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