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build: Check -Wlogical-op flag availability with -Werror. 

* configure.ac: Use -Werror.

--

Using clang, -Wlogical-op doesn't fail but generates warning.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2017-11-20 12:01:31 +09:00
parent e1984969ca
commit 3ecd1a41be
1 changed files with 11 additions and 3 deletions
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14
configure.ac
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@ -1612,12 +1612,20 @@ if test "$GCC" = yes; then
mycflags="$mycflags -Wdeclaration-after-statement"
fi
AC_MSG_CHECKING([if gcc supports -Wlogical-op and -Wvla])
CFLAGS="-Wlogical-op -Wvla"
AC_MSG_CHECKING([if gcc supports -Wlogical-op])
CFLAGS="-Wlogical-op -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_wopt=yes,_gcc_wopt=no)
AC_MSG_RESULT($_gcc_wopt)
if test x"$_gcc_wopt" = xyes ; then
mycflags="$mycflags -Wlogical-op -Wvla"
mycflags="$mycflags -Wlogical-op -Werror"
fi
AC_MSG_CHECKING([if gcc supports -Wvla])
CFLAGS="-Wvla"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_wopt=yes,_gcc_wopt=no)
AC_MSG_RESULT($_gcc_wopt)
if test x"$_gcc_wopt" = xyes ; then
mycflags="$mycflags -Wvla"
fi
else