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aclocal.m4
- This file was copied to m4/openssh.m4.
dnl OpenSSH-specific autoconf macros | # generated automatically by aclocal 1.16.2 -*- Autoconf -*- | ||||
dnl | |||||
dnl OSSH_CHECK_CFLAG_COMPILE(check_flag[, define_flag]) | # Copyright (C) 1996-2020 Free Software Foundation, Inc. | ||||
dnl Check that $CC accepts a flag 'check_flag'. If it is supported append | |||||
dnl 'define_flag' to $CFLAGS. If 'define_flag' is not specified, then append | |||||
dnl 'check_flag'. | |||||
AC_DEFUN([OSSH_CHECK_CFLAG_COMPILE], [{ | |||||
AC_MSG_CHECKING([if $CC supports compile flag $1]) | |||||
saved_CFLAGS="$CFLAGS" | |||||
CFLAGS="$CFLAGS $WERROR $1" | |||||
_define_flag="$2" | |||||
test "x$_define_flag" = "x" && _define_flag="$1" | |||||
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ | |||||
#include <stdlib.h> | |||||
#include <stdio.h> | |||||
int main(int argc, char **argv) { | |||||
/* Some math to catch -ftrapv problems in the toolchain */ | |||||
int i = 123 * argc, j = 456 + argc, k = 789 - argc; | |||||
float l = i * 2.1; | |||||
double m = l / 0.5; | |||||
long long int n = argc * 12345LL, o = 12345LL * (long long int)argc; | |||||
printf("%d %d %d %f %f %lld %lld\n", i, j, k, l, m, n, o); | |||||
exit(0); | |||||
} | |||||
]])], | |||||
[ | |||||
if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null | |||||
then | |||||
AC_MSG_RESULT([no]) | |||||
CFLAGS="$saved_CFLAGS" | |||||
else | |||||
AC_MSG_RESULT([yes]) | |||||
CFLAGS="$saved_CFLAGS $_define_flag" | |||||
fi], | |||||
[ AC_MSG_RESULT([no]) | |||||
CFLAGS="$saved_CFLAGS" ] | |||||
) | |||||
}]) | |||||
dnl OSSH_CHECK_CFLAG_LINK(check_flag[, define_flag]) | # This file is free software; the Free Software Foundation | ||||
dnl Check that $CC accepts a flag 'check_flag'. If it is supported append | # gives unlimited permission to copy and/or distribute it, | ||||
dnl 'define_flag' to $CFLAGS. If 'define_flag' is not specified, then append | # with or without modifications, as long as this notice is preserved. | ||||
dnl 'check_flag'. | |||||
AC_DEFUN([OSSH_CHECK_CFLAG_LINK], [{ | |||||
AC_MSG_CHECKING([if $CC supports compile flag $1 and linking succeeds]) | |||||
saved_CFLAGS="$CFLAGS" | |||||
CFLAGS="$CFLAGS $WERROR $1" | |||||
_define_flag="$2" | |||||
test "x$_define_flag" = "x" && _define_flag="$1" | |||||
AC_LINK_IFELSE([AC_LANG_SOURCE([[ | |||||
#include <stdlib.h> | |||||
#include <stdio.h> | |||||
int main(int argc, char **argv) { | |||||
/* Some math to catch -ftrapv problems in the toolchain */ | |||||
int i = 123 * argc, j = 456 + argc, k = 789 - argc; | |||||
float l = i * 2.1; | |||||
double m = l / 0.5; | |||||
long long int n = argc * 12345LL, o = 12345LL * (long long int)argc; | |||||
long long int p = n * o; | |||||
printf("%d %d %d %f %f %lld %lld %lld\n", i, j, k, l, m, n, o, p); | |||||
exit(0); | |||||
} | |||||
]])], | |||||
[ | |||||
if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null | |||||
then | |||||
AC_MSG_RESULT([no]) | |||||
CFLAGS="$saved_CFLAGS" | |||||
else | |||||
AC_MSG_RESULT([yes]) | |||||
CFLAGS="$saved_CFLAGS $_define_flag" | |||||
fi], | |||||
[ AC_MSG_RESULT([no]) | |||||
CFLAGS="$saved_CFLAGS" ] | |||||
) | |||||
}]) | |||||
dnl OSSH_CHECK_LDFLAG_LINK(check_flag[, define_flag]) | # This program is distributed in the hope that it will be useful, | ||||
dnl Check that $LD accepts a flag 'check_flag'. If it is supported append | # but WITHOUT ANY WARRANTY, to the extent permitted by law; without | ||||
dnl 'define_flag' to $LDFLAGS. If 'define_flag' is not specified, then append | # even the implied warranty of MERCHANTABILITY or FITNESS FOR A | ||||
dnl 'check_flag'. | # PARTICULAR PURPOSE. | ||||
AC_DEFUN([OSSH_CHECK_LDFLAG_LINK], [{ | |||||
AC_MSG_CHECKING([if $LD supports link flag $1]) | |||||
saved_LDFLAGS="$LDFLAGS" | |||||
LDFLAGS="$LDFLAGS $WERROR $1" | |||||
_define_flag="$2" | |||||
test "x$_define_flag" = "x" && _define_flag="$1" | |||||
AC_LINK_IFELSE([AC_LANG_SOURCE([[ | |||||
#include <stdlib.h> | |||||
#include <stdio.h> | |||||
int main(int argc, char **argv) { | |||||
/* Some math to catch -ftrapv problems in the toolchain */ | |||||
int i = 123 * argc, j = 456 + argc, k = 789 - argc; | |||||
float l = i * 2.1; | |||||
double m = l / 0.5; | |||||
long long int n = argc * 12345LL, o = 12345LL * (long long int)argc; | |||||
long long p = n * o; | |||||
printf("%d %d %d %f %f %lld %lld %lld\n", i, j, k, l, m, n, o, p); | |||||
exit(0); | |||||
} | |||||
]])], | |||||
[ | |||||
if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null | |||||
then | |||||
AC_MSG_RESULT([no]) | |||||
LDFLAGS="$saved_LDFLAGS" | |||||
else | |||||
AC_MSG_RESULT([yes]) | |||||
LDFLAGS="$saved_LDFLAGS $_define_flag" | |||||
fi ], | |||||
[ AC_MSG_RESULT([no]) | |||||
LDFLAGS="$saved_LDFLAGS" ] | |||||
) | |||||
}]) | |||||
dnl OSSH_CHECK_HEADER_FOR_FIELD(field, header, symbol) | m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])]) | ||||
dnl Does AC_EGREP_HEADER on 'header' for the string 'field' | m4_include([m4/openssh.m4]) | ||||
dnl If found, set 'symbol' to be defined. Cache the result. | |||||
dnl TODO: This is not foolproof, better to compile and read from there | |||||
AC_DEFUN(OSSH_CHECK_HEADER_FOR_FIELD, [ | |||||
# look for field '$1' in header '$2' | |||||
dnl This strips characters illegal to m4 from the header filename | |||||
ossh_safe=`echo "$2" | sed 'y%./+-%__p_%'` | |||||
dnl | |||||
ossh_varname="ossh_cv_$ossh_safe""_has_"$1 | |||||
AC_MSG_CHECKING(for $1 field in $2) | |||||
AC_CACHE_VAL($ossh_varname, [ | |||||
AC_EGREP_HEADER($1, $2, [ dnl | |||||
eval "$ossh_varname=yes" dnl | |||||
], [ dnl | |||||
eval "$ossh_varname=no" dnl | |||||
]) dnl | |||||
]) | |||||
ossh_result=`eval 'echo $'"$ossh_varname"` | |||||
if test -n "`echo $ossh_varname`"; then | |||||
AC_MSG_RESULT($ossh_result) | |||||
if test "x$ossh_result" = "xyes"; then | |||||
AC_DEFINE($3, 1, [Define if you have $1 in $2]) | |||||
fi | |||||
else | |||||
AC_MSG_RESULT(no) | |||||
fi | |||||
]) | |||||
dnl Check for socklen_t: historically on BSD it is an int, and in | |||||
dnl POSIX 1g it is a type of its own, but some platforms use different | |||||
dnl types for the argument to getsockopt, getpeername, etc. So we | |||||
dnl have to test to find something that will work. | |||||
AC_DEFUN([TYPE_SOCKLEN_T], | |||||
[ | |||||
AC_CHECK_TYPE([socklen_t], ,[ | |||||
AC_MSG_CHECKING([for socklen_t equivalent]) | |||||
AC_CACHE_VAL([curl_cv_socklen_t_equiv], | |||||
[ | |||||
# Systems have either "struct sockaddr *" or | |||||
# "void *" as the second argument to getpeername | |||||
curl_cv_socklen_t_equiv= | |||||
for arg2 in "struct sockaddr" void; do | |||||
for t in int size_t unsigned long "unsigned long"; do | |||||
AC_TRY_COMPILE([ | |||||
#include <sys/types.h> | |||||
#include <sys/socket.h> | |||||
int getpeername (int, $arg2 *, $t *); | |||||
],[ | |||||
$t len; | |||||
getpeername(0,0,&len); | |||||
],[ | |||||
curl_cv_socklen_t_equiv="$t" | |||||
break | |||||
]) | |||||
done | |||||
done | |||||
if test "x$curl_cv_socklen_t_equiv" = x; then | |||||
AC_MSG_ERROR([Cannot find a type to use in place of socklen_t]) | |||||
fi | |||||
]) | |||||
AC_MSG_RESULT($curl_cv_socklen_t_equiv) | |||||
AC_DEFINE_UNQUOTED(socklen_t, $curl_cv_socklen_t_equiv, | |||||
[type to use in place of socklen_t if not defined])], | |||||
[#include <sys/types.h> | |||||
#include <sys/socket.h>]) | |||||
]) | |||||