Jakub Czapiga has uploaded this change for review.

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tests: Enable config override for tests

Some tests require to change kconfig symbols values to cover the code.
This patch enables one to set these vaues using <test-name>-config
variable.

Example for integer values.
timestamp-test-config += CONFIG_HAVE_MONOTONIC_TIMER=1

Example for string values. Notice escaped quotes.
spd_cache-test-config += CONFIG_SPD_CACHE_FMAP_NAME=\"SPD_CACHE_FMAP_NAME\"

Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Change-Id: I1aeb78362c2609fbefbfd91c0f58ec19ed258ee1
---
M tests/Makefile.inc
1 file changed, 21 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/37/52937/1

diff --git a/tests/Makefile.inc b/tests/Makefile.inc
index fd3cd9f..1172b8c 100644
--- a/tests/Makefile.inc
+++ b/tests/Makefile.inc
@@ -11,7 +11,7 @@
 
 TEST_DEFAULT_CONFIG = $(top)/configs/config.emulation_qemu_x86_i440fx
 TEST_DOTCONFIG = $(testobj)/.config
-TEST_KCONFIG_AUTOHEADER := $(testobj)/config.h
+TEST_KCONFIG_AUTOHEADER := $(testobj)/config.src.h
 TEST_KCONFIG_AUTOCONFIG := $(testobj)/auto.conf
 TEST_KCONFIG_DEPENDENCIES := $(testobj)/auto.conf.cmd
 TEST_KCONFIG_SPLITCONFIG := $(testobj)/config
@@ -52,7 +52,7 @@
 TEST_LDFLAGS += -no-pie
 
 # Extra attributes for unit tests, declared per test
-attributes:= srcs cflags mocks stage
+attributes:= srcs cflags config mocks stage
 
 stages:= decompressor bootblock romstage smm verstage
 stages+= ramstage rmodule postcar libagesa
@@ -83,6 +83,25 @@
 # Create actual targets for unit test binaries
 # $1 - test name
 define TEST_CC_template
+
+# Generate custom config.h redefining given symbols
+$(eval $(1)-config-file := $(obj)/$(1)/config.h)
+$($(1)-config-file): $(TEST_KCONFIG_AUTOHEADER)
+$($(1)-config-file):
+	mkdir -p $$(dir $$@)
+	printf '// File generated by tests/Makefile.inc\n// Do not change\n' > $$@
+	printf '#include <config.src.h>\n\n' >> $$@
+	for kv in $$($(1)-config); do \
+		key="`echo $$$$kv | cut -d '=' -f -1`"; \
+		value="`echo $$$$kv | cut -d '=' -f 2-`"; \
+		printf '#ifdef %s\n' "$$$$key" >> $$@; \
+		printf '#undef %s\n' "$$$$key" >> $$@; \
+		printf '#endif\n' >> $$@; \
+		printf '#define %s %s\n\n' "$$$$key" "$$$$value" >> $$@; \
+	done
+
+$($(1)-objs): TEST_CFLAGS += -I$(dir $($(1)-config-file))
+$($(1)-objs): $(obj)/$(1)/%.o: $$$$*.c  $($(1)-config-file)
 $($(1)-objs): TEST_CFLAGS+= \
 	-D__$$(shell echo $$($(1)-stage) | tr '[:lower:]' '[:upper:]')__
 $($(1)-objs): $(obj)/$(1)/%.o: $$$$*.c $(TEST_KCONFIG_AUTOHEADER)

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