X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-uboot.git;a=blobdiff_plain;f=Kbuild;h=e2e3b2995f16ef68abaef1d15acd8d4aa1ef6eb4;hp=ef97787bf45945ee22803325a641d13b9c4468d9;hb=3a926a304b9f7a74dbe67ae7dc4cb6c7a174c6c0;hpb=fe5d1abcf47b2419f69d722deea902c0d44842e7

diff --git a/Kbuild b/Kbuild
index ef97787bf4..e2e3b2995f 100644
--- a/Kbuild
+++ b/Kbuild
@@ -4,39 +4,47 @@
 # 1) Generate generic-asm-offsets.h
 # 2) Generate asm-offsets.h
 
-#####
-# 1) Generate generic-asm-offsets.h
-
-generic-offsets-file := include/generated/generic-asm-offsets.h
-
-always  := $(generic-offsets-file)
-targets := $(generic-offsets-file) lib/asm-offsets.s
+# Default sed regexp - multiline due to syntax constraints
+define sed-y
+	"s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \
+	/^->/{s:->#\(.*\):/* \1 */:; \
+	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
+	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
+	s:->::; p;}"
+endef
 
-quiet_cmd_generic-offsets = GEN     $@
-define cmd_generic-offsets
+# Use filechk to avoid rebuilds when a header changes, but the resulting file
+# does not
+define filechk_offsets
 	(set -e; \
-	 echo "#ifndef __GENERIC_ASM_OFFSETS_H__"; \
-	 echo "#define __GENERIC_ASM_OFFSETS_H__"; \
+	 echo "#ifndef $2"; \
+	 echo "#define $2"; \
 	 echo "/*"; \
 	 echo " * DO NOT MODIFY."; \
 	 echo " *"; \
 	 echo " * This file was generated by Kbuild"; \
-	 echo " *"; \
 	 echo " */"; \
 	 echo ""; \
-	 sed -ne $(sed-y) $<; \
+	 sed -ne $(sed-y); \
 	 echo ""; \
-	 echo "#endif" ) > $@
+	 echo "#endif" )
 endef
 
+#####
+# 1) Generate generic-asm-offsets.h
+
+generic-offsets-file := include/generated/generic-asm-offsets.h
+
+always  := $(generic-offsets-file)
+targets := lib/asm-offsets.s
+
 # We use internal kbuild rules to avoid the "is up to date" message from make
 lib/asm-offsets.s: lib/asm-offsets.c FORCE
 	$(Q)mkdir -p $(dir $@)
 	$(call if_changed_dep,cc_s_c)
 
-$(obj)/$(generic-offsets-file): lib/asm-offsets.s Kbuild
-	$(Q)mkdir -p $(dir $@)
-	$(call cmd,generic-offsets)
+$(obj)/$(generic-offsets-file): lib/asm-offsets.s FORCE
+	$(call filechk,offsets,__GENERIC_ASM_OFFSETS_H__)
 
 #####
 # 2) Generate asm-offsets.h
@@ -47,42 +55,14 @@ offsets-file := include/generated/asm-offsets.h
 endif
 
 always  += $(offsets-file)
-targets += $(offsets-file)
 targets += arch/$(ARCH)/lib/asm-offsets.s
 
-
-# Default sed regexp - multiline due to syntax constraints
-define sed-y
-	"s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \
-	/^->/{s:->#\(.*\):/* \1 */:; \
-	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
-	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
-	s:->::; p;}"
-endef
-
 CFLAGS_asm-offsets.o := -DDO_DEPS_ONLY
 
-quiet_cmd_offsets = GEN     $@
-define cmd_offsets
-	(set -e; \
-	 echo "#ifndef __ASM_OFFSETS_H__"; \
-	 echo "#define __ASM_OFFSETS_H__"; \
-	 echo "/*"; \
-	 echo " * DO NOT MODIFY."; \
-	 echo " *"; \
-	 echo " * This file was generated by Kbuild"; \
-	 echo " *"; \
-	 echo " */"; \
-	 echo ""; \
-	 sed -ne $(sed-y) $<; \
-	 echo ""; \
-	 echo "#endif" ) > $@
-endef
-
 # We use internal kbuild rules to avoid the "is up to date" message from make
 arch/$(ARCH)/lib/asm-offsets.s: arch/$(ARCH)/lib/asm-offsets.c FORCE
 	$(Q)mkdir -p $(dir $@)
 	$(call if_changed_dep,cc_s_c)
 
-$(obj)/$(offsets-file): arch/$(ARCH)/lib/asm-offsets.s Kbuild
-	$(call cmd,offsets)
+$(obj)/$(offsets-file): arch/$(ARCH)/lib/asm-offsets.s FORCE
+	$(call filechk,offsets,__ASM_OFFSETS_H__)