[New-bugs-announce] [issue38472] GCC detection in setup.py is broken

[Alex Grund]

New submission from Alex Grund <flamefire89 at gmail.com>:

`setup.py` runs `<CC> -E -v - </dev/null 1>/dev/null` to figure out include and library paths from the compiler in the function `add_gcc_paths`.

However sample output from the compiler is:

Es werden eingebaute Spezifikationen verwendet.
COLLECT_GCC=g++
Ziel: x86_64-pc-linux-gnu
Konfiguriert mit: ../configure --enable-languages=c,c++,fortran --enable-lto --enable-checking=release --disable-multilib --enable-shared=yes --enable-static=yes --enable-threads=posix --enable-plugins --enable-gold=default --enable-ld --with-plugin-ld=ld.gold --prefix=/sw/installed/GCCcore/9.1.0 --with-local-prefix=/sw/installed/GCCcore/9.1.0 --enable-bootstrap --with-isl=/dev/shm/easybuild-build/GCCcore/9.1.0/dummy-/gcc-9.1.0/stage2_stuff
Thread-Modell: posix
gcc-Version 9.1.0 (GCC) 
COLLECT_GCC_OPTIONS='-E' '-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /software/haswell/GCCcore/9.1.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/9.1.0/cc1 -E -quiet -v -iprefix /software/haswell/GCCcore/9.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/9.1.0/ - -mtune=generic -march=x86-64
nicht vorhandenes Verzeichnis »/software/haswell/GCCcore/9.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/9.1.0/../../../../x86_64-pc-linux-gnu/include« wird ignoriert
doppeltes Verzeichnis »/software/haswell/GCCcore/9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/9.1.0/include« wird ignoriert
doppeltes Verzeichnis »/software/haswell/GCCcore/9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/9.1.0/include-fixed« wird ignoriert
nicht vorhandenes Verzeichnis »/software/haswell/GCCcore/9.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/9.1.0/../../../../x86_64-pc-linux-gnu/include« wird ignoriert
doppeltes Verzeichnis »/sw/installed/GCCcore/9.1.0/include« wird ignoriert
  da es ein Nicht-Systemverzeichnis ist, das ein Systemverzeichnis dupliziert
Suche für »#include "..."« beginnt hier:
Suche für »#include <...>« beginnt hier:
 /sw/installed/binutils/2.32-GCCcore-9.1.0/include
 /sw/installed/zlib/1.2.11-GCCcore-9.1.0/include
 /software/haswell/GCCcore/9.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/9.1.0/include
 /software/haswell/GCCcore/9.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/9.1.0/include-fixed
 /sw/installed/GCCcore/9.1.0/include
 /usr/include
Ende der Suchliste.
COMPILER_PATH=/software/haswell/GCCcore/9.1.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/9.1.0/:/software/haswell/GCCcore/9.1.0/bin/../libexec/gcc/
LIBRARY_PATH=/software/haswell/GCCcore/9.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/9.1.0/:/software/haswell/GCCcore/9.1.0/bin/../lib/gcc/:/sw/installed/GCCcore/9.1.0/lib64/../lib64/:/sw/installed/GCCcore/9.1.0/lib/../lib64/:/software/haswell/GCCcore/9.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/9.1.0/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/sw/installed/binutils/2.32-GCCcore-9.1.0/lib/:/sw/installed/zlib/1.2.11-GCCcore-9.1.0/lib/:/sw/installed/GCCcore/9.1.0/lib64/:/sw/installed/GCCcore/9.1.0/lib/:/software/haswell/GCCcore/9.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/9.1.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-E' '-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'


So the correct matcher would be "gcc-Version", maybe in addition to "gcc version"

Due to this the setup fails to build e.g. bzip2 modules as the include and lib paths are passed in via CPATH and LIBRARY_PATH only (module system on HPC system)

----------
components: Build
messages: 354629
nosy: Alex Grund
priority: normal
severity: normal
status: open
title: GCC detection in setup.py is broken
type: compile error
versions: Python 2.7, Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38472>
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