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configure.ac: Make ACL_CHECK_ADD_COMPILE_FLAGS append instead of prepend

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
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>

Frank Lichtenheld authored on 2025/09/23 21:20:00
Showing 1 changed files

configure.ac

History View file @ 9bfd4d2

@@ -1388,9 +1388,9 @@ fi
                      # 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"])]
+                     )