distutils cannot link C++ code with GCC

[barry-scott]

BPO	454030
Nosy	@mwhudson, @gvanrossum, @barry-scott

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2002-11-05.17:04:39.000>
created_at = <Date 2001-08-21.23:42:24.000>
labels = ['library']
title = 'distutils cannot link C++ code with GCC'
updated_at = <Date 2002-11-05.17:04:39.000>
user = 'https://github.com/barry-scott'

bugs.python.org fields:

activity = <Date 2002-11-05.17:04:39.000>
actor = 'niemeyer'
assignee = 'none'
closed = True
closed_date = None
closer = None
components = ['Distutils']
creation = <Date 2001-08-21.23:42:24.000>
creator = 'barry-scott'
dependencies = []
files = []
hgrepos = []
issue_num = 454030
keywords = []
message_count = 6.0
messages = ['6124', '6125', '6126', '6127', '6128', '6129']
nosy_count = 5.0
nosy_names = ['mwh', 'gvanrossum', 'nnorwitz', 'barry-scott', 'niemeyer']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue454030'
versions = []

[barry-scott]

It is mandatory to link C++ code against -lstdc++ -lm
when creating an extension.

distutils does not do this in 2.1.1

Here is a setup.py for Python CXX that works around
the problem, but it would be better for distutils to
understand enough about C++ to do the right thing.
THen the code for other compilers could be added. But
GCC is important enough to do first.

You can get the CXX sources from
http://sourceforge.net/projects/cxx/

from distutils.core import setup, Extension

if os.name == 'posix':
	CXX_libraries = ['stdc++','m']
else:
	CXX_libraries = []


setup(name="pycxx_demo", version="1.0",
	ext_modules=
		[Extension(
			"example",
			sources = [
				"Demo/example.cxx",
				"Demo/python.cxx",
				"Demo/range.cxx",
				"Demo/rangetest.cxx",
			
	"Src/cxx_extensions.cxx",
				"Src/cxxextensions.c",
				"Src/cxxsupport.cxx",
			
	"Src/IndirectPythonInterface.cxx" ],
			include_dirs = [ ".", "Demo" ],
			libraries = CXX_libraries
			)
		]
	)

[gvanrossum]

Logged In: YES
user_id=6380

Nobody at PL understands distutils well enough to do this,
so lowering the priority -- there's no way this will hold up
the release.

[mwhudson]

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user_id=6656

Is this the same problem as

[ bpo-413582 ] g++ must be called for c++ extensions

? Not a rhetorical question, I would like to know!

[barry-scott]

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user_id=28665

Yes using G++ is another way to solve this.

[nnorwitz]

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user_id=33168

Barry, is this still a problem w/2.2.2?

[niemeyer]

Logged In: YES
user_id=7887

Fixed in bug bpo-413582.