build: Add two more warning options.

Both -Wunused-parameter and -Wshadow were added to gcc long ago. In
particular gcc-4.6.3, which ships with Ubuntu-12.04, supports them. It
should thus be safe to enable both warnings unconditionally.

diff --git a/Makefile b/Makefile
index 3c00ce47f85bc47354f33006edff75331a317eee..8adb38a2587caa28d71db200c8a7da1d7d850bc2 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,9 @@ CFLAGS += -Wformat-security
 CFLAGS += -Werror-implicit-function-declaration
 CFLAGS += -Wmissing-format-attribute
 CFLAGS += -Wunused-macros
+CFLAGS += -Wunused-parameter
 CFLAGS += -Wbad-function-cast
+CFLAGS += -Wshadow
 
 Makefile.deps: $(wildcard *.c *.h)
        gcc -MM -MG *.c > $@