| From d5914ecbb0285aea1eb2b9432d6e91155877fd95 Mon Sep 17 00:00:00 2001 |
| From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> |
| Date: Thu, 9 Jun 2016 21:53:59 +0200 |
| Subject: [PATCH] configure: only add -Wunused-result if supported by the |
| compiler |
| |
| Old gcc versions such as 4.3.x do not support -Wunused-result, so |
| instead of unconditionally using this warning, only use it if supported |
| by the compiler. |
| |
| Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> |
| --- |
| Submitted upstream: https://github.com/obgm/libcoap/pull/32 |
| |
| configure.ac | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| diff --git a/configure.ac b/configure.ac |
| index f4452ac..6354fcf 100644 |
| --- a/configure.ac |
| +++ b/configure.ac |
| @@ -110,12 +110,12 @@ WARNING_CFLAGS="\ |
| -Wswitch-default \ |
| -Wswitch-enum \ |
| -Wunused \ |
| --Wunused-result \ |
| " |
| |
| # check whether or not the compiler supports -Wlogical-op (clang does not...) |
| AX_CHECK_COMPILE_FLAG([-Wlogical-op], [WARNING_CFLAGS="$WARNING_CFLAGS -Wlogical-op"],,[-Werror]) |
| AX_CHECK_COMPILE_FLAG([-fdiagnostics-color], [CFLAGS="$CFLAGS -fdiagnostics-color"],,[-Werror]) |
| +AX_CHECK_COMPILE_FLAG([-Wunused-result], [WARNING_CFLAGS="$WARNING_CFLAGS -Wunused-result"]) |
| |
| AC_SUBST([WARNING_CFLAGS]) |
| |
| -- |
| 2.7.4 |
| |
