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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-09-26 13:05:01 +0900 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-10-07 14:26:34 +0000 |
| commit | e19b0fb4851f8b6371d91adb34c68c3566140d3f (patch) | |
| tree | 7bb90148f2ee99b80da8a861223d1dfdca21724b /scripts/Makefile.spl | |
| parent | 1406992f4f21f6d62e3ec0b700da1660519b14c0 (diff) | |
| download | u-boot-e19b0fb4851f8b6371d91adb34c68c3566140d3f.tar.gz | |
kbuild: generate u-boot.cfg as a byproduct of include/autoconf.mk
Our build system still parses ad-hoc CONFIG options in header files
and generates include/autoconf.mk so that Makefiles can reference
them. This gimmick was introduced in the pre-Kconfig days and will
be kept until Kconfig migration is completed.
The include/autoconf.mk is generated like follows:
[1] Preprocess include/common.h with -DDO_DEPS_ONLY and
retrieve macros into include/autoconf.mk.tmp
[2] Reformat include/autoconf.mk.dep into include/autoconf.mk
with tools/scripts/define2mk.sed script
[3] Remove include/autoconf.mk.tmp
Here, include/autoconf.mk.tmp is similar to u-boot.cfg, which is
also generated by preprocessing include/config.h with -DDO_DEPS_ONLY.
In other words, there is much overlap among include/autoconf.mk and
u-boot.cfg build rules.
So, the idea is to split the build rule of include/autoconf.mk
into two stages. The first preprocesses headers into u-boot.cfg.
The second parses the u-boot.cfg into include/autoconf.mk. The
build rules of u-boot.cfg in Makefile and spl/Makefile will be gone.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'scripts/Makefile.spl')
| -rw-r--r-- | scripts/Makefile.spl | 20 |
1 files changed, 1 insertions, 19 deletions
diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl index 4febc6b401..e8cf9f3865 100644 --- a/scripts/Makefile.spl +++ b/scripts/Makefile.spl @@ -156,7 +156,7 @@ spl/boot.bin: $(obj)/u-boot-spl.bin FORCE $(call if_changed,mkimage) endif -ALL-y += $(obj)/$(SPL_BIN).bin $(obj)/$(SPL_BIN).cfg +ALL-y += $(obj)/$(SPL_BIN).bin ifdef CONFIG_SAMSUNG ALL-y += $(obj)/$(BOARD)-spl.bin @@ -216,24 +216,6 @@ quiet_cmd_fdtgrep = FDTGREP $@ $(obj)/$(SPL_BIN).dtb: dts/dt.dtb $(objtree)/tools/fdtgrep FORCE $(call if_changed,fdtgrep) -quiet_cmd_cpp_cfg = CFG $@ -cmd_cpp_cfg = $(CPP) -Wp,-MD,$(depfile) $(cpp_flags) $(LDPPFLAGS) -ansi \ - -DDO_DEPS_ONLY -D__ASSEMBLY__ -x assembler-with-cpp -P -dM -E -o $@ $< - -# If .u-boot.cfg.d is still present, then either: -# a) The previous build used a Makefile that used if_changed rather than -# if_changed_dep when building u-boot.cfg, and hence any later builds will -# be unaware of the dependencies for u-boot.cfg. In this case, we must -# delete u-boot.cfg to force it and .u-boot.cfg.cmd to be rebuilt the -# correct way. -# b) The previous build failed or was interrupted while building u-boot.cfg, -# so deleting u-boot.cfg isn't going to cause any additional work. -ifneq ($(wildcard $(obj)/.$(SPL_BIN).d),) - unused := $(shell rm -f $(obj)/$(SPL_BIN).cfg) -endif -$(obj)/$(SPL_BIN).cfg: include/config.h FORCE - $(call if_changed_dep,cpp_cfg) - pythonpath = PYTHONPATH=tools quiet_cmd_dtocc = DTOC C $@ |