8000 MinGW support by isuruf · Pull Request #36 · pybind/python_example · GitHub
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MinGW support #36

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MinGW support #36

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7aeb9cc
Check C++11 flags in mingw32 compiler
isuruf Sep 19, 2018
f3e61bf
Fix for temp file on windows
isuruf Sep 19, 2018
6be7a0c
Fix removing directories
isuruf Feb 20, 2019
889c3b8
Revert "Fix removing directories"
isuruf Feb 20, 2019
5264c61
Remove file
isuruf Feb 20, 2019
1983e70
Merge branch 'master' into mingw
isuruf Apr 9, 2020
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16 changes: 11 additions & 5 deletions setup.py
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Original file line number Diff line number Diff line change
Expand Up @@ -41,13 +41,19 @@ def has_flag(compiler, flagname):
"""Return a boolean indicating whether a flag name is supported on
the specified compiler.
"""
import tempfile
with tempfile.NamedTemporaryFile('w', suffix='.cpp') as f:
import tempfile, os
with tempfile.NamedTemporaryFile('w', suffix='.cpp', delete=False) as f:
f.write('int main (int argc, char **argv) { return 0; }')
fname = f.name
try:
compiler.compile([fname], extra_postargs=[flagname])
except setuptools.distutils.errors.CompileError:
return False
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What is the reason for not deleting the temporary file and moving this out of the context manager?

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On windows the temp file cannot be opened a second time while
it is still opened by python. Close the file in python before
asking the compiler to read it.

See https://docs.python.org/3.7/library/tempfile.html#tempfile.NamedTemporaryFile

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Ok it makes sense.

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But in this case, the file should be deleted later.

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How about something like below, so that I don't have to worry about cleaning up stuff?

    import tempfile, os
    with tempfile.TemporaryDirectory() as d:
        fname = os.path.join(d, 'main.cpp')
        with open(fname, 'w') as f:
            f.write('int main (int argc, char **argv) { return 0; }')
        try:
            compiler.compile([fname], extra_postargs=[flagname])
        except setuptools.distutils.errors.CompileError:
            return False
    return True

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TemporaryDirectory is not in py 2.7. Reverting to deleting the file

finally:
try:
compiler.compile([f.name], extra_postargs=[flagname])
except setuptools.distutils.errors.CompileError:
return False
os.remove(fname)
except OSError:
pass
return True


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