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479c987464
In Python 3.4+, upstream added and switched to using a shell
implementation of the python-config script [1]. The Python
implementation (python-config.py) remained used by all versions < 3.4.
While the shell implementation returns the path to the Python
shared library when using the --ldflags script argument, the Python
implementation of the script does not. The bug has been reported, but
has not yet been merged [2].
The Python ports currently default to including ${LOCALBASE}/lib
in LIBS when the NLS option is enabled (which it is by default).
When built *with* NLS (gettext) support, the flags added to LIBS
are returned in `pythonX.Y-config --ldflags` output, which happens
to match the path to the Python shared library.
If the NLS option is disabled, ${LOCALBASE}/lib is not added to LIBS,
and are therefore not returned in --ldflags output.
This results in potential linking errors for software that uses
python-config to obtain the correct library path, when the NLS option is
disabled:
$ make WITH=PYTHON -C audio/alsa-lib
[...]
--- smixer-python.la ---
CCLD smixer-python.la
/usr/bin/ld: cannot find -lpython2.7
This change modifies the python-config.in script to match the shell
implementation, outputting the library path in --ldflags output.
While I'm here:
for Python 3.2 and Python 3.3 ports, backport a library order
change [3]. This could affect linking with static libraries.
Use standard length lines and reduce diffs in pkg-message
[1] https://bugs.python.org/issue16235
[2] https://bugs.python.org/issue7352
[2] https://bugs.python.org/issue18096
PR: 197757
Submitted by: jbeich
MFH: 2015Q4
22 lines
776 B
Plaintext
22 lines
776 B
Plaintext
# pythonx.y-config --ldflags out of /usr and missing -L<install_lib_dir>
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# https://bugs.python.org/issue7352
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--- Misc/python-config.in.orig 2015-10-18 07:24:01 UTC
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+++ Misc/python-config.in
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@@ -21,6 +21,7 @@ except getopt.error:
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if not opts:
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exit_with_usage()
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+libdir = sysconfig.EXEC_PREFIX + '/lib'
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pyver = sysconfig.get_config_var('VERSION')
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getvar = sysconfig.get_config_var
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@@ -50,6 +51,7 @@ for opt in opt_flags:
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# add the prefix/lib/pythonX.Y/config dir, but only if there is no
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# shared library in prefix/lib/.
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if opt == '--ldflags':
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+ libs.insert(0, '-L' + libdir)
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if not getvar('Py_ENABLE_SHARED'):
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libs.insert(0, '-L' + getvar('LIBPL'))
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if not getvar('PYTHONFRAMEWORK'):
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