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authorLinus Torvalds <torvalds@linux-foundation.org>2015-04-15 11:19:18 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-15 11:19:18 -0700
commitb422b75875a3663f08a9ab5aeb265ed2383cbe2f (patch)
tree33e1ca04314539fd448f8f199839279798c1c163 /Kbuild
parentd488d3a4ce08e96dad5cb3b6117517d57ccec98f (diff)
parent41b585b2ed793db6f02ec87d0026d73382e8180a (diff)
Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild updates from Michal Marek: "Here is the first round of kbuild changes for v4.1-rc1: - kallsyms fix for ARM and cleanup - make dep(end) removed (developers have no sense of nostalgia these days...) - include Makefiles by relative path - stop useless rebuilds of asm-offsets.h and bounds.h" * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: Kbuild: kallsyms: drop special handling of pre-3.0 GCC symbols Kbuild: kallsyms: ignore veneers emitted by the ARM linker kbuild: ia64: use $(src)/Makefile.gate rather than particular path kbuild: include $(src)/Makefile rather than $(obj)/Makefile kbuild: use relative path more to include Makefile kbuild: use relative path to include Makefile kbuild: do not add $(bounds-file) and $(offsets-file) to targets kbuild: remove warning about "make depend" kbuild: Don't reset timestamps in include/generated if not needed
Diffstat (limited to 'Kbuild')
-rw-r--r--Kbuild21
1 files changed, 10 insertions, 11 deletions
diff --git a/Kbuild b/Kbuild
index ab8ded92e870..6f0d82a9245d 100644
--- a/Kbuild
+++ b/Kbuild
@@ -13,8 +13,9 @@ define sed-y
s:->::; p;}"
endef
-quiet_cmd_offsets = GEN $@
-define cmd_offsets
+# 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"; \
@@ -24,9 +25,9 @@ define cmd_offsets
echo " * This file was generated by Kbuild"; \
echo " */"; \
echo ""; \
- sed -ne $(sed-y) $<; \
+ sed -ne $(sed-y); \
echo ""; \
- echo "#endif" ) > $@
+ echo "#endif" )
endef
#####
@@ -35,16 +36,15 @@ endef
bounds-file := include/generated/bounds.h
always := $(bounds-file)
-targets := $(bounds-file) kernel/bounds.s
+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 Kbuild
- $(Q)mkdir -p $(dir $@)
- $(call cmd,offsets,__LINUX_BOUNDS_H__)
+$(obj)/$(bounds-file): kernel/bounds.s FORCE
+ $(call filechk,offsets,__LINUX_BOUNDS_H__)
#####
# 2) Generate asm-offsets.h
@@ -53,7 +53,6 @@ $(obj)/$(bounds-file): kernel/bounds.s Kbuild
offsets-file := include/generated/asm-offsets.h
always += $(offsets-file)
-targets += $(offsets-file)
targets += arch/$(SRCARCH)/kernel/asm-offsets.s
# We use internal kbuild rules to avoid the "is up to date" message from make
@@ -62,8 +61,8 @@ arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
$(Q)mkdir -p $(dir $@)
$(call if_changed_dep,cc_s_c)
-$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
- $(call cmd,offsets,__ASM_OFFSETS_H__)
+$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
+ $(call filechk,offsets,__ASM_OFFSETS_H__)
#####
# 3) Check for missing system calls