STINNER Victor <[email protected]> added the comment:
My understanding of Fedora 00001-rpath.patch is that it ignores -rpath PATH
option passed to the setup.py bdist command if PATH is equal to Python
sysconfig LIBDIR variable. So it impacts how third party C extensions are
built. On my Fedora, LIBDIR is set to:
$ python3 -c "import sysconfig; print(sysconfig.get_config_var('LIBDIR'))"
/usr/lib64
Only LIBDIR directory is ignored: other -rpath directories are passed to the
linker.
---
UnixCCompiler.link() has a runtime_library_dirs parameter which can be modified
by the _fix_lib_args() method and then is passed to gen_lib_options().
gen_lib_options() calls compiler.runtime_library_dir_option() on each directory
of runtime_library_dirs: this part is responsible to use the proper linker
option: -R, -rpath, -L, etc.
build_ext.build_extension() method of distutils.commands.build_ext pass
Extension.runtime_library_dirs to compiler.link_shared_object()
build_ext.check_extensions_list() modify the runtime_library_dirs attribute:
# Medium-easy stuff: same syntax/semantics, different names.
ext.runtime_library_dirs = build_info.get('rpath')
I understand that build_info.get('rpath') comes from -rpath command line option
of setup.py bdist_ext command:
('rpath=', 'R',
"directories to search for shared C libraries at runtime"),
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Python tracker <[email protected]>
<https://bugs.python.org/issue36659>
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