forked from Minki/linux
0a227985d4
kernel/time/timeconst.h is moved to include/generated/ and generated by the top level Kbuild. This allows using timeconst.h in an earlier build stage. Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> Cc: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Joe Perches <joe@perches.com> Cc: John Stultz <john.stultz@linaro.org> Cc: Andrew Hunter <ahh@google.com> Cc: Paul Turner <pjt@google.com> Cc: Michal Marek <mmarek@suse.cz> Link: http://lkml.kernel.org/r/1431951554-5563-1-git-send-email-hofrat@osadl.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
102 lines
2.6 KiB
Makefile
102 lines
2.6 KiB
Makefile
#
|
|
# Kbuild for top-level directory of the kernel
|
|
# This file takes care of the following:
|
|
# 1) Generate bounds.h
|
|
# 2) Generate timeconst.h
|
|
# 3) Generate asm-offsets.h (may need bounds.h and timeconst.h)
|
|
# 4) Check for missing system calls
|
|
|
|
# Default sed regexp - multiline due to syntax constraints
|
|
define sed-y
|
|
"/^->/{s:->#\(.*\):/* \1 */:; \
|
|
s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
|
|
s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
|
|
s:->::; p;}"
|
|
endef
|
|
|
|
# Use filechk to avoid rebuilds when a header changes, but the resulting file
|
|
# does not
|
|
define filechk_offsets
|
|
(set -e; \
|
|
echo "#ifndef $2"; \
|
|
echo "#define $2"; \
|
|
echo "/*"; \
|
|
echo " * DO NOT MODIFY."; \
|
|
echo " *"; \
|
|
echo " * This file was generated by Kbuild"; \
|
|
echo " */"; \
|
|
echo ""; \
|
|
sed -ne $(sed-y); \
|
|
echo ""; \
|
|
echo "#endif" )
|
|
endef
|
|
|
|
#####
|
|
# 1) Generate bounds.h
|
|
|
|
bounds-file := include/generated/bounds.h
|
|
|
|
always := $(bounds-file)
|
|
targets := kernel/bounds.s
|
|
|
|
# We use internal kbuild rules to avoid the "is up to date" message from make
|
|
kernel/bounds.s: kernel/bounds.c FORCE
|
|
$(Q)mkdir -p $(dir $@)
|
|
$(call if_changed_dep,cc_s_c)
|
|
|
|
$(obj)/$(bounds-file): kernel/bounds.s FORCE
|
|
$(call filechk,offsets,__LINUX_BOUNDS_H__)
|
|
|
|
#####
|
|
# 2) Generate timeconst.h
|
|
|
|
timeconst-file := include/generated/timeconst.h
|
|
|
|
#always += $(timeconst-file)
|
|
targets += $(timeconst-file)
|
|
|
|
quiet_cmd_gentimeconst = GEN $@
|
|
define cmd_gentimeconst
|
|
(echo $(CONFIG_HZ) | bc -q $< ) > $@
|
|
endef
|
|
define filechk_gentimeconst
|
|
(echo $(CONFIG_HZ) | bc -q $< )
|
|
endef
|
|
|
|
$(obj)/$(timeconst-file): kernel/time/timeconst.bc FORCE
|
|
$(call filechk,gentimeconst)
|
|
|
|
#####
|
|
# 3) Generate asm-offsets.h
|
|
#
|
|
|
|
offsets-file := include/generated/asm-offsets.h
|
|
|
|
always += $(offsets-file)
|
|
targets += arch/$(SRCARCH)/kernel/asm-offsets.s
|
|
|
|
# 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 \
|
|
$(obj)/$(timeconst-file) $(obj)/$(bounds-file) FORCE
|
|
$(Q)mkdir -p $(dir $@)
|
|
$(call if_changed_dep,cc_s_c)
|
|
|
|
$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
|
|
$(call filechk,offsets,__ASM_OFFSETS_H__)
|
|
|
|
#####
|
|
# 4) Check for missing system calls
|
|
#
|
|
|
|
always += missing-syscalls
|
|
targets += missing-syscalls
|
|
|
|
quiet_cmd_syscalls = CALL $<
|
|
cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
|
|
|
|
missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
|
|
$(call cmd,syscalls)
|
|
|
|
# Keep these three files during make clean
|
|
no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file)
|