Config: add ROOTFILE_APPEND variable to select rootfile

also gcc on riscv64 has to different rootfile at build so make
the selection of an additional rootfile univarsal.

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

lfs/Config

@@ -282,11 +282,7 @@ define POSTBUILD
 	# $(TARGET)_rootfile : ROOTFILE with KVER replacement
 	# $(TARGET) : log result with {commented|include|added} files
 	@if [ -s "$(TARGET)_diff" ]; then \
-		if [ "$(HEADERS)" = "1" ]; then \
-			LFS_SCRIPT=$(firstword $(MAKEFILE_LIST))-headers ; \
-		else \
-			LFS_SCRIPT=$(firstword $(MAKEFILE_LIST)); \
-		fi; \
+		LFS_SCRIPT=$(firstword $(MAKEFILE_LIST))${ROOTFILE_APPEND} ; \
 		echo $(LFS_SCRIPT); \
 		ROOTFILE=$$(find -L $(DIR_SRC)/config/rootfiles/{common,packages}/{$(BUILD_ARCH),} -maxdepth 1 -type f -name $$LFS_SCRIPT 2>/dev/null | head -1); \
 		if [ "$$ROOTFILE" = "" ]; then \

lfs/gcc

@@ -69,6 +69,7 @@ ifeq "$(ROOT)" ""
   EXTRA_INSTALL =
 ifeq "$(PASS)" "A"
   TARGET = $(DIR_INFO)/$(THISAPP)-libatomic
+  ROOTFILE_APPEND = "-libatomic"
 endif
 else
 ifeq "$(PASS)" "1"

lfs/linux

@@ -54,6 +54,7 @@ else
 	HEADERS_PREFIX = /usr
 ifeq "$(HEADERS)" "1"
 	TARGET = $(DIR_INFO)/$(THISAPP)-headers
+	ROOTFILE_APPEND="-headers"
 else
 	TARGET = $(DIR_INFO)/$(THISAPP)
 endif