make from ./install.sh.
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if test "z${INSTALL}" = "z" ; then
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AC_CHECKING(for a BSD compatible install)
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IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
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for ac_dir in $PATH; do
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case "$ac_dir" in
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''|.|/etc|/sbin|/usr/sbin|/usr/etc|/usr/afsws/bin|/usr/ucb) ;;
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*)
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# OSF1 and SCO ODT 3.0 have their own names for install.
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for ac_prog in installbsd scoinst install; do
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if test -f $ac_dir/$ac_prog; then
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if grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then
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: # AIX
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else
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INSTALL="$ac_dir/$ac_prog -c"
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INSTALL_PROGRAM='${INSTALL}'
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INSTALL_DATA='${INSTALL} -m 644'
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break 2
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fi
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fi
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done
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;;
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esac
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done
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IFS="$ac_save_ifs"
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fi
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if test -z "$INSTALL"; then
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if test -f ${srcdir}/install.sh; then
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# As a last resort, use the slow shell script.
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INSTALL=AC_PROG_INSTALL_INSTALL_SH
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else
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AC_WARN(${srcdir}/install.sh not found; using cp)
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INSTALL=cp
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fi
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fi
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AC_SUBST(INSTALL)dnl
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AC_VERBOSE(setting INSTALL to $INSTALL)
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# Use test -z because SunOS4 sh mishandles ${INSTALL_PROGRAM-'${INSTALL}'}.
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# It thinks the first close brace ends the variable substitution.
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test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
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AC_SUBST(INSTALL_PROGRAM)dnl
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AC_VERBOSE(setting INSTALL_PROGRAM to $INSTALL_PROGRAM)
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test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL}'
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AC_SUBST(INSTALL_DATA)dnl
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AC_VERBOSE(setting INSTALL_DATA to $INSTALL_DATA)
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])dnl
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dnl Defined separately so a configure.in can redefine if necessary.
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dnl We want the top-level source directory, not the subdir's srcdir.
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dnl This relies on top_srcdir being substituted after INSTALL.
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define(AC_PROG_INSTALL_INSTALL_SH, ['@top_srcdir@/install.sh -c'])dnl
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dnl
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define(AC_LN_S,
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[AC_CHECKING(for ln -s)
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rm -f conftestdata
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if ln -s X conftestdata 2>/dev/null
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then
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rm -f conftestdata
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LN_S="ln -s"
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else
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LN_S=ln
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fi
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AC_SUBST(LN_S)
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])dnl
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dnl
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define(AC_RSH,
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[AC_CHECKING(for remote shell)
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if test -f /usr/ucb/rsh || test -f /usr/bin/remsh || test -f /usr/bin/rsh ||
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test -f /usr/bsd/rsh || test -f /usr/bin/nsh; then
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RTAPELIB=rtapelib.o
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else
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AC_HEADER_CHECK(netdb.h, AC_DEFINE(HAVE_NETDB_H) RTAPELIB=rtapelib.o,
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AC_DEFINE(NO_REMOTE))
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fi
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AC_SUBST(RTAPELIB)dnl
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])dnl
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dnl
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dnl
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dnl checks for header files
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dnl
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dnl
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define(AC_STDC_HEADERS,
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[AC_REQUIRE_CPP()dnl
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AC_CHECKING(for ANSI C header files)
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AC_TEST_CPP([#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <float.h>],
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[# SunOS 4.x string.h does not declare mem*, contrary to ANSI.
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AC_HEADER_EGREP(memchr, string.h,
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# SGI's /bin/cc from Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
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AC_TEST_PROGRAM([#include <ctype.h>
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#define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
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#define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
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#define XOR(e,f) (((e) && !(f)) || (!(e) && (f)))
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int main () { int i; for (i = 0; i < 256; i++)
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if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
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exit (0); }
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],
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[# ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
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AC_HEADER_EGREP(free, stdlib.h, AC_DEFINE(STDC_HEADERS))]))])
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])dnl
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dnl
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define(AC_UNISTD_H, [AC_OBSOLETE([$0], [; instead use AC_HAVE_HEADERS(unistd.h)])AC_HEADER_CHECK(unistd.h,
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AC_DEFINE(HAVE_UNISTD_H))])dnl
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dnl
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define(AC_USG,
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[AC_OBSOLETE([$0], [; instead use AC_HAVE_HEADERS(string.h) and HAVE_STRING_H])AC_COMPILE_CHECK([BSD string and memory functions],
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[#include <strings.h>], [rindex(0, 0); bzero(0, 0);], , AC_DEFINE(USG))])dnl
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dnl
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dnl
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dnl If memchr and the like aren't declared in <string.h>, include <memory.h>.
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dnl To avoid problems, don't check for gcc2 built-ins.
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define(AC_MEMORY_H,
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[AC_OBSOLETE([$0], [; instead use AC_HAVE_HEADERS(memory.h) and HAVE_MEMORY_H])AC_CHECKING(whether string.h declares mem functions)
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AC_HEADER_EGREP(memchr, string.h, ,
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AC_HEADER_CHECK(memory.h, AC_DEFINE(NEED_MEMORY_H)))]
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)dnl
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dnl
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define(AC_MAJOR_HEADER,
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[AC_COMPILE_CHECK([major, minor and makedev header],
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[#include <sys/types.h>],
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[return makedev(0, 0);], ac_makedev=1)
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if test -z "$ac_makedev"; then
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AC_HEADER_CHECK(sys/mkdev.h, AC_DEFINE(MAJOR_IN_MKDEV) ac_makedev=1)
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fi
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if test -z "$ac_makedev"; then
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AC_HEADER_CHECK(sys/sysmacros.h, AC_DEFINE(MAJOR_IN_SYSMACROS))
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fi]
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)dnl
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dnl
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define(AC_DIR_HEADER,
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[AC_PROVIDE([$0])AC_CHECKING(for directory library header)
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ac_dir_header=
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AC_DIR_HEADER_CHECK(dirent.h, DIRENT)
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AC_DIR_HEADER_CHECK(sys/ndir.h, SYSNDIR)
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AC_DIR_HEADER_CHECK(sys/dir.h, SYSDIR)
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AC_DIR_HEADER_CHECK(ndir.h, NDIR)
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AC_CHECKING(for closedir return value)
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AC_TEST_PROGRAM([#include <sys/types.h>
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#include <$ac_dir_header>
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int closedir(); main() { exit(closedir(opendir(".")) != 0); }], ,
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AC_DEFINE(VOID_CLOSEDIR))
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])dnl
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dnl Subroutine of AC_DIR_HEADER.
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dnl ??? I tried to put this define inside AC_DIR_HEADER, but when I did
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dnl that, $1 and $2 did not get expanded. --roland
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dnl Check if $1 is the winning directory library header file.
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dnl It must not only exist, but also correctly define the `DIR' type.
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dnl If it is really winning, define $2 and set shell var `ac_dir_header' to $1.
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define(AC_DIR_HEADER_CHECK, [dnl
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if test -z "$ac_dir_header"; then
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AC_COMPILE_CHECK($1, [#include <sys/types.h>
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#include <]$1[>],
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[DIR *dirp = 0;],
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AC_DEFINE($2) ac_dir_header=$1)dnl
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fi])dnl
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dnl
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dnl
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dnl checks for typedefs
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dnl
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dnl
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define(AC_GETGROUPS_T,
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[AC_REQUIRE([AC_UID_T])dnl
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AC_CHECKING(for type of array argument to getgroups)
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changequote(,)dnl
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dnl Do not put single quotes in the C program text!!
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ac_prog='/* Thanks to Mike Rendell for this test. */
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#include <sys/types.h>
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#define NGID 256
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#undef MAX
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#define MAX(x,y) ((x) > (y) ? (x) : (y))
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main()
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{
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gid_t gidset[NGID];
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int i, n;
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union { gid_t gval; long lval; } val;
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val.lval = -1;
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for (i = 0; i < NGID; i++)
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gidset[i] = val.gval;
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n = getgroups (sizeof (gidset) / MAX (sizeof (int), sizeof (gid_t)) - 1,
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gidset);
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/* Exit non-zero if getgroups seems to require an array of ints. This
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happens when gid_t is short but getgroups modifies an array of ints. */
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exit ((n > 0 && gidset[n] != val.gval) ? 1 : 0);
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}'
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changequote([,])dnl
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AC_TEST_PROGRAM([$ac_prog],
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AC_DEFINE(GETGROUPS_T, gid_t),
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AC_DEFINE(GETGROUPS_T, int))
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])dnl
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dnl
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define(AC_UID_T,
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[AC_PROVIDE([$0])AC_CHECKING(for uid_t in sys/types.h)
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AC_HEADER_EGREP(uid_t, sys/types.h, ,
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AC_DEFINE(uid_t, int) AC_DEFINE(gid_t, int))])dnl
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dnl
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define(AC_SIZE_T,
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[AC_CHECKING(for size_t in sys/types.h)
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AC_HEADER_EGREP(size_t, sys/types.h, , AC_DEFINE(size_t, unsigned))])dnl
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dnl
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define(AC_PID_T,
|
|
[AC_PROVIDE([$0])AC_CHECKING(for pid_t in sys/types.h)
|
|
AC_HEADER_EGREP(pid_t, sys/types.h, , AC_DEFINE(pid_t, int))])dnl
|
|
dnl
|
|
define(AC_OFF_T,
|
|
[AC_PROVIDE([$0])AC_CHECKING(for off_t in sys/types.h)
|
|
AC_HEADER_EGREP(off_t, sys/types.h, , AC_DEFINE(off_t, long))])dnl
|
|
dnl
|
|
define(AC_MODE_T,
|
|
[AC_CHECKING(for mode_t in sys/types.h)
|
|
AC_HEADER_EGREP(mode_t, sys/types.h, , AC_DEFINE(mode_t, int))])dnl
|
|
dnl
|
|
define(AC_RETSIGTYPE,
|
|
[AC_PROVIDE([$0])AC_COMPILE_CHECK([return type of signal handlers],
|
|
[#include <sys/types.h>
|
|
#include <signal.h>
|
|
#ifdef signal
|
|
#undef signal
|
|
#endif
|
|
extern void (*signal ()) ();],
|
|
[int i;],
|
|
[AC_DEFINE(RETSIGTYPE, void)],
|
|
[AC_DEFINE(RETSIGTYPE, int)])]
|
|
)dnl
|
|
dnl
|
|
dnl
|
|
dnl checks for functions
|
|
dnl
|
|
dnl
|
|
define(AC_MMAP, [
|
|
AC_CHECKING(for working mmap)
|
|
AC_TEST_PROGRAM([/* Thanks to Mike Haertel and Jim Avera for this test. */
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
#include <sys/mman.h>
|
|
|
|
#ifdef BSD
|
|
#ifndef BSD4_1
|
|
#define HAVE_GETPAGESIZE
|
|
#endif
|
|
#endif
|
|
#ifndef HAVE_GETPAGESIZE
|
|
#include <sys/param.h>
|
|
#ifdef EXEC_PAGESIZE
|
|
#define getpagesize() EXEC_PAGESIZE
|
|
#else
|
|
#ifdef NBPG
|
|
#define getpagesize() NBPG * CLSIZE
|
|
#ifndef CLSIZE
|
|
#define CLSIZE 1
|
|
#endif /* no CLSIZE */
|
|
#else /* no NBPG */
|
|
#define getpagesize() NBPC
|
|
#endif /* no NBPG */
|
|
#endif /* no EXEC_PAGESIZE */
|
|
#endif /* not HAVE_GETPAGESIZE */
|
|
|
|
#ifdef __osf__
|
|
#define valloc malloc
|
|
#endif
|
|
|
|
extern char *valloc();
|
|
extern char *malloc();
|
|
|
|
int
|
|
main()
|
|
{
|
|
char *buf1, *buf2, *buf3;
|
|
int i = getpagesize(), j;
|
|
int i2 = getpagesize()*2;
|
|
int fd;
|
|
|
|
buf1 = valloc(i2);
|
|
buf2 = valloc(i);
|
|
buf3 = malloc(i2);
|
|
for (j = 0; j < i2; ++j)
|
|
*(buf1 + j) = rand();
|
|
fd = open("conftestmmap", O_CREAT | O_RDWR, 0666);
|
|
write(fd, buf1, i2);
|
|
mmap(buf2, i, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, fd, 0);
|
|
for (j = 0; j < i; ++j)
|
|
if (*(buf1 + j) != *(buf2 + j))
|
|
exit(1);
|
|
lseek(fd, (long)i, 0);
|
|
read(fd, buf2, i); /* read into mapped memory -- file should not change */
|
|
/* (it does in i386 SVR4.0 - Jim Avera) */
|
|
lseek(fd, (long)0, 0);
|
|
read(fd, buf3, i2);
|
|
for (j = 0; j < i2; ++j)
|
|
if (*(buf1 + j) != *(buf3 + j))
|
|
exit(1);
|
|
exit(0);
|
|
}
|
|
], AC_DEFINE(HAVE_MMAP))
|
|
])dnl
|
|
dnl
|
|
define(AC_VPRINTF,
|
|
[AC_COMPILE_CHECK([vprintf], , [vprintf();], AC_DEFINE(HAVE_VPRINTF),
|
|
ac_vprintf_missing=1)
|
|
if test -n "$ac_vprintf_missing"; then
|
|
AC_COMPILE_CHECK([_doprnt], , [_doprnt();], AC_DEFINE(HAVE_DOPRNT))
|
|
fi
|
|
])dnl
|
|
dnl
|
|
define(AC_VFORK,
|
|
[AC_REQUIRE([AC_PID_T])AC_HEADER_CHECK(vfork.h, AC_DEFINE(HAVE_VFORK_H))
|
|
AC_CHECKING(for working vfork)
|
|
AC_REQUIRE([AC_RETSIGTYPE])
|
|
AC_TEST_PROGRAM([/* Thanks to Paul Eggert for this test. */
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <signal.h>
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#ifdef HAVE_VFORK_H
|
|
#include <vfork.h>
|
|
#endif
|
|
static int signalled;
|
|
static RETSIGTYPE catch (s) int s; { signalled = 1; }
|
|
main() {
|
|
pid_t parent = getpid ();
|
|
pid_t child;
|
|
|
|
signal (SIGINT, catch);
|
|
|
|
child = vfork ();
|
|
|
|
if (child == 0) {
|
|
/* On 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 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 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. SunOS 5.2), if the parent is catching
|
|
a signal, the child ignores the signal before execing,
|
|
and the parent later receives that signal, the parent dumps core.
|
|
Test for this by ignoring SIGINT in the child. */
|
|
signal (SIGINT, SIG_IGN);
|
|
|
|
/* 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 signal handling bug occur? */
|
|
|| kill(parent, SIGINT) != 0
|
|
|| signalled != 1
|
|
|
|
/* Did the file descriptor bug occur? */
|
|
|| fstat(fileno(stdout), &st) != 0
|
|
);
|
|
}
|
|
}], , AC_DEFINE(vfork, fork))
|
|
])dnl
|
|
dnl
|
|
define(AC_WAIT3,
|
|
[AC_CHECKING(for wait3 that fills in rusage)
|
|
AC_TEST_PROGRAM([#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. */
|
|
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. */
|
|
r.ru_nvcsw = 0;
|
|
r.ru_stime.tv_sec = 0;
|
|
r.ru_stime.tv_usec = 0;
|
|
switch (fork()) {
|
|
case 0: /* Child. */
|
|
sleep(1); /* Give up the CPU. */
|
|
_exit(0);
|
|
case -1: _exit(0); /* What can we do? */
|
|
default: /* Parent. */
|
|
wait3(&i, 0, &r);
|
|
exit(r.ru_nvcsw == 0
|
|
&& r.ru_stime.tv_sec == 0 && r.ru_stime.tv_usec == 0);
|
|
}
|
|
}], AC_DEFINE(HAVE_WAIT3))
|
|
])dnl
|
|
dnl
|
|
define(AC_ALLOCA,
|
|
[# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
|
|
# for constant arguments. Useless!
|
|
AC_COMPILE_CHECK(working alloca.h, [#include <alloca.h>],
|
|
[char *p = alloca(2 * sizeof(int));], AC_DEFINE(HAVE_ALLOCA_H))
|
|
ac_decl="#ifdef __GNUC__
|
|
#define alloca __builtin_alloca
|
|
#else
|
|
#if HAVE_ALLOCA_H
|
|
#include <alloca.h>
|
|
#else
|
|
#ifdef _AIX
|
|
#pragma alloca
|
|
#else
|
|
char *alloca ();
|
|
#endif
|
|
#endif
|
|
#endif
|
|
"
|
|
AC_COMPILE_CHECK([alloca], $ac_decl,
|
|
[char *p = (char *) alloca(1);], [AC_DEFINE([HAVE_ALLOCA])], [dnl
|
|
ac_alloca_missing=1
|
|
AC_PROGRAM_EGREP(winnitude, [
|
|
#if defined(CRAY) && ! defined(CRAY2)
|
|
winnitude
|
|
#else
|
|
lossage
|
|
#endif
|
|
],
|
|
AC_FUNC_CHECK([_getb67],AC_DEFINE([CRAY_STACKSEG_END],[_getb67]),
|
|
AC_FUNC_CHECK([GETB67],AC_DEFINE([CRAY_STACKSEG_END],[GETB67]),
|
|
AC_FUNC_CHECK([getb67],AC_DEFINE([CRAY_STACKSEG_END],[getb67])))))
|
|
])
|
|
if test -n "$ac_alloca_missing"; 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.o
|
|
AC_DEFINE(C_ALLOCA)
|
|
|
|
AC_CHECKING(stack direction for C alloca)
|
|
AC_TEST_PROGRAM([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;
|
|
}
|
|
main ()
|
|
{
|
|
exit (find_stack_direction() < 0);
|
|
}], dnl
|
|
AC_DEFINE(STACK_DIRECTION,1), AC_DEFINE(STACK_DIRECTION,-1), dnl
|
|
AC_DEFINE(STACK_DIRECTION,0))
|
|
fi
|
|
AC_SUBST(ALLOCA)dnl
|
|
])dnl
|
|
dnl
|
|
define(AC_GETLOADAVG,
|
|
[# Some definitions of getloadavg require that the program be installed setgid.
|
|
AC_SUBST(NEED_SETGID)NEED_SETGID=false
|
|
ac_need_func=true
|
|
|
|
# Check for the 4.4BSD definition of getloadavg.
|
|
AC_HAVE_LIBRARY(util, LIBS="$LIBS -lutil" ac_need_func=false)
|
|
# Some systems with -lutil have (and need) -lkvm as well, some do not.
|
|
AC_HAVE_LIBRARY(kvm, LIBS="$LIBS -lkvm")
|
|
|
|
if $ac_need_func; then
|
|
# There is a commonly available library for RS/6000 AIX.
|
|
# Since it is not a standard part of AIX, it might be installed locally.
|
|
LIBS_old="$LIBS"
|
|
LIBS="-L/usr/local/lib $LIBS"
|
|
AC_HAVE_LIBRARY(getloadavg, LIBS="$LIBS -lgetloadavg" ac_need_func=false,
|
|
LIBS="$LIBS_old")
|
|
fi
|
|
|
|
# Make sure it is really in the library, if we think we found it at all.
|
|
AC_REPLACE_FUNCS(getloadavg)
|
|
|
|
case "$LIBOBJS" in
|
|
*getloadavg*)
|
|
ac_need_func=true
|
|
AC_HEADER_CHECK(sys/dg_sys_info.h, [dnl
|
|
AC_DEFINE(DGUX) ac_need_func=false
|
|
# Some versions of DGUX need -ldgc for dg_sys_info.
|
|
AC_HAVE_LIBRARY(dgc)])
|
|
if $ac_need_func; then
|
|
# We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
|
|
# uses stabs), but it's still SVR4. We cannot check for <elf.h> because
|
|
# Irix 4.0.5F has the header but not the library.
|
|
AC_HAVE_LIBRARY(elf, AC_DEFINE(SVR4) LIBS="$LIBS -lelf" ac_need_func=false
|
|
AC_HAVE_LIBRARY(kvm, LIBS="$LIBS -lkvm"))
|
|
fi
|
|
if $ac_need_func; then
|
|
AC_HEADER_CHECK(inq_stats/cpustats.h, AC_DEFINE(UMAX4_3) AC_DEFINE(UMAX)
|
|
ac_need_func=false)
|
|
fi
|
|
if $ac_need_func; then
|
|
AC_HEADER_CHECK(sys/cpustats.h, AC_DEFINE(UMAX) ac_need_func=false)
|
|
fi
|
|
if $ac_need_func; then
|
|
AC_HAVE_HEADERS(mach/mach.h)
|
|
fi
|
|
|
|
AC_HEADER_CHECK(nlist.h,
|
|
[AC_DEFINE(NLIST_STRUCT)
|
|
AC_COMPILE_CHECK(n_un in struct nlist, [#include <nlist.h>],
|
|
[struct nlist n; n.n_un.n_name = 0;],
|
|
AC_DEFINE(NLIST_NAME_UNION))])dnl
|
|
|
|
# Figure out whether we will need to install setgid.
|
|
AC_PROGRAM_EGREP([Yowza Am I SETGID yet], [dnl
|
|
#include "${srcdir}/getloadavg.c"
|
|
#ifdef LDAV_PRIVILEGED
|
|
Yowza Am I SETGID yet
|
|
#endif], [AC_DEFINE(GETLOADAVG_PRIVILEGED) NEED_SETGID=true])dnl
|
|
;;
|
|
|
|
*) AC_DEFINE(HAVE_GETLOADAVG) ;;
|
|
esac
|
|
|
|
if $NEED_SETGID; then
|
|
AC_SUBST(KMEM_GROUP)# Figure out what group owns /dev/kmem.
|
|
# The installed program will need to be setgid and owned by that group.
|
|
changequote(,)dnl
|
|
# On Solaris, /dev/kmem is a symlink. Get info on the real file.
|
|
ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
|
|
# If we got an error (system does not support symlinks), try without -L.
|
|
test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
|
|
KMEM_GROUP=`echo $ac_ls_output \
|
|
| sed -ne 's/[ ][ ]*/ /g;
|
|
s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\) *.*/\1/;
|
|
/ /s/.* //;p;'`
|
|
changequote([,])dnl
|
|
fi
|
|
])dnl
|
|
dnl
|
|
define(AC_UTIME_NULL,
|
|
[AC_CHECKING(utime with null argument)
|
|
rm -f conftestdata; > conftestdata
|
|
# Sequent interprets utime(file, 0) to mean use start of epoch. Wrong.
|
|
AC_TEST_PROGRAM([#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
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_DEFINE(HAVE_UTIME_NULL))
|
|
rm -f core
|
|
])dnl
|
|
dnl
|
|
define(AC_STRCOLL, [AC_CHECKING(for strcoll)
|
|
AC_TEST_PROGRAM([#include <string.h>
|
|
main ()
|
|
{
|
|
exit (strcoll ("abc", "def") >= 0 ||
|
|
strcoll ("ABC", "DEF") >= 0 ||
|
|
strcoll ("123", "456") >= 0);
|
|
}], AC_DEFINE(HAVE_STRCOLL))])dnl
|
|
dnl
|
|
define(AC_SETVBUF_REVERSED,
|
|
[AC_TEST_PROGRAM([#include <stdio.h>
|
|
/* If setvbuf has the reversed format, exit 0. */
|
|
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_DEFINE(SETVBUF_REVERSED))
|
|
rm -f core
|
|
])dnl
|
|
dnl
|
|
dnl
|
|
dnl checks for structure members
|
|
dnl
|
|
dnl
|
|
define(AC_STRUCT_TM,
|
|
[AC_PROVIDE([$0])AC_COMPILE_CHECK([struct tm in time.h],
|
|
[#include <sys/types.h>
|
|
#include <time.h>],
|
|
[struct tm *tp; tp->tm_sec;], , AC_DEFINE(TM_IN_SYS_TIME))])dnl
|
|
dnl
|
|
define(AC_TIME_WITH_SYS_TIME,
|
|
[AC_COMPILE_CHECK([whether time.h and sys/time.h may both be included],
|
|
[#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <time.h>],
|
|
[struct tm *tp;], AC_DEFINE(TIME_WITH_SYS_TIME))])dnl
|
|
dnl
|
|
define(AC_TIMEZONE,
|
|
[AC_REQUIRE([AC_STRUCT_TM])ac_decl='#include <sys/types.h>
|
|
'
|
|
case "$DEFS" in
|
|
*TM_IN_SYS_TIME*) ac_decl="$ac_decl
|
|
#include <sys/time.h>
|
|
" ;;
|
|
*) ac_decl="$ac_decl
|
|
#include <time.h>
|
|
" ;;
|
|
esac
|
|
AC_COMPILE_CHECK([tm_zone in struct tm], $ac_decl,
|
|
[struct tm tm; tm.tm_zone;], AC_DEFINE(HAVE_TM_ZONE), ac_no_tm_zone=1)
|
|
if test -n "$ac_no_tm_zone"; then
|
|
AC_COMPILE_CHECK(tzname, changequote(<<,>>)dnl
|
|
<<#include <time.h>
|
|
#ifndef tzname /* For SGI. */
|
|
extern char *tzname[]; /* RS6000 and others want it this way. */
|
|
#endif>>, changequote([,])dnl
|
|
[atoi(*tzname);], AC_DEFINE(HAVE_TZNAME))
|
|
fi
|
|
])dnl
|
|
dnl
|
|
define(AC_ST_BLOCKS,
|
|
[AC_COMPILE_CHECK([st_blocks in struct stat],
|
|
[#include <sys/types.h>
|
|
#include <sys/stat.h>], [struct stat s; s.st_blocks;],
|
|
AC_DEFINE(HAVE_ST_BLOCKS), LIBOBJS="$LIBOBJS fileblocks.o")dnl
|
|
AC_SUBST(LIBOBJS)dnl
|
|
])dnl
|
|
dnl
|
|
define(AC_ST_BLKSIZE,
|
|
[AC_COMPILE_CHECK([st_blksize in struct stat],
|
|
[#include <sys/types.h>
|
|
#include <sys/stat.h>], [struct stat s; s.st_blksize;],
|
|
AC_DEFINE(HAVE_ST_BLKSIZE))])dnl
|
|
dnl
|
|
define(AC_ST_RDEV,
|
|
[AC_COMPILE_CHECK([st_rdev in struct stat],
|
|
[#include <sys/types.h>
|
|
#include <sys/stat.h>], [struct stat s; s.st_rdev;],
|
|
AC_DEFINE(HAVE_ST_RDEV))])dnl
|
|
dnl
|
|
dnl
|
|
dnl checks for compiler characteristics
|
|
dnl
|
|
dnl
|
|
define(AC_CROSS_CHECK,
|
|
[AC_PROVIDE([$0])AC_CHECKING(whether cross-compiling)
|
|
# If we cannot run a trivial program, we must be cross compiling.
|
|
AC_TEST_PROGRAM([main(){exit(0);}], , cross_compiling=1)
|
|
])dnl
|
|
dnl
|
|
define(AC_CHAR_UNSIGNED,
|
|
[AC_CHECKING(for unsigned characters)
|
|
AC_TEST_PROGRAM(
|
|
[/* volatile prevents gcc2 from optimizing the test away on sparcs. */
|
|
#if !__STDC__
|
|
#define volatile
|
|
#endif
|
|
main() {
|
|
#ifdef __CHAR_UNSIGNED__
|
|
exit(1); /* No need to redefine it. */
|
|
#else
|
|
volatile char c = 255; exit(c < 0);
|
|
#endif
|
|
}], AC_DEFINE(__CHAR_UNSIGNED__))]
|
|
)dnl
|
|
dnl
|
|
define(AC_LONG_DOUBLE,
|
|
[AC_REQUIRE([AC_PROG_CC])dnl
|
|
AC_CHECKING(for long double)
|
|
if test -n "$GCC"; then
|
|
AC_DEFINE(HAVE_LONG_DOUBLE)
|
|
else
|
|
AC_TEST_PROGRAM([int main() {
|
|
/* The Stardent Vistra knows sizeof(long double), but does not support it. */
|
|
long double foo = 0.0;
|
|
/* On Ultrix 4.3 cc, long double is 4 and double is 8. */
|
|
exit(sizeof(long double) < sizeof(double)); }],
|
|
AC_DEFINE(HAVE_LONG_DOUBLE))
|
|
fi
|
|
])dnl
|
|
dnl
|
|
define(AC_INT_16_BITS,
|
|
[AC_OBSOLETE([$0], [; instead use AC_SIZEOF_TYPE(int, sizevar)])
|
|
AC_CHECKING(integer size)
|
|
AC_TEST_PROGRAM([main() { exit(sizeof(int) != 2); }],
|
|
AC_DEFINE(INT_16_BITS))
|
|
])dnl
|
|
dnl
|
|
define(AC_LONG_64_BITS,
|
|
[AC_OBSOLETE([$0], [; instead use AC_SIZEOF_TYPE(long, sizevar)])
|
|
AC_CHECKING(for 64-bit long ints)
|
|
AC_TEST_PROGRAM([main() { exit(sizeof(long int) != 8); }],
|
|
AC_DEFINE(LONG_64_BITS))
|
|
])dnl
|
|
dnl
|
|
define(AC_WORDS_BIGENDIAN,
|
|
[AC_CHECKING(byte ordering)
|
|
AC_TEST_PROGRAM([main () {
|
|
/* Are we little or big endian? From Harbison&Steele. */
|
|
union
|
|
{
|
|
long l;
|
|
char c[sizeof (long)];
|
|
} u;
|
|
u.l = 1;
|
|
exit (u.c[sizeof (long) - 1] == 1);
|
|
}], , AC_DEFINE(WORDS_BIGENDIAN))
|
|
])dnl
|
|
dnl
|
|
define(AC_ARG_ARRAY,
|
|
[AC_CHECKING(whether the address of an argument can be used as an array)
|
|
AC_TEST_PROGRAM([main() {
|
|
/* Return 0 iff arg arrays are ok. */
|
|
exit(!x(1, 2, 3, 4));
|
|
}
|
|
x(a, b, c, d) {
|
|
return y(a, &b);
|
|
}
|
|
/* Return 1 iff arg arrays are ok. */
|
|
y(a, b) int *b; {
|
|
return a == 1 && b[0] == 2 && b[1] == 3 && b[2] == 4;
|
|
}], , AC_DEFINE(NO_ARG_ARRAY))
|
|
rm -f core
|
|
])dnl
|
|
dnl
|
|
define(AC_INLINE,
|
|
[AC_REQUIRE([AC_PROG_CC])if test -n "$GCC"; then
|
|
AC_COMPILE_CHECK([inline], , [} inline foo() {], , AC_DEFINE(inline, __inline))
|
|
fi
|
|
])dnl
|
|
define(AC_CONST,
|
|
[changequote(,)dnl
|
|
dnl Do not put single quotes in the C program text!!
|
|
ac_prog='/* Ultrix mips cc rejects this. */
|
|
typedef int charset[2]; const charset x;
|
|
/* SunOS 4.1.1 cc rejects this. */
|
|
char const *const *ccp;
|
|
char **p;
|
|
/* AIX XL C 1.02.0.0 rejects this.
|
|
It does not let you subtract one const X* pointer from another in an arm
|
|
of an if-expression whose if-part is not a constant expression */
|
|
const char *g = "string";
|
|
ccp = &g + (g ? g-g : 0);
|
|
/* HPUX 7.0 cc rejects these. */
|
|
++ccp;
|
|
p = (char**) ccp;
|
|
ccp = (char const *const *) p;
|
|
{ /* SCO 3.2v4 cc rejects this. */
|
|
char *t;
|
|
char const *s = 0 ? (char *) 0 : (char const *) 0;
|
|
|
|
*t++ = 0;
|
|
}
|
|
{ /* Someone thinks the Sun supposedly-ANSI compiler will reject this. */
|
|
int x[] = {25,17};
|
|
const int *foo = &x[0];
|
|
++foo;
|
|
}
|
|
{ /* Sun SC1.0 ANSI compiler rejects this -- but not the above. */
|
|
typedef const int *iptr;
|
|
iptr p = 0;
|
|
++p;
|
|
}
|
|
{ /* AIX XL C 1.02.0.0 rejects this saying
|
|
"k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
|
|
struct s { int j; const int *ap[3]; };
|
|
struct s *b; b->j = 5;
|
|
}
|
|
{ /* ULTRIX-32 V3.1 (Rev 9) vcc rejects this */
|
|
const int foo = 10;
|
|
}'
|
|
changequote([,])dnl
|
|
AC_COMPILE_CHECK([dnl Do not "break" this again.
|
|
lack of working const], , [$ac_prog], , AC_DEFINE(const,))])dnl
|
|
dnl
|
|
dnl
|
|
dnl checks for operating system services
|
|
dnl
|
|
dnl
|
|
define(AC_HAVE_POUNDBANG, [dnl
|
|
AC_CHECKING(whether \`#!' works in shell scripts)
|
|
echo '#!/bin/cat
|
|
exit 69
|
|
' > conftest
|
|
chmod u+x conftest
|
|
(SHELL=/bin/sh; export SHELL; ./conftest > /dev/null)
|
|
if test $? -ne 69; then
|
|
:; $1
|
|
else
|
|
:; $2
|
|
fi
|
|
rm -f conftest
|
|
])dnl
|
|
define(AC_REMOTE_TAPE,
|
|
[AC_CHECKING(for remote tape and socket header files)
|
|
AC_HEADER_CHECK(sys/mtio.h, AC_DEFINE(HAVE_SYS_MTIO_H) ac_have_mtio_h=1)
|
|
if test -n "$ac_have_mtio_h"; then
|
|
AC_TEST_CPP([#include <sgtty.h>
|
|
#include <sys/socket.h>], PROGS="$PROGS rmt")
|
|
fi
|
|
])dnl
|
|
dnl
|
|
define(AC_LONG_FILE_NAMES,
|
|
[AC_CHECKING(for long file names)
|
|
ac_some_dir_failed=false
|
|
# Test for long file names in all the places we know might matter:
|
|
# . the current directory, where building will happen
|
|
# /tmp where it might want to write temporary files
|
|
# /var/tmp likewise
|
|
# /usr/tmp likewise
|
|
# $prefix/lib where we will be installing things
|
|
# $exec_prefix/lib likewise
|
|
# eval it to expand exec_prefix.
|
|
for ac_dir in `eval echo . /tmp /var/tmp /usr/tmp $prefix/lib $exec_prefix/lib` ; do
|
|
test -d $ac_dir || continue
|
|
test -w $ac_dir || continue # It's less confusing to not echo anything here.
|
|
(echo 1 > $ac_dir/conftest9012345) 2>/dev/null
|
|
(echo 2 > $ac_dir/conftest9012346) 2>/dev/null
|
|
val=`cat $ac_dir/conftest9012345 2>/dev/null`
|
|
test -f $ac_dir/conftest9012345 && test "$val" = 1 || ac_some_dir_failed=true
|
|
rm -f $ac_dir/conftest9012345 $ac_dir/conftest9012346 2> /dev/null
|
|
done
|
|
$ac_some_dir_failed || AC_DEFINE(HAVE_LONG_FILE_NAMES)
|
|
])dnl
|
|
dnl
|
|
define(AC_RESTARTABLE_SYSCALLS,
|
|
[AC_CHECKING(for restartable system calls)
|
|
AC_TEST_PROGRAM(
|
|
[/* 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>
|
|
ucatch (isig) { }
|
|
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_DEFINE(HAVE_RESTARTABLE_SYSCALLS))
|
|
])dnl
|
|
dnl
|
|
define(AC_FIND_X,
|
|
[AC_PROVIDE([$0])# If we find X, set shell vars x_includes and x_libraries to the paths.
|
|
no_x=true
|
|
AC_FIND_X_XMKMF
|
|
if test -z "$ac_imake_usrlibdir"; then
|
|
AC_FIND_X_DIRECT
|
|
fi
|
|
test -n "$x_includes" && AC_VERBOSE(X11 headers are in $x_includes)
|
|
test -n "$x_libraries" && AC_VERBOSE(X11 libraries are in $x_libraries)
|
|
])dnl
|
|
dnl
|
|
dnl Internal subroutine of AC_FIND_X.
|
|
define(AC_FIND_X_XMKMF,
|
|
[AC_CHECKING(for X include and library files with xmkmf)
|
|
rm -fr conftestdir
|
|
if mkdir conftestdir; then
|
|
cd conftestdir
|
|
cat > Imakefile <<'EOF'
|
|
acfindx:
|
|
@echo 'ac_imake_incroot="${INCROOT}"; ac_imake_usrlibdir="${USRLIBDIR}"; ac_imake_libdir="${LIBDIR}"'
|
|
EOF
|
|
if (xmkmf) >/dev/null 2>/dev/null && test -f Makefile; then
|
|
no_x=
|
|
# GNU make sometimes prints "make[1]: Entering...", which would confuse us.
|
|
eval `make acfindx 2>/dev/null | grep -v make`
|
|
# Open Windows xmkmf reportedly sets LIBDIR instead of USRLIBDIR.
|
|
if test ! -f $ac_imake_usrlibdir/libX11.a && test -f $ac_imake_libdir/libX11.a; then
|
|
ac_imake_usrlibdir=$ac_imake_libdir
|
|
fi
|
|
case "$ac_imake_incroot" in
|
|
/usr/include) ;;
|
|
*) x_includes="${x_includes-$ac_imake_incroot}" ;;
|
|
esac
|
|
case "$ac_imake_usrlibdir" in
|
|
/usr/lib | /lib) ;;
|
|
*) x_libraries="${x_libraries-$ac_imake_usrlibdir}" ;;
|
|
esac
|
|
fi
|
|
cd ..
|
|
rm -fr conftestdir
|
|
fi
|
|
])dnl
|
|
dnl
|
|
dnl Internal subroutine of AC_FIND_X.
|
|
define(AC_FIND_X_DIRECT,
|
|
[AC_CHECKING(for X include and library files directly)
|
|
if test ".$x_direct_test_library" = . ; then
|
|
x_direct_test_library='Xt'
|
|
fi
|
|
if test ".$x_direct_test_include" = . ; then
|
|
x_direct_test_include='X11/Intrinsic.h'
|
|
fi
|
|
AC_TEST_CPP([#include <$x_direct_test_include>], no_x=,
|
|
for ac_dir in \
|
|
/usr/X11R6/include \
|
|
/usr/X11R5/include \
|
|
/usr/X11R4/include \
|
|
\
|
|
/usr/include/X11R6 \
|
|
/usr/include/X11R5 \
|
|
/usr/include/X11R4 \
|
|
\
|
|
/usr/local/X11R6/include \
|
|
/usr/local/X11R5/include \
|
|
/usr/local/X11R4/include \
|
|
\
|
|
/usr/local/include/X11R6 \
|
|
/usr/local/include/X11R5 \
|
|
/usr/local/include/X11R4 \
|
|
\
|
|
/usr/X11/include \
|
|
/usr/include/X11 \
|
|
/usr/local/X11/include \
|
|
/usr/local/include/X11 \
|
|
\
|
|
/usr/X386/include \
|
|
/usr/x386/include \
|
|
/usr/XFree86/include/X11 \
|
|
\
|
|
/usr/include \
|
|
/usr/local/include \
|
|
/usr/unsupported/include \
|
|
/usr/athena/include \
|
|
/usr/local/x11r5/include \
|
|
/usr/lpp/Xamples/include \
|
|
\
|
|
/usr/openwin/include \
|
|
/usr/openwin/share/include \
|
|
; \
|
|
do
|
|
if test -r "$ac_dir/$x_direct_test_include"; then
|
|
x_includes=${x_includes-$ac_dir}; no_x=
|
|
break
|
|
fi
|
|
done)
|
|
|
|
# Check for the libraries. First see if replacing the `include' by
|
|
# `lib' works.
|
|
AC_HAVE_LIBRARY("$x_direct_test_library", no_x=,
|
|
for ac_dir in `echo "$x_includes" | sed s/include/lib/` \
|
|
/usr/X11R6/lib \
|
|
/usr/X11R5/lib \
|
|
/usr/X11R4/lib \
|
|
\
|
|
/usr/lib/X11R6 \
|
|
/usr/lib/X11R5 \
|
|
/usr/lib/X11R4 \
|
|
\
|
|
/usr/local/X11R6/lib \
|
|
/usr/local/X11R5/lib \
|
|
/usr/local/X11R4/lib \
|
|
\
|
|
/usr/local/lib/X11R6 \
|
|
/usr/local/lib/X11R5 \
|
|
/usr/local/lib/X11R4 \
|
|
\
|
|
/usr/X11/lib \
|
|
/usr/lib/X11 \
|
|
/usr/local/X11/lib \
|
|
/usr/local/lib/X11 \
|
|
\
|
|
/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 \
|
|
\
|
|
/usr/openwin/lib \
|
|
/usr/openwin/share/lib \
|
|
; \
|
|
do
|
|
for ac_extension in a so sl; do
|
|
if test -r $ac_dir/lib${x_direct_test_library}.$ac_extension; then
|
|
x_libraries=${x_libraries-$ac_dir}; no_x=
|
|
break 2
|
|
fi
|
|
done
|
|
done)])dnl
|
|
dnl
|
|
dnl Find additional X libraries, magic flags, etc.
|
|
define(AC_FIND_XTRA, [AC_REQUIRE(AC_FIND_X)AC_REQUIRE(AC_ISC_POSIX)
|
|
if test -n "$x_includes"; then
|
|
X_CFLAGS="$X_CFLAGS -I$x_includes"
|
|
elif test -n "$no_x"; then
|
|
# Not all programs may use this symbol, but it won't hurt to define it.
|
|
X_CFLAGS="$X_CFLAGS -DX_DISPLAY_MISSING"
|
|
fi
|
|
|
|
# It would be nice to have a more robust check for the -R ld option than
|
|
# just checking for Solaris.
|
|
# 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$x_libraries"
|
|
if test "`uname 2>/dev/null`" = SunOS \
|
|
&& uname -r | grep '^5' >/dev/null; then
|
|
X_LIBS="$X_LIBS -R$x_libraries"
|
|
fi
|
|
fi
|
|
|
|
# Check for additional X libraries.
|
|
|
|
if test -n "$ISC"; then
|
|
X_LIBS="$X_LIBS -lnsl_s -linet"
|
|
AC_VERBOSE(adding -lnsl_s -linet to X_LIBS)
|
|
else
|
|
# Martyn.Johnson@cl.cam.ac.uk says this is needed for Ultrix, if the X
|
|
# libraries were built with DECnet support. And karl@cs.umb.edu's Alpha
|
|
# needs dnet_stub.
|
|
AC_HAVE_LIBRARY(dnet,
|
|
[X_LIBS="$X_LIBS -ldnet"
|
|
ac_have_dnet=t
|
|
AC_VERBOSE(adding -ldnet to X_LIBS)])
|
|
if test -z "$ac_have_dnet"; then
|
|
AC_HAVE_LIBRARY(dnet_stub,
|
|
[X_LIBS="$X_LIBS -ldnet_stub"
|
|
AC_VERBOSE(adding -ldnet_stub to X_LIBS)])
|
|
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, according to kb@cs.umb.edu.
|
|
if test "`uname 2>/dev/null`" != IRIX; then
|
|
AC_HAVE_LIBRARY(socket,
|
|
[x_extra_libs="$x_extra_libs -lsocket"
|
|
test -n "$verbose" && echo " adding -lsocket to x_extra_libs"])
|
|
fi
|
|
fi
|
|
#
|
|
AC_SUBST(X_CFLAGS)dnl
|
|
AC_SUBST(X_LIBS)dnl
|
|
])dnl
|
|
dnl
|
|
dnl
|
|
dnl checks for UNIX variants
|
|
dnl
|
|
dnl
|
|
define(AC_AIX,
|
|
[AC_CHECKING(for AIX)
|
|
AC_BEFORE([$0], [AC_COMPILE_CHECK])AC_BEFORE([$0], [AC_TEST_PROGRAM])AC_BEFORE([$0], [AC_HEADER_EGREP])AC_BEFORE([$0], [AC_TEST_CPP])AC_PROGRAM_EGREP(yes,
|
|
[#ifdef _AIX
|
|
yes
|
|
#endif
|
|
], AC_DEFINE(_ALL_SOURCE))
|
|
])dnl
|
|
dnl
|
|
define(AC_MINIX,
|
|
[AC_BEFORE([$0], [AC_COMPILE_CHECK])AC_BEFORE([$0], [AC_TEST_PROGRAM])AC_BEFORE([$0], [AC_HEADER_EGREP])AC_BEFORE([$0], [AC_TEST_CPP])AC_HEADER_CHECK(minix/config.h, MINIX=1)
|
|
# The Minix shell can't assign to the same variable on the same line!
|
|
if test -n "$MINIX"; then
|
|
AC_DEFINE(_POSIX_SOURCE)
|
|
AC_DEFINE(_POSIX_1_SOURCE, 2)
|
|
AC_DEFINE(_MINIX)
|
|
fi
|
|
])dnl
|
|
dnl
|
|
define(AC_ISC_POSIX,
|
|
[AC_PROVIDE([$0])AC_BEFORE([$0], [AC_COMPILE_CHECK])AC_BEFORE([$0], [AC_TEST_PROGRAM])AC_BEFORE([$0], [AC_HEADER_EGREP])AC_BEFORE([$0], [AC_TEST_CPP])AC_CHECKING(for POSIXized ISC)
|
|
if test -d /etc/conf/kconfig.d &&
|
|
grep _POSIX_VERSION [/usr/include/sys/unistd.h] >/dev/null 2>&1
|
|
then
|
|
ISC=1 # If later tests want to check for ISC.
|
|
AC_DEFINE(_POSIX_SOURCE)
|
|
if test -n "$GCC"; then
|
|
CC="$CC -posix"
|
|
else
|
|
CC="$CC -Xp"
|
|
fi
|
|
fi
|
|
])dnl
|
|
dnl
|
|
define(AC_XENIX_DIR,
|
|
[AC_REQUIRE([AC_DIR_HEADER])AC_CHECKING(for Xenix)
|
|
AC_PROGRAM_EGREP(yes,
|
|
[#if defined(M_XENIX) && !defined(M_UNIX)
|
|
yes
|
|
#endif
|
|
], XENIX=1)
|
|
if test -n "$XENIX"; then
|
|
LIBS="$LIBS -lx"
|
|
case "$DEFS" in
|
|
*SYSNDIR*) ;;
|
|
*) LIBS="-ldir $LIBS" ;; # Make sure -ldir precedes any -lx.
|
|
esac
|
|
fi
|
|
])dnl
|
|
dnl
|
|
define(AC_SCO_INTL,
|
|
[AC_HAVE_LIBRARY(intl, LIBS="$LIBS -lintl")
|
|
])dnl
|
|
dnl
|
|
define(AC_IRIX_SUN,
|
|
[AC_HAVE_LIBRARY(sun, LIBS="$LIBS -lsun")
|
|
])dnl
|
|
dnl
|
|
define(AC_DYNIX_SEQ,
|
|
[AC_HAVE_LIBRARY(seq, LIBS="$LIBS -lseq")
|
|
])dnl
|
|
dnl
|
|
define(AC_STAT_MACROS_BROKEN,[AC_CHECKING(for broken stat file mode macros)
|
|
AC_PROGRAM_EGREP([You lose], [#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#ifdef S_ISBLK
|
|
#if S_ISBLK (S_IFDIR)
|
|
You lose.
|
|
#endif
|
|
#ifdef S_IFCHR
|
|
#if S_ISBLK (S_IFCHR)
|
|
You lose.
|
|
#endif
|
|
#endif /* S_IFCHR */
|
|
#endif /* S_ISBLK */
|
|
#ifdef S_ISLNK
|
|
#if S_ISLNK (S_IFREG)
|
|
You lose.
|
|
#endif
|
|
#endif /* S_ISLNK */
|
|
#ifdef S_ISSOCK
|
|
#if S_ISSOCK (S_IFREG)
|
|
You lose.
|
|
#endif
|
|
#endif /* S_ISSOCK */
|
|
], AC_DEFINE(STAT_MACROS_BROKEN))])dnl
|
|
dnl
|
|
dnl
|
|
define(AC_SYS_SIGLIST_DECLARED,[dnl
|
|
AC_COMPILE_CHECK(sys_siglist declaration in signal.h or unistd.h,
|
|
[#include <signal.h>
|
|
/* NetBSD declares sys_siglist in <unistd.h>. */
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif], [char *msg = *(sys_siglist + 1);],
|
|
AC_DEFINE(SYS_SIGLIST_DECLARED))])dnl
|
|
dnl
|