New submission from Eric N. Vander Weele <eri...@gmail.com>:
When specifying CPPFLAGS during `./configure`,
`sysconfig.get_config_var('CPPFLAGS')` does capture the originally specified
flags. However, when building a C/C++ extension, any flags specified via
CPPFLAGS are not present during compilation of extension source files.
Since preprocessor flags (e.g., '-I' rules) may be used during `./configure`
instead of `CFLAGS`, it appears that the `CPPFLAGS` captured should also be
injected when customizing the compiler executable to be invoked.
I have PR that will be submitted and linked shortly.
----------
components: Build, Distutils
messages: 320683
nosy: dstufft, eric.araujo, ericvw
priority: normal
severity: normal
status: open
title: CPPFLAGS during ./configure are not passed-through in
sysconfig.customize_compiler
type: behavior
versions: Python 2.7, Python 3.4, Python 3.5, Python 3.6, Python 3.7, Python 3.8
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue33990>
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