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# option, cache_name, variable,
# code to execute if yes, code to exectute if fail
AC_DEFUN([AC_SYS_COMPILER_FLAG],
[
AC_MSG_CHECKING($1)
OLD_CFLAGS="[$]CFLAGS"
AC_CACHE_VAL(mysql_cv_option_$2,
[
CFLAGS="[$]OLD_CFLAGS $1"
AC_TRY_LINK([int main(){exit(0);}],mysql_cv_option_$2=yes,mysql_cv_option_$2=no,mysql_cv_option_$2=no)
])
CFLAGS="[$]OLD_CFLAGS"
if test x"[$]mysql_cv_option_$2" = "xyes" ; then
$3="[$]$3 $1"
AC_MSG_RESULT(yes)
$5
else
AC_MSG_RESULT(no)
$4
fi
])
# arch, option, cache_name, variable
AC_DEFUN([AC_SYS_CPU_COMPILER_FLAG],
[
if test "`uname -m 2>/dev/null`" = "$1" ; then
AC_SYS_COMPILER_FLAG($2,$3,$4)
fi
])
# os, option, cache_name, variable
AC_DEFUN([AC_SYS_OS_COMPILER_FLAG],
[
if test "x$mysql_cv_sys_os" = "x$1" ; then
AC_SYS_COMPILER_FLAG($2,$3,$4)
fi
])
AC_DEFUN([AC_CHECK_NOEXECSTACK],
[
AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
mysql_cv_as_noexecstack, [dnl
cat > conftest.c <<EOF
void foo (void) { }
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
-S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
&& grep .note.GNU-stack conftest.s >/dev/null \
&& AC_TRY_COMMAND([${CC-cc} $CCASFLAGS $CPPFLAGS -Wa,--noexecstack
-c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
then
mysql_cv_as_noexecstack=yes
else
mysql_cv_as_noexecstack=no
fi
rm -f conftest*])
if test $mysql_cv_as_noexecstack = yes; then
CCASFLAGS="$CCASFLAGS -Wa,--noexecstack"
fi
])
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