make: use KConfiglib

Signed-off-by: Daniel Braunwarth <[email protected]>

Makefile

@@ -200,6 +200,7 @@ $(call set_if_default_or_unset,PKG_CONFIG,pkg-config)
 AWK		= awk
 INSTALLKERNEL  := installkernel
 PERL		= perl
+PYTHON		= python3
 
 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
 		  -Wbitwise -Wno-return-void $(CF)
@@ -226,6 +227,9 @@ KBUILD_AFLAGS   := -D__ASSEMBLY__
 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
 
+# KConfiglib
+KCONFIGLIB = $(srctree)/scripts/KConfiglib
+
 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 export CPP AR NM STRIP OBJCOPY OBJDUMP
 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
@@ -316,13 +320,13 @@ ifeq ($(config-targets),1)
 #include $(srctree)/arch/$(SRCARCH)/Makefile
 export KBUILD_DEFCONFIG KBUILD_KCONFIG
 
-config: scripts_basic outputmakefile FORCE
+%config: scripts_basic outputmakefile FORCE
 	$(Q)mkdir -p include/linux include/config
-	$(Q)$(MAKE) $(build)=scripts/kconfig $@
+	$(Q)$(PYTHON) $(KCONFIGLIB)/$@.py
 
-%config: scripts_basic outputmakefile FORCE
+%_defconfig: scripts_basic outputmakefile FORCE
 	$(Q)mkdir -p include/linux include/config
-	$(Q)$(MAKE) $(build)=scripts/kconfig $@
+	$(Q)$(PYTHON) $(KCONFIGLIB)/defconfig.py $(srctree)/configs/$@
 
 else
 
@@ -344,8 +348,10 @@ $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 # we execute the config step to be sure to catch updated Kconfig files
 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
-	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
-
+	$(Q)mkdir -p $(srctree)/include/config $(srctree)/include/generated
+	$(Q)$(PYTHON) $(KCONFIGLIB)/genconfig.py \
+		--header-path $(srctree)/include/generated/autoconf.h \
+		--sync-deps $(srctree)/include/config
 
 else
 # Dummy target needed, because used as prerequisite