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| author | Wolfgang Denk <wd@denx.de> | 2010-10-26 00:08:35 +0200 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-10-26 21:04:34 +0200 |
| commit | 16a354f920f3959ed847bd917bdfbc7eba48cf1e (patch) | |
| tree | 71272417ffdc5942abadc01d251d5b03a4d99fd2 /Makefile | |
| parent | 553f09823cced77296825f615f00321d932bf914 (diff) | |
| download | u-boot-imx-16a354f920f3959ed847bd917bdfbc7eba48cf1e.zip u-boot-imx-16a354f920f3959ed847bd917bdfbc7eba48cf1e.tar.gz u-boot-imx-16a354f920f3959ed847bd917bdfbc7eba48cf1e.tar.bz2 | |
include/asm-offsets.h: automatically generate assembler constants
A recurrent issue is that certain C level constructs like sizeof() or
offsetof() cannot be used in assembler files, which is inconvenient
when such constructs are used in the definition of macro names etc.
To avoid duplication of such definitions (and thus another cause of
problems), we adapt the Linux way to automatically generate the
respective definitions from the respective C header files.
In Linux, this is implemented in include/linux/kbuild.h, Kbuild, and
arch/*/kernel/asm-offsets.c; we adapt the code from the Linux v2.6.36
kernel tree.
We also copy the concept of the include/generated/ directory which can
be used to hold other automatically generated files as well.
We start with an architecture-independent lib/asm-offsets.c which
generates include/generated/generic-asm-offsets.h (included by
include/asm-offsets.h, which is what will be referred to in the actual
source code). Later this may be extended by architecture-specific
arch/*/lib/asm-offsets.c files that will generate a
include/generated/asm-offsets.h.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 21 |
1 files changed, 19 insertions, 2 deletions
@@ -372,7 +372,8 @@ GEN_UBOOT = \ cd $(LNDIR) && $(LD) $(LDFLAGS) $$UNDEF_SYM $(__OBJS) \ --start-group $(__LIBS) --end-group $(PLATFORM_LIBS) \ -Map u-boot.map -o u-boot -$(obj)u-boot: depend $(SUBDIRS) $(OBJS) $(LIBBOARD) $(LIBS) $(LDSCRIPT) $(obj)u-boot.lds +$(obj)u-boot: depend \ + $(SUBDIRS) $(OBJS) $(LIBBOARD) $(LIBS) $(LDSCRIPT) $(obj)u-boot.lds $(GEN_UBOOT) ifeq ($(CONFIG_KALLSYMS),y) smap=`$(call SYSTEM_MAP,u-boot) | \ @@ -426,7 +427,9 @@ updater: # Explicitly make _depend in subdirs containing multiple targets to prevent # parallel sub-makes creating .depend files simultaneously. -depend dep: $(TIMESTAMP_FILE) $(VERSION_FILE) $(obj)include/autoconf.mk +depend dep: $(TIMESTAMP_FILE) $(VERSION_FILE) \ + $(obj)include/autoconf.mk \ + $(obj)include/generated/generic-asm-offsets.h for dir in $(SUBDIRS) $(CPUDIR) $(dir $(LDSCRIPT)) ; do \ $(MAKE) -C $$dir _depend ; done @@ -473,6 +476,18 @@ $(obj)include/autoconf.mk: $(obj)include/config.h sed -n -f tools/scripts/define2mk.sed > $@.tmp && \ mv $@.tmp $@ +$(obj)include/generated/generic-asm-offsets.h: $(obj)include/autoconf.mk.dep \ + $(obj)lib/asm-offsets.s + @$(XECHO) Generating $@ + tools/scripts/make-asm-offsets $(obj)lib/asm-offsets.s $@ + +$(obj)lib/asm-offsets.s: $(obj)include/autoconf.mk.dep \ + $(src)lib/asm-offsets.c + @mkdir -p $(obj)lib + $(CC) -DDO_DEPS_ONLY \ + $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \ + -o $@ $(src)lib/asm-offsets.c -c -S + ######################################################################### else # !config.mk all $(obj)u-boot.hex $(obj)u-boot.srec $(obj)u-boot.bin \ @@ -1206,6 +1221,7 @@ clean: $(obj)u-boot.lds \ $(obj)arch/blackfin/cpu/bootrom-asm-offsets.[chs] @rm -f $(obj)include/bmp_logo.h + @rm -f $(obj)lib/asm-offsets.s @rm -f $(obj)nand_spl/{u-boot.lds,u-boot-spl,u-boot-spl.map,System.map} @rm -f $(obj)onenand_ipl/onenand-{ipl,ipl.bin,ipl.map} @rm -f $(ONENAND_BIN) @@ -1229,6 +1245,7 @@ clobber: clean @rm -f $(obj)tools/{env/crc32.c,inca-swap-bytes} @rm -f $(obj)arch/powerpc/cpu/mpc824x/bedbug_603e.c @rm -f $(obj)include/asm/proc $(obj)include/asm/arch $(obj)include/asm + @rm -fr $(obj)include/generated @[ ! -d $(obj)nand_spl ] || find $(obj)nand_spl -name "*" -type l -print | xargs rm -f @[ ! -d $(obj)onenand_ipl ] || find $(obj)onenand_ipl -name "*" -type l -print | xargs rm -f |