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build: add xargs as prerequisite 

Build system needs an 'xargs' that supports '-r' which darwin doesn't.
Homebrew installs a 'gxargs' with the findutils package so look for
'gxargs' as well as 'xargs'

This is a bit of a 'fun' corner case anyway. xargs is only required by
the build if 'CONFIG_AUTOREMOVE' is set and after the build system has
built 'tools/findutils' we have a fully working xargs for host anyway.
Until that time we have to rely on the host's xargs implementation.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
This commit is contained in:
Kevin Darbyshire-Bryant 2020-02-29 15:28:44 +00:00
parent 1c880f2324
commit 4d87963381
1 changed files with 5 additions and 0 deletions
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5
include/prereq-build.mk
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@ -93,6 +93,11 @@ $(eval $(call SetupHostCommand,find,Please install GNU 'find', \
$(eval $(call SetupHostCommand,bash,Please install GNU 'bash', \
bash --version 2>&1 | grep GNU))
$(eval $(call SetupHostCommand,xargs, \
Please install 'xargs' that supports '-r/--no-run-if-empty', \
gxargs -r --version, \
xargs -r --version))
$(eval $(call SetupHostCommand,patch,Please install GNU 'patch', \
gpatch --version 2>&1 | grep 'Free Software Foundation', \
patch --version 2>&1 | grep 'Free Software Foundation'))