[XS] Change in coreboot[master]: Makefile: Update build for include-what-you-use

[Martin L Roth (Code Review)]

Martin L Roth has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/77192?usp=email )

Change subject: Makefile: Update build for include-what-you-use
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Makefile: Update build for include-what-you-use

This patch saves the output of the IWYU build into $(obj)/iwyu.txt. It
will also automatically adds -k to the MAKEFLAFGS when IWYU is selected,
so that the build doesn't halt after the first operation.

When IWYU is not selected, there is no change to the build.

This will allow us to create an automated IWYU build on jenkins.

Signed-off-by: Martin Roth 
Change-Id: I0ea300d4c64bb923e9f7cc0e595885c3006ec3ca
---
M Makefile
1 file changed, 6 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/92/77192/1

diff --git a/Makefile b/Makefile
index 9f0b679..fac1dca 100644
--- a/Makefile
+++ b/Makefile
@@ -316,6 +316,11 @@
 # Eliminate duplicate mentions of source files in a class
 $(foreach class,$(classes),$(eval $(class)-srcs:=$(sort $($(class)-srcs))))

+ifeq ($(CONFIG_IWYU),y)
+MAKEFLAGS += -k
+SAVE_IWYU_OUTPUT := 2>&1 | grep "should|#include|---|include-list|^[[:blank:]]?'" | tee -a $$(obj)/iwyu.txt
+endif
+
 # Build Kconfig .ads if necessary
 ifeq ($(CONFIG_ROMSTAGE_ADA),y)
 romstage-srcs += $(obj)/romstage/$(notdir $(KCONFIG_AUTOADS))
@@ -382,7 +387,7 @@
    @printf "    CC         $$$$(subst $$$$(obj)/,,$$$$(@))\n"
    $(CC_$(1)) \
    	-MMD $$$$(CPPFLAGS_$(1)) $$$$(CFLAGS_$(1)) -MT $$$$(@) \
-		$(3) -c -o $$$$@ $$$$<
+		$(3) -c -o $$$$@ $$$$< $(SAVE_IWYU_OUTPUT)
 end$(EMPTY)if
 en$(EMPTY)def
 end$(EMPTY)if