Commit 53bf2d0f authored Jan 19, 2017 by Daniel Verkamp

build: enable -fno-common



This flag prevents the compiler from merging multiple tenative global
variable declarations (e.g. 'int i;' without an assignment) into a
single copy later.  In the default (-fcommon) mode, this allows multiple
definitions of an uninitialized global variable to be linked into a
single program without any warnings.

Change-Id: I0339012a7164dccd311ab1f62d11111d24529fbd
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>

parent 96b1f7e0

mk/spdk.common.mk

+3 −0

Original line number	Diff line number	Diff line
		@@ -64,6 +64,9 @@ COMMON_CFLAGS += -fPIC
		# Enable stack buffer overflow checking
		COMMON_CFLAGS += -fstack-protector

		# Prevent accidental multiple definitions of global variables
		COMMON_CFLAGS += -fno-common

		# Enable full RELRO - no lazy relocation (resolve everything at load time).
		# This allows the GOT to be made read-only early in the loading process.
		LDFLAGS += -Wl,-z,relro,-z,now