CFLAGS: Enable more hardening

-fstack-protector-strong is available since GCC 4.9

-D_FORTIFY_SOURCE=2 is automatically enabled in IPFire since
GCC 4.9 and when optimization is enabled (e.g. -O2).

diff --git a/macros/cflags.macro b/macros/cflags.macro
index a2c583c5bc7eb95a7b1848d71f1da98d9530c277..52a069a711be91f6cb5e173abde42657c5b03a85 100644 (file)
--- a/macros/cflags.macro
+++ b/macros/cflags.macro
@@ -1,7 +1,8 @@
 
 # Export CFLAGS + CXXFLAGS
-GLOBAL_CFLAGS   = -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fPIC
-GLOBAL_CFLAGS  += -fstack-protector-all --param=ssp-buffer-size=4
+GLOBAL_CFLAGS   = -O2 -g -pipe -Wall -Werror=format-security
+GLOBAL_CFLAGS  += -fexceptions -fPIC -fstack-protector-strong --param=ssp-buffer-size=4
+GLOBAL_CFLAGS  += -grecord-gcc-switches
 
 CFLAGS_i686     = -m32 -march=i686 -mtune=atom -fasynchronous-unwind-tables
 CFLAGS_x86_64   = -m64 -mtune=generic