patches/0016-build-Enable-gcc-warnings-to-detect-non-portable-cod.patch

   1 From: Werner Koch <wk@gnupg.org>
   2 Date: Mon, 2 Jan 2017 12:59:10 +0100
   3 Subject: build: Enable gcc warnings to detect non-portable code.
   4
   5 --
   6
   7 Signed-off-by: Werner Koch <wk@gnupg.org>
   8 (cherry picked from commit c52930d11fcc52515fcc09a1085bf118411566a8)
   9 ---
  10  configure.ac | 9 +++++++++
  11  1 file changed, 9 insertions(+)
  12
  13 diff --git a/configure.ac b/configure.ac
  14 index 932c741ef..237189cf9 100644
  15 --- a/configure.ac
  16 +++ b/configure.ac
  17 @@ -1575,6 +1575,15 @@ if test "$GCC" = yes; then
  18          if test x"$_gcc_wopt" = xyes ; then
  19            mycflags="$mycflags -Wdeclaration-after-statement"
  20          fi
  21 +
  22 +        AC_MSG_CHECKING([if gcc supports -Wlogical-op and -Wvla])
  23 +        CFLAGS="-Wlogical-op -Wvla"
  24 +        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_wopt=yes,_gcc_wopt=no)
  25 +        AC_MSG_RESULT($_gcc_wopt)
  26 +        if test x"$_gcc_wopt" = xyes ; then
  27 +          mycflags="$mycflags -Wlogical-op -Wvla"
  28 +        fi
  29 +
  30      else
  31          mycflags="$mycflags -Wall"
  32      fi