build: filter out more autogenerated kernel config options

Define wildcard patterns for filtering in target/linux/generic/config-filter
Preparation for supporting newer kernels

Signed-off-by: Felix Fietkau <[email protected]>

include/kernel-build.mk

@@ -170,9 +170,7 @@ define BuildKernel
 		) \
 		YACC=$(STAGING_DIR_HOST)/bin/bison \
 		$$@
-	$(LINUX_RECONF_DIFF) $(LINUX_DIR)/.config | \
-		grep -vE '(CONFIG_CC_(HAS_ASM_GOTO|IS_GCC|IS_CLANG)|GCC_VERSION)=' \
-		> $(LINUX_RECONFIG_TARGET)
+	$(call LINUX_RECONF_DIFF,$(LINUX_DIR)/.config) > $(LINUX_RECONFIG_TARGET)
 
   install: $(LINUX_DIR)/.image
 	+$(MAKE) -C image compile install TARGET_BUILD=

include/target.mk

@@ -185,11 +185,11 @@ ifeq ($(CONFIG_TARGET),env)
   LINUX_RECONFIG_TARGET = $(TOPDIR)/env/kernel-config
 endif
 
-__linux_confcmd = $(SCRIPT_DIR)/kconfig.pl $(2) $(patsubst %,+,$(wordlist 2,9999,$(1))) $(1)
+__linux_confcmd = $(2) $(patsubst %,+,$(wordlist 2,9999,$(1))) $(1)
 
-LINUX_CONF_CMD = $(call __linux_confcmd,$(LINUX_KCONFIG_LIST),)
-LINUX_RECONF_CMD = $(call __linux_confcmd,$(LINUX_RECONFIG_LIST),)
-LINUX_RECONF_DIFF = $(call __linux_confcmd,$(filter-out $(LINUX_RECONFIG_TARGET),$(LINUX_RECONFIG_LIST)),'>')
+LINUX_CONF_CMD = $(SCRIPT_DIR)/kconfig.pl $(call __linux_confcmd,$(LINUX_KCONFIG_LIST))
+LINUX_RECONF_CMD = $(SCRIPT_DIR)/kconfig.pl $(call __linux_confcmd,$(LINUX_RECONFIG_LIST))
+LINUX_RECONF_DIFF = $(SCRIPT_DIR)/kconfig.pl - '>' $(call __linux_confcmd,$(filter-out $(LINUX_RECONFIG_TARGET),$(LINUX_RECONFIG_LIST))) $(1) $(GENERIC_PLATFORM_DIR)/config-filter
 
 ifeq ($(DUMP),1)
   BuildTarget=$(BuildTargets/DumpCurrent)

target/linux/generic/config-filter

@@ -0,0 +1,7 @@
+# CONFIG_ARCH_(ENABLE|HAS|HAVE|INLINE|SUPPORTS|USE|WANT)_.* is not set
+# CONFIG_AS_.* is not set
+# CONFIG_CC_(CAN|HAS|IS|VERSION)_.* is not set
+# CONFIG_LD_.* is not set
+# CONFIG_GCC_VERSION is not set
+# CONFIG_INLINE_.* is not set
+# CONFIG_HAVE_(?!(ARCH_TIMER|TCM|SMP)).* is not set