[XS] Change in coreboot[main]: [test] add some warnings to Makefile

[Elyes Haouas (Code Review)]

Elyes Haouas has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/85596?usp=email )

Change subject: [test] add some warnings to Makefile
......................................................................

[test] add some warnings to Makefile

Change-Id: I2cc91d0b8b8ef0cc44954b4712dde8c486787467
Signed-off-by: Elyes Haouas 
---
M Makefile.mk
1 file changed, 1 insertion(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/96/85596/1

diff --git a/Makefile.mk b/Makefile.mk
index ca79d05..51dc3bd 100644
--- a/Makefile.mk
+++ b/Makefile.mk
@@ -534,7 +534,7 @@
 CFLAGS_common += -Wstring-compare
 ifeq ($(CONFIG_COMPILER_GCC),y)
 CFLAGS_common += -Wold-style-declaration
-CFLAGS_common += -Wcast-function-type
+CFLAGS_common += -Wcast-function-type -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations
 # Don't add these GCC specific flags when running scan-build
 ifeq ($(CCC_ANALYZER_OUTPUT_FORMAT),)
 CFLAGS_common += -Wno-packed-not-aligned