diff mbox series

[Openvpn-devel,v2] configure.ac: Make ACL_CHECK_ADD_COMPILE_FLAGS append instead of prepend

Message ID 20250923122006.12212-1-gert@greenie.muc.de
State New
Headers show
Series [Openvpn-devel,v2] configure.ac: Make ACL_CHECK_ADD_COMPILE_FLAGS append instead of prepend | expand

Commit Message

Gert Doering Sept. 23, 2025, 12:20 p.m. UTC 
From: Frank Lichtenheld <frank@lichtenheld.com>

The prepend behavior is surprising. If there is a difference
in behavior at least make it easy to understand what happens
why.

Change-Id: I1ce408d4473874d88a348308503527ef7eb8c1ff
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1204
---

This change was reviewed on Gerrit and approved by at least one
developer. I request to merge it to master.

Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1204
This mail reflects revision 2 of this Change.

Acked-by according to Gerrit (reflected above):
Gert Doering <gert@greenie.muc.de>

Comments

Gert Doering Sept. 23, 2025, 12:56 p.m. UTC | #1 
So, as discussed on IRC, this is not really intended to "change anything
noticeable" - but when working on adding CFLAGS and generally autoconf
related, it helps when "add this to CFLAGS" does not "it will show up
in front" (because your mental model expects this "at the end").

Tested, -W arguments and -g/-O2/-std=c11 are in reverse order, everything
else is the same.

Your patch has been applied to the master branch.

commit 9bfd4d246c50743c8ff9cdb72afc8741eab91f03
Author: Frank Lichtenheld
Date:   Tue Sep 23 14:20:00 2025 +0200

     configure.ac: Make ACL_CHECK_ADD_COMPILE_FLAGS append instead of prepend

     Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
     Acked-by: Gert Doering <gert@greenie.muc.de>
     Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1204
     Message-Id: <20250923122006.12212-1-gert@greenie.muc.de>
     URL: https://sourceforge.net/p/openvpn/mailman/message/59237450/
     Signed-off-by: Gert Doering <gert@greenie.muc.de>


--
kind regards,

Gert Doering
diff mbox series

Patch

diff --git a/configure.ac b/configure.ac
index a5485b0..c2feeea 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1388,9 +1388,9 @@ 
 # required for gcc, but some compilers such as clang need it.
 AC_DEFUN([ACL_CHECK_ADD_COMPILE_FLAGS], [
     old_cflags="$CFLAGS"
-    CFLAGS="$1 -Werror $CFLAGS"
+    CFLAGS="-Werror $CFLAGS $1"
     AC_MSG_CHECKING([whether the compiler accepts $1])
-    AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [AC_MSG_RESULT([yes])]; CFLAGS="$1 $old_cflags",
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [AC_MSG_RESULT([yes])]; CFLAGS="$old_cflags $1",
         [AC_MSG_RESULT([no]); CFLAGS="$old_cflags"])]
 )