dnl GIMP_DETECT_CFLAGS(RESULT, FLAGSET)
dnl Detect if the compiler supports a set of flags
AC_DEFUN([GIMP_DETECT_CFLAGS],
[
$1=
for flag in $2; do
if test -z "[$]$1"; then
$1_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror $flag"
AC_MSG_CHECKING([whether [$]CC understands [$]flag])
AC_TRY_COMPILE([], [], [$1_works=yes], [$1_works=no])
AC_MSG_RESULT([$]$1_works)
CFLAGS="[$]$1_save_CFLAGS"
if test "x[$]$1_works" = "xyes"; then
$1="$flag"
fi
done
])
