6752ed90da
Preparatory patch for the source merge of arch/i386 and arch/x86_64 into arch/x86. This allows to keep the original arch directories as stubs for the main Makefiles, Kconfigs et. al during the transition phase while having the code in the new arch/x86 directory. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
1.6 KiB
Kbuild for top-level directory of the kernel
This file takes care of the following:
1) Generate asm-offsets.h
2) Check for missing system calls
1) Generate asm-offsets.h
offsets-file := include/asm-$(ARCH)/asm-offsets.h
always := $(offsets-file) targets := $(offsets-file) targets += arch/$(SRCARCH)/kernel/asm-offsets.s clean-files := $(addprefix $(objtree)/,$(targets))
Default sed regexp - multiline due to syntax constraints
define sed-y
"/^->/{s:^->[^ ]* [$$#][^ ]* .*:#define \1 \2 / \3 */:; s:->::; p;}"
endef
Override default regexp for specific architectures
sed-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ #.*$$//; p;}"
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" ) > $@
endef
We use internal kbuild rules to avoid the "is up to date" message from make
arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c FORCE $(Q)mkdir -p $(dir $@) $(call if_changed_dep,cc_s_c)
$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild $(Q)mkdir -p $(dir $@) $(call cmd,offsets)
2) Check for missing system calls
quiet_cmd_syscalls = CALL $< cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)
PHONY += missing-syscalls missing-syscalls: scripts/checksyscalls.sh FORCE $(call cmd,syscalls)