[Minios-devel] [UNIKRAFT PATCH 07/13] build: Add a makefile function to check and set flags for valid gcc

[Wei Chen <Wei.Chen@xxxxxxx>]

Some times, we will add special flags to GCC to do optimization. For
instance, we can use this function to check valid GCC and set flags
to do processors optimization. In order to avoid any definition
clashes, we define this function in support/build/Makefile.rules.

Signed-off-by: Wei Chen <Wei.Chen@xxxxxxx>
---
 support/build/Makefile.rules | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/support/build/Makefile.rules b/support/build/Makefile.rules
index 2ac729a..ba6f14d 100644
--- a/support/build/Makefile.rules
+++ b/support/build/Makefile.rules
@@ -42,6 +42,15 @@ $(if $(call test_gcc_version,$(1),$(2)),,\
      $(error Require GCC version >= $(1).$(2) found 
$(CC_VER_MAJOR).$(CC_VER_MINOR)))
 endef
 
+# set_flags_for_valid_gcc $march,$gcc_major,$gcc_minor,$flags
+define set_flags_for_valid_gcc =
+ifeq ($(1),y)
+$(if $(1),$(call check_valid_gcc_version,$(2),$(3)),)
+CFLAGS-$(1)   += $(4)
+CXXFLAGS-$(1) += $(4)
+endif
+endef
+
 
################################################################################
 #
 # Paths and Filenames
-- 
2.7.4


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