add -fvisibility=hidden to CC flags, mark XXX_main functions
EXTERNALLY_VISIBLE. 5% size reduction of libbusybox.so
diff --git a/Makefile.flags b/Makefile.flags
index 243f095..c023299 100644
--- a/Makefile.flags
+++ b/Makefile.flags
@@ -56,10 +56,13 @@
CFLAGS += $(call cc-option,-g)
endif
+ifeq ($(CONFIG_BUILD_LIBBUSYBOX),y)
# on i386: 14% smaller libbusybox.so
# (code itself is 9% bigger, we save on relocs/PLT/GOT)
-ifeq ($(CONFIG_BUILD_LIBBUSYBOX),y)
CFLAGS += -fpic
+# and another 4% reduction of libbusybox.so:
+# (external entry points must be marked EXTERNALLY_VISIBLE)
+CFLAGS += $(call cc-option,-fvisibility=hidden)
endif
ifeq ($(CONFIG_STATIC),y)