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Document and test env vars a bit better #6827

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merged 1 commit into from Apr 3, 2022
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Document and test env vars a bit better #6827

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12 changes: 6 additions & 6 deletions docs/markdown/howtox.md
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Expand Up @@ -12,12 +12,12 @@ When first running Meson, set it in an environment variable.
$ CC=mycc meson <options>
```

Note that environment variables like `CC` only works in native builds.
The `CC` refers to the compiler for the host platform, that is the
compiler used to compile programs that run on the machine we will
eventually install the project on. The compiler used to build things
that run on the machine we do the building can be specified with
`CC_FOR_BUILD`. You can use it in cross builds.
Note that environment variables like `CC` only refer to the host
platform in cross builds. That is, `CC` refers to the compiler used to
compile programs that run on the machine we will eventually install the
project on. The compiler used to build things that run on the machine we
do the building can be specified with `CC_FOR_BUILD`. You can use it in
cross builds.

Note that environment variables are never the idiomatic way to do
anything with Meson, however. It is better to use the native and cross
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6 changes: 2 additions & 4 deletions unittests/linuxliketests.py
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Expand Up @@ -1545,12 +1545,10 @@ def test_identity_cross_env(self):
testdir = os.path.join(self.unit_test_dir, '60 identity cross')
env = {
'CC_FOR_BUILD': '"' + os.path.join(testdir, 'build_wrapper.py') + '"',
'CC': '"' + os.path.join(testdir, 'host_wrapper.py') + '"',
}
crossfile = tempfile.NamedTemporaryFile(mode='w')
crossfile.write(textwrap.dedent('''\
[binaries]
c = ['{}']
'''.format(os.path.join(testdir, 'host_wrapper.py'))))
crossfile.write('')
crossfile.flush()
self.meson_cross_files = [crossfile.name]
# TODO should someday be explicit about build platform only here
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