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meson: Print custom message when GNU grep is not installed

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Currently, if GNU grep is not installed on a FreeBSD system the
configuration step will fail with

  Program grep found: YES (/usr/bin/grep)
  Program /usr/local/bin/grep found: NO

  ERROR: Program '/usr/local/bin/grep' not found

which is confusing and not very useful; after this change, the
message will be

  Program grep found: YES (/usr/bin/grep)
  Program /usr/local/bin/grep found: NO

  ERROR: Problem encountered: GNU grep not found

instead, which should do a better job helping the user figure
out that they need to install GNU grep from ports to proceed.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This commit is contained in:
Andrea Bolognani 2021-03-24 09:45:29 +01:00
parent 8e2b814ead
commit 6a023e943e
1 changed files with 4 additions and 1 deletions
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5
build-aux/meson.build
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@ -18,7 +18,10 @@ if host_machine.system() == 'freebsd'
grep_cmd = run_command(grep_prog, '--version')
if grep_cmd.stdout().startswith('grep (BSD grep')
grep_prog = find_program('/usr/local/bin/grep')
grep_prog = find_program('/usr/local/bin/grep', required: false)
if not grep_prog.found()
error('GNU grep not found')
endif
grep_cmd = run_command(grep_prog, '--version')
if grep_cmd.stdout().startswith('grep (BSD grep')
error('GNU grep not found')