package/libcoap/0001-configure-only-add-Wunused-result-if-supported-by-th.patch

   1 From d5914ecbb0285aea1eb2b9432d6e91155877fd95 Mon Sep 17 00:00:00 2001
   2 From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
   3 Date: Thu, 9 Jun 2016 21:53:59 +0200
   4 Subject: [PATCH] configure: only add -Wunused-result if supported by the
   5  compiler
   6
   7 Old gcc versions such as 4.3.x do not support -Wunused-result, so
   8 instead of unconditionally using this warning, only use it if supported
   9 by the compiler.
  10
  11 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
  12 ---
  13 Submitted upstream: https://github.com/obgm/libcoap/pull/32
  14
  15  configure.ac | 2 +-
  16  1 file changed, 1 insertion(+), 1 deletion(-)
  17
  18 diff --git a/configure.ac b/configure.ac
  19 index f4452ac..6354fcf 100644
  20 --- a/configure.ac
  21 +++ b/configure.ac
  22 @@ -110,12 +110,12 @@ WARNING_CFLAGS="\
  23  -Wswitch-default \
  24  -Wswitch-enum \
  25  -Wunused \
  26 --Wunused-result \
  27  "
  28
  29  # check whether or not the compiler supports -Wlogical-op (clang does not...)
  30  AX_CHECK_COMPILE_FLAG([-Wlogical-op], [WARNING_CFLAGS="$WARNING_CFLAGS -Wlogical-op"],,[-Werror])
  31  AX_CHECK_COMPILE_FLAG([-fdiagnostics-color], [CFLAGS="$CFLAGS -fdiagnostics-color"],,[-Werror])
  32 +AX_CHECK_COMPILE_FLAG([-Wunused-result], [WARNING_CFLAGS="$WARNING_CFLAGS -Wunused-result"])
  33
  34  AC_SUBST([WARNING_CFLAGS])
  35
  36 --
  37 2.7.4
  38