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include/prereq-build.mk: macOS cross build improvements

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This updates prereq-build.mk to find a suitable realpath utility, and
adds another place to look for a suitable getopt utility.

realpath has been used most notably by scripts/ipkg-build since
commit bb95be9265 ("scripts,ipkg-build: use realpath for pkg_dir")
and there are assorted other uses of it during a build.
It is ordinarily provided by GNU coreutils. This adds a SetupHostCommand
to locate it either under its own name or under grealpath, the name that
it will be available as under MacPorts or Homebrew, which use
--program-prefix=g.

Similarly, update the SetupHostCommand for getopt to be able to locate a
util-linux getopt at the default path used by MacPorts, in the same
fashion that
commit cc16f5d73e ("build: try to find getopt in macOS homebrew's standard location")'
did for Homebrew. As there is no standard alternative --program-prefix
for util-linux utilities in the way that GNU packages often use a "g"
prefix, this path-based approach is required in case a non-util-linux
getopt (such as one provided by an OS) shadows the util-linux getopt
in the PATH.

Signed-off-by: Mark Mentovai <mark@moxienet.com>
This commit is contained in:
Mark Mentovai 2022-06-09 11:00:58 -04:00 committed by Christian Lamparter
parent ed4d743a2c
commit f614332197
1 changed files with 6 additions and 1 deletions
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7
include/prereq-build.mk
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@ -130,7 +130,12 @@ $(eval $(call SetupHostCommand,getopt, \
Please install an extended getopt version that supports --long, \
gnugetopt -o t --long test -- --test | grep '^ *--test *--', \
getopt -o t --long test -- --test | grep '^ *--test *--', \
/usr/local/opt/gnu-getopt/bin/getopt -o t --long test -- --test | grep '^ *--test *--'))
/usr/local/opt/gnu-getopt/bin/getopt -o t --long test -- --test | grep '^ *--test *--', \
/opt/local/bin/getopt -o t --long test -- --test | grep '^ *--test *--'))
$(eval $(call SetupHostCommand,realpath,Please install a 'realpath' utility, \
grealpath /, \
realpath /))
$(eval $(call SetupHostCommand,stat,Cannot find a file stat utility, \
gnustat -c%s $(TOPDIR)/Makefile, \