mirror of
git://anongit.mindrot.org/openssh.git
synced 2024-12-17 23:54:35 +00:00
f9193f03db
Should better detect problems with gcc 13 on m68k. bz#3673 from Colin Watson via bz#3673 and https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110934 Signed-off-by: Darren Tucker <dtucker@dtucker.net>
227 lines
6.7 KiB
Plaintext
227 lines
6.7 KiB
Plaintext
dnl OpenSSH-specific autoconf macros
|
|
dnl
|
|
|
|
dnl The test program that is used to try to trigger various compiler
|
|
dnl behaviours.
|
|
AC_DEFUN([OSSH_COMPILER_FLAG_TEST_PROGRAM],
|
|
[AC_LANG_SOURCE([[
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
/* Trivial function to help test for -fzero-call-used-regs */
|
|
int f(int n) {return rand() % n;}
|
|
char *f2(char *s, ...) {
|
|
char ret[64];
|
|
va_list args;
|
|
va_start(args, s);
|
|
vsnprintf(ret, sizeof(ret), s, args);
|
|
va_end(args);
|
|
return strdup(ret);
|
|
}
|
|
int i;
|
|
double d;
|
|
const char *f3(int s) {
|
|
i = (int)d;
|
|
return s ? "good" : "gooder";
|
|
}
|
|
int main(int argc, char **argv) {
|
|
char b[256], *cp;
|
|
const char *s;
|
|
/* 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;
|
|
(void)argv;
|
|
f(1);
|
|
s = f3(f(2));
|
|
snprintf(b, sizeof b, "%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
|
|
if (write(1, b, 0) == -1) exit(0);
|
|
cp = f2("%d %d %d %f %f %lld %lld %s\n", i,j,k,l,m,n,o,s);
|
|
if (write(1, cp, 0) == -1) exit(0);
|
|
free(cp);
|
|
/*
|
|
* Test fallthrough behaviour. clang 10's -Wimplicit-fallthrough does
|
|
* not understand comments and we don't use the "fallthrough" attribute
|
|
* that it's looking for.
|
|
*/
|
|
switch(i){
|
|
case 0: j += i;
|
|
/* FALLTHROUGH */
|
|
default: j += k;
|
|
}
|
|
exit(0);
|
|
}
|
|
]])]
|
|
)
|
|
|
|
dnl OSSH_CHECK_CFLAG_COMPILE(check_flag[, define_flag])
|
|
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([OSSH_COMPILER_FLAG_TEST_PROGRAM],
|
|
[
|
|
if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
|
|
then
|
|
AC_MSG_RESULT([no])
|
|
CFLAGS="$saved_CFLAGS"
|
|
else
|
|
dnl If we are compiling natively, try running the program.
|
|
AC_RUN_IFELSE([OSSH_COMPILER_FLAG_TEST_PROGRAM],
|
|
[ AC_MSG_RESULT([yes])
|
|
CFLAGS="$saved_CFLAGS $_define_flag" ],
|
|
[ AC_MSG_RESULT([no, fails at run time])
|
|
CFLAGS="$saved_CFLAGS" ],
|
|
[ 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])
|
|
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_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([OSSH_COMPILER_FLAG_TEST_PROGRAM],
|
|
[
|
|
if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
|
|
then
|
|
AC_MSG_RESULT([no])
|
|
CFLAGS="$saved_CFLAGS"
|
|
else
|
|
dnl If we are compiling natively, try running the program.
|
|
AC_RUN_IFELSE([OSSH_COMPILER_FLAG_TEST_PROGRAM],
|
|
[ AC_MSG_RESULT([yes])
|
|
CFLAGS="$saved_CFLAGS $_define_flag" ],
|
|
[ AC_MSG_RESULT([no, fails at run time])
|
|
CFLAGS="$saved_CFLAGS" ],
|
|
[ 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])
|
|
dnl Check that $LD accepts a flag 'check_flag'. If it is supported append
|
|
dnl 'define_flag' to $LDFLAGS. If 'define_flag' is not specified, then append
|
|
dnl 'check_flag'.
|
|
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([OSSH_COMPILER_FLAG_TEST_PROGRAM],
|
|
[
|
|
if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null
|
|
then
|
|
AC_MSG_RESULT([no])
|
|
LDFLAGS="$saved_LDFLAGS"
|
|
else
|
|
dnl If we are compiling natively, try running the program.
|
|
AC_RUN_IFELSE([OSSH_COMPILER_FLAG_TEST_PROGRAM],
|
|
[ AC_MSG_RESULT([yes])
|
|
LDFLAGS="$saved_LDFLAGS $_define_flag" ],
|
|
[ AC_MSG_RESULT([no, fails at run time])
|
|
LDFLAGS="$saved_LDFLAGS" ],
|
|
[ 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)
|
|
dnl Does AC_EGREP_HEADER on 'header' for the string 'field'
|
|
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_COMPILE_IFELSE([
|
|
AC_LANG_PROGRAM([[
|
|
#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>])
|
|
])
|
|
|