kbuild: full dependency check on asm-offsets.h

[safe/jmp/linux-2.6] / Kbuild

diff --git a/Kbuild b/Kbuild
new file mode 100644 (file)
index 0000000..197ece8
--- /dev/null
+++ b/Kbuild
@@ -0,0 +1,41 @@
+#
+# Kbuild for top-level directory of the kernel
+# This file takes care of the following:
+# 1) Generate asm-offsets.h
+
+#####
+# 1) Generate asm-offsets.h 
+#
+
+offsets-file := include/asm-$(ARCH)/asm-offsets.h
+
+always  := $(offsets-file)
+targets := $(offsets-file)
+targets += arch/$(ARCH)/kernel/asm-offsets.s
+
+quiet_cmd_offsets = GEN     $@
+define cmd_offsets
+       cat $< | \
+       (set -e; \
+        echo "#ifndef __ASM_OFFSETS_H__"; \
+        echo "#define __ASM_OFFSETS_H__"; \
+        echo "/*"; \
+        echo " * DO NOT MODIFY."; \
+        echo " *"; \
+        echo " * This file was generated by $(srctree)/Kbuild"; \
+        echo " *"; \
+        echo " */"; \
+        echo ""; \
+        sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
+        echo ""; \
+        echo "#endif" ) > $@
+endef
+
+# We use internal kbuild rules to avoid the "is up to date" message from make
+arch/$(ARCH)/kernel/asm-offsets.s: arch/$(ARCH)/kernel/asm-offsets.c FORCE
+       $(Q)mkdir -p $(dir $@)
+       $(call if_changed_dep,cc_s_c)
+
+$(srctree)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild
+       $(call cmd,offsets)
+