Change in ...coreboot[master]: Makefile.inc: Avoid race condition when using 'make -j<N>'

[Jonathan Neuschäfer (Code Review)]

Hello build bot (Jenkins), Patrick Georgi, Martin Roth,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/29984

to look at the new patch set (#2).

Change subject: Makefile.inc: Avoid race condition when using 'make -j<N>'
......................................................................

Makefile.inc: Avoid race condition when using 'make -j<N>'

When building coreboot from scratch with 'make -j4', I sometimes see
this error:

CREATE     build/mainboard/emulation/qemu-riscv/cbfs-file.wblRgZ.out (from /.../coreboot/.config)
    HOSTCC     cbfstool/cbfstool (link)
make[1]: execvp: build/util/kconfig/conf: Permission denied
make[1]: *** [/.../coreboot/util/kconfig/Makefile:92: savedefconfig] Error 127

It happens, I think, because the rule generated by
cbfs-files-processor-defconfig runs 'make savedefconfig', which builds
build/util/kconfig/conf, and something also builds it, at the same time.
Fix this case, by making this rule depend on $(objutil)/kconfig/conf.

The same fix is also precautiously applied to the rule for
$(KCONFIG_AUTOHEADER) in Makefile.

Change-Id: Ie93eda567f88ca08c97df7e70cdff5b07442747d
Signed-off-by: Jonathan Neuschäfer 
---
M Makefile
M Makefile.inc
2 files changed, 2 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/84/29984/2