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bpo-38472: setup.py uses LC_ALL=C to check the C compiler (GH-30929)

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Fix GCC detection in setup.py when cross-compiling. The C compiler is
now run with LC_ALL=C. Previously, the detection failed with a German
locale.
(cherry picked from commit a9503ac394)

Co-authored-by: Victor Stinner <vstinner@python.org>
This commit is contained in:
Miss Islington (bot) 2022-01-26 15:50:30 -08:00 • committed by GitHub
parent 49971b2d18
commit ff11effab7
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2 changed files with 5 additions and 1 deletions
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Misc/NEWS.d/next/Build/2022-01-26-22-59-12.bpo-38472.RxfLho.rst Normal file
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@ -0,0 +1,2 @@
Fix GCC detection in setup.py when cross-compiling. The C compiler is now
run with LC_ALL=C. Previously, the detection failed with a German locale.

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setup.py
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@ -682,7 +682,9 @@ class PyBuildExt(build_ext):
tmpfile = os.path.join(self.build_temp, 'ccpaths')
if not os.path.exists(self.build_temp):
os.makedirs(self.build_temp)
ret = run_command('%s -E -v - </dev/null 2>%s 1>/dev/null' % (CC, tmpfile))
# bpo-38472: With a German locale, GCC returns "gcc-Version 9.1.0
# (GCC)", whereas it returns "gcc version 9.1.0" with the C locale.
ret = run_command('LC_ALL=C %s -E -v - </dev/null 2>%s 1>/dev/null' % (CC, tmpfile))
is_gcc = False
is_clang = False
in_incdirs = False