DeforaNetworks/fwknop
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added FKO_CHECK_COMPILER_ARG_LDFLAGS_ONLY to fix ro-relocations and immediate binding protection compliation warnings on FreeBSD

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This commit is contained in:
Michael Rash 2012-01-02 15:26:42 -05:00
parent 6f6a9d727d
commit 9dae73d972
1 changed files with 32 additions and 2 deletions
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34
configure.ac
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@ -77,6 +77,36 @@ int main(void){char x[[256]]; snprintf(x, sizeof(x), "NNN"); return 0;}
LDFLAGS="$saved_LDFLAGS"]
)])dnl
dnl FKO_CHECK_COMPILER_ARG_LDFLAGS_ONLY([COMPILER FLAG])
dnl
dnl Macro to check compiler support for the given compiler option.
dnl Adds to LDFLAGS only if supported.
dnl
AC_DEFUN([FKO_CHECK_COMPILER_ARG_LDFLAGS_ONLY], [
saved_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS $1 -Werror"
AC_MSG_CHECKING([if $CC supports $1])
AC_LINK_IFELSE(
[AC_LANG_SOURCE([
#include <stdio.h>
int main(void){char x[[256]]; snprintf(x, sizeof(x), "NNN"); return 0;}
])],
[
LDFLAGS="$saved_LDFLAGS $1"
AC_RUN_IFELSE(
[AC_LANG_SOURCE([
#include <stdio.h>
int main(void){char x[[256]]; snprintf(x, sizeof(x), "NNN"); return 0;}
])],
[AC_MSG_RESULT(yes)],
[AC_MSG_RESULT(no)
LDFLAGS="$saved_LDFLAGS"],
[AC_MSG_WARN([cross compiling: cannot test])])
],
[AC_MSG_RESULT(no)
LDFLAGS="$saved_LDFLAGS"]
)])dnl
AC_GNU_SOURCE
AC_PROG_CC
@ -159,7 +189,7 @@ AC_ARG_ENABLE([ro-relocations],
[])
if test "x$use_ro_relocations" = "xyes"; then
FKO_CHECK_COMPILER_ARG([-Wl,-z,relro])
FKO_CHECK_COMPILER_ARG_LDFLAGS_ONLY([-Wl,-z,relro])
fi
dnl Decide whether or not to use immediate binding protection
@ -172,7 +202,7 @@ AC_ARG_ENABLE([immediate-binding],
[])
if test "x$use_immediate_binding" = "xyes"; then
FKO_CHECK_COMPILER_ARG([-Wl,-z,now])
FKO_CHECK_COMPILER_ARG_LDFLAGS_ONLY([-Wl,-z,now])
fi
# Checks for header files.