[S] Change in coreboot[main]: build system: Exempt `make *config` from strict symbol checks

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/79298?usp=email )

Change subject: build system: Exempt `make *config` from strict symbol checks
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build system: Exempt `make *config` from strict symbol checks

The "config" targets exist to edit the .config file, and so they
should be more forgiving with invalid configs (that they'll convert
into valid configs on save). They will still emit warnings about
invalid symbols, but not exit with an error.

The regular build process still fails if the .config looks unexpected
(for example when there's an unknown config flag).

Change-Id: If427e075766c68d493dd406609f21b6bb27d1d74
Signed-off-by: Patrick Georgi 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79298
Reviewed-by: Mike Banon 
Reviewed-by: Felix Singer 
Tested-by: build bot (Jenkins) 
Reviewed-by: Martin L Roth 
---
M Makefile
M util/kconfig/Makefile.inc
2 files changed, 6 insertions(+), 5 deletions(-)

Approvals:
  Martin L Roth: Looks good to me, approved
  Felix Singer: Looks good to me, approved
  build bot (Jenkins): Verified
  Mike Banon: Looks good to me, but someone else must approve

diff --git a/Makefile b/Makefile
index 5ed6933..d41dd4f 100644
--- a/Makefile
+++ b/Makefile
@@ -29,14 +29,17 @@
 KCONFIG_SPLITCONFIG := $(obj)/config/
 KCONFIG_TRISTATE := $(obj)/tristate.conf
 KCONFIG_NEGATIVES := 1
-KCONFIG_WERROR:= 1
-KCONFIG_WARN_UNKNOWN_SYMBOLS:= 1
+KCONFIG_WERROR := 1
+KCONFIG_WARN_UNKNOWN_SYMBOLS := 1
 KCONFIG_PACKAGE := CB.Config
 KCONFIG_MAKEFILE_REAL ?= $(objk)/Makefile.real

COREBOOT_EXPORTS += KCONFIG_CONFIG KCONFIG_AUTOHEADER KCONFIG_AUTOCONFIG
 COREBOOT_EXPORTS += KCONFIG_DEPENDENCIES KCONFIG_SPLITCONFIG KCONFIG_TRISTATE
-COREBOOT_EXPORTS += KCONFIG_NEGATIVES KCONFIG_WERROR
+COREBOOT_EXPORTS += KCONFIG_NEGATIVES
+ifeq ($(filter %config,$(MAKECMDGOALS)),)
+COREBOOT_EXPORTS += KCONFIG_WERROR
+endif
 COREBOOT_EXPORTS += KCONFIG_WARN_UNKNOWN_SYMBOLS
 COREBOOT_EXPORTS += KCONFIG_AUTOADS KCONFIG_PACKAGE

diff --git a/util/kconfig/Makefile.inc b/util/kconfig/Makefile.inc
index 3a9f353..83fad88 100644
--- a/util/kconfig/Makefile.inc
+++ b/util/kconfig/Makefile.inc
@@ -47,8 +47,6 @@

# Fill in Linux kconfig build rules to work

-oldconfig: KCONFIG_STRICT=
-
 savedefconfig: $(objk)/conf
    cp $(DOTCONFIG) $(DEFCONFIG)
    chmod +w $(DEFCONFIG)