AC_MSG_CHECKING(for more warnings)
if test "$GCC" = "yes" -a "$set_more_warnings" != "no"; then
AC_MSG_RESULT(yes)
- CFLAGS="-Wall -std=gnu89 $CFLAGS"
+ CFLAGS_SAVED="$CFLAGS"
+ CFLAGS_MORE_WARNINGS="-Wall -std=gnu89"
dnl clang only warns about unknown warnings, unless
dnl called with "-Werror=unknown-warning-option"
dnl Test if the compiler supports that, and if it does
dnl attach it to the CFLAGS.
- SAVE_CFLAGS="$CFLAGS"
- EXTRA_CFLAGS="-Werror=unknown-warning-option"
- CFLAGS="$SAVE_CFLAGS $EXTRA_CFLAGS"
+ CFLAGS_EXTRA="-Werror=unknown-warning-option"
+ CFLAGS="$CFLAGS_MORE_WARNINGS $CFLAGS_EXTRA $CFLAGS_SAVED"
AC_TRY_COMPILE([], [],
has_option=yes,
has_option=no,)
if test $has_option = no; then
- EXTRA_CFLAGS=
+ CFLAGS_EXTRA=
fi
- CFLAGS="$SAVE_CFLAGS"
unset has_option
- unset SAVE_CFLAGS
for option in -Wshadow -Wmissing-declarations -Wmissing-prototypes \
-Wdeclaration-after-statement -Wformat-security \
-Wundef -Wimplicit-function-declaration \
-Wpointer-arith -Winit-self \
-Wmissing-include-dirs -Waggregate-return; do
- SAVE_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $EXTRA_CFLAGS $option"
+ CFLAGS="$CFLAGS_MORE_WARNINGS $CFLAGS_EXTRA $option $CFLAGS_SAVED"
AC_MSG_CHECKING([whether gcc understands $option])
AC_TRY_COMPILE([], [],
has_option=yes,
has_option=no,)
- if test $has_option = no; then
- CFLAGS="$SAVE_CFLAGS"
- else
- CFLAGS="$SAVE_CFLAGS $option"
+ if test $has_option != no; then
+ CFLAGS_MORE_WARNINGS="$CFLAGS_MORE_WARNINGS $option"
fi
AC_MSG_RESULT($has_option)
unset has_option
- unset SAVE_CFLAGS
done
unset option
- unset EXTRA_CFLAGS
+ unset CFLAGS_EXTRA
if test "x$set_more_warnings" = xerror; then
- CFLAGS="$CFLAGS -Werror"
+ CFLAGS_MORE_WARNINGS="$CFLAGS_MORE_WARNINGS -Werror"
fi
+ CFLAGS="$CFLAGS_MORE_WARNINGS $CFLAGS_SAVED"
+ unset CFLAGS_SAVED
else
AC_MSG_RESULT(no)
fi