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| H A D | subdir.mk | cba8ca1c37cbc93ec5d624c3ab7bafbe91a8f187 Fri Sep 13 16:01:48 UTC 2019 Jerome Forissier <jerome@forissier.org> build: prevent produce-* from being forced built before current submodule
Problem:
$ make -s out/arm-plat-vexpress/core/mm/fobj.o
$ rm out/arm-plat-vexpress/ldelf/ldelf.elf
$ rm out/arm-plat-vexpress/core/mm/fobj.o
$ make out/arm-plat-vexpress/core/mm/fobj.o
CHK out/arm-plat-vexpress/conf.mk
CHK out/arm-plat-vexpress/include/generated/conf.h
LD out/arm-plat-vexpress/ldelf/ldelf.elf
GEN out/arm-plat-vexpress/core/ldelf_hex.c
CC out/arm-plat-vexpress/core/mm/fobj.o
Why would fobj.o depend on ldelf.elf and ldelf_hex.c? Answer is: it
shouldn't. This behavior is caused by FORCE-GENSRC$(sm) depending on
all the produce-<something> targets. In fact, such a dependency is
rarely needed. It makes sense for include files for instance; but
certainly not for C source files which are pulled in the build by other
means.
This patch introduces force-gensrc-<something> to prevent the generated
file $(produce-<something>) from being added to FORCE-GENSRC$(sm)
unless $(force-gensrcs-<something>) is "y". The test case above works
as expected:
$ make -s out/arm-plat-vexpress/core/mm/fobj.o
$ rm out/arm-plat-vexpress/ldelf/ldelf.elf
$ rm out/arm-plat-vexpress/core/mm/fobj.o
$ make out/arm-plat-vexpress/core/mm/fobj.o
CHK out/arm-plat-vexpress/conf.mk
CHK out/arm-plat-vexpress/include/generated/conf.h
CC out/arm-plat-vexpress/core/mm/fobj.o
Signed-off-by: Jerome Forissier <jerome@forissier.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
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