build: Add -Wsign-compare to GCC flags

diff --git a/configure.ac b/configure.ac
index f190672..9862761 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -417,7 +417,7 @@ AM_CONDITIONAL(BUILD_SETBACKLIGHT, test "x$enable_setbacklight" = "xyes")
 if test "x$GCC" = "xyes"; then
        GCC_CFLAGS="-Wall -Wextra -Wno-unused-parameter \
                -Wno-missing-field-initializers -g -fvisibility=hidden \
-               -Wstrict-prototypes -Wmissing-prototypes"
+               -Wstrict-prototypes -Wmissing-prototypes -Wsign-compare"
 fi
 AC_SUBST(GCC_CFLAGS)