-AC_ARG_ENABLE(werror,
- AS_HELP_STRING([--enable-werror], [treat compile warnings as errors]),
- [case "${enableval}" in
- yes | y) ERROR_ON_WARNING="yes" ;;
- no | n) ERROR_ON_WARNING="no" ;;
- *) AC_MSG_ERROR(bad value ${enableval} for --enable-werror) ;;
- esac])
-
-# Enable -Werror by default when using gcc. Turn it off for releases.
-if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" \
- && test x"$enable_build_with_cxx" != x"yes" \
- && $development; then
- ERROR_ON_WARNING=yes
-fi
-
-WERROR_CFLAGS=""
-if test "${ERROR_ON_WARNING}" = yes ; then
- WERROR_CFLAGS="-Werror"
-fi
-
-build_warnings="-Wall -Wpointer-arith \
--Wformat-nonliteral -Wno-char-subscripts -Wempty-body"
-
-# Now add in C and C++ specific options, depending on mode.
-if test "$enable_build_with_cxx" = "yes"; then
- build_warnings="$build_warnings -Wno-sign-compare -Wno-write-strings \
--Wno-narrowing"
-else
- build_warnings="$build_warnings -Wdeclaration-after-statement"
-fi
-
-# The set of warnings supported by a C++ compiler is not the same as
-# of the C compiler.
-if test "$enable_build_with_cxx" = "yes"; then
- AC_LANG_PUSH([C++])
-fi
-
-WARN_CFLAGS=""
-if test "x$GCC" = xyes
-then
- AC_MSG_CHECKING(compiler warning flags)
- # Separate out the -Werror flag as some files just cannot be
- # compiled with it enabled.
- for w in ${build_warnings}; do
- case $w in
- -Werr*) WERROR_CFLAGS=-Werror ;;
- *)
- # Check whether GCC accepts it.
- saved_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $w"
- saved_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS $w"
- AC_TRY_COMPILE([],[],WARN_CFLAGS="${WARN_CFLAGS} $w",)
- CFLAGS="$saved_CFLAGS"
- CXXFLAGS="$saved_CXXFLAGS"
- esac
- done
- AC_MSG_RESULT(${WARN_CFLAGS} ${WERROR_CFLAGS})
-fi
-AC_SUBST(WARN_CFLAGS)
-AC_SUBST(WERROR_CFLAGS)
-
-if test "$enable_build_with_cxx" = "yes"; then
- AC_LANG_POP([C++])
-fi