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build: add busybox support to time prereq-check

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Busybox time supports the GNU time '-f' syntax used by the build time
logging implemented in ff6e62b288, however the prerequisite check added
only works with GNU time installed as `time` or `gtime`.

As busybox is a multicall binary, the name of the symlink setup by
SetupHostCommand also must be changed from `gtime` to `time` to fix the
value of argv[0]. This causes a number of shells (including bash) to use
their builtin impelementation of time, so the sole invocation has been
changed to use `env time` to use the value found on the $PATH.

Signed-off-by: Andy Boyett <agb@agb.io>
This commit is contained in:
Andy Boyett
2018-05-16 22:09:57 -07:00
committed by John Crispin
parent b1a173d7c3
commit 591780615b
2 changed files with 4 additions and 3 deletions
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5
include/prereq-build.mk
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@@ -138,9 +138,10 @@ $(eval $(call SetupHostCommand,bzip2,Please install 'bzip2', \
$(eval $(call SetupHostCommand,wget,Please install GNU 'wget', \
wget --version | grep GNU))
$(eval $(call SetupHostCommand,gtime,Please install GNU 'time', \
$(eval $(call SetupHostCommand,time,Please install GNU 'time' or BusyBox 'time', \
gtime --version 2>&1 | grep GNU, \
time --version 2>&1 | grep GNU))
time --version 2>&1 | grep GNU, \
busybox time 2>&1 | grep BusyBox))
$(eval $(call SetupHostCommand,perl,Please install Perl 5.x, \
perl --version | grep "perl.*v5"))