build: Use -Wshadow compiler option

diff --git a/acinclude.m4 b/acinclude.m4
index 329c6a9..e1aee2e 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -15,7 +15,7 @@ AC_DEFUN([COMPILER_FLAGS], [
                CFLAGS="-Wall -O2 -D_FORTIFY_SOURCE=2"
        fi
        if (test "$USE_MAINTAINER_MODE" = "yes"); then
-               CFLAGS+=" -Werror -Wextra"
+               CFLAGS+=" -Werror -Wextra -Wshadow"
                CFLAGS+=" -Wno-unused-parameter"
                CFLAGS+=" -Wno-missing-field-initializers"
                CFLAGS+=" -Wdeclaration-after-statement"