Re: [RFC] python-config.py --ldflags should return relocated path to libpython

[Jan Kratochvil <jan dot kratochvil at redhat dot com>]

On Fri, 09 Jul 2010 00:24:45 +0200, Joel Brobecker wrote:
> --- a/gdb/python/python-config.py
> +++ b/gdb/python/python-config.py
> @@ -50,8 +50,21 @@ for opt in opt_flags:
>          # add the prefix/lib/pythonX.Y/config dir, but only if there is no
>          # shared library in prefix/lib/.
>          if opt == '--ldflags':
> +            # Provide the location where the Python library is installed.
> +            # We always provide it, because Python may have been installed
> +            # at a non-standard location.
>              if not getvar('Py_ENABLE_SHARED'):
> -                libs.insert(0, '-L' + getvar('LIBPL'))
> +                # There is no shared library in prefix/lib.  The static
> +                # library is in prefix/lib/pythonX.Y/config.
> +                #
> +                # Note that we cannot use getvar('LIBPL') like we used to,
> +                # because it provides the location at build time, which might
> +                # be different from the actual location at runtime.
> +                libdir = sysconfig.get_python_lib(standard_lib=True) + '/config'
> +            else:
> +                # The Python shared library is installed in prefix/lib.
> +                libdir = sysconfig.PREFIX + '/lib'

On Fedora 14snapshot x86_64 it generates the following warnings:

/usr/bin/ld: skipping incompatible /usr/lib/libtinfo.so when searching for -ltinfo
/usr/bin/ld: skipping incompatible /usr/lib/libz.so when searching for -lz
/usr/bin/ld: skipping incompatible /usr/lib/libm.so when searching for -lm
/usr/bin/ld: skipping incompatible /usr/lib/libm.a when searching for -lm
/usr/bin/ld: skipping incompatible /usr/lib/libpthread.so when searching for -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/libpthread.a when searching for -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/libdl.so when searching for -ldl
/usr/bin/ld: skipping incompatible /usr/lib/libdl.a when searching for -ldl
/usr/bin/ld: skipping incompatible /usr/lib/libutil.so when searching for -lutil
/usr/bin/ld: skipping incompatible /usr/lib/libutil.a when searching for -lutil
/usr/bin/ld: skipping incompatible /usr/lib/libm.so when searching for -lm
/usr/bin/ld: skipping incompatible /usr/lib/libm.a when searching for -lm
/usr/bin/ld: skipping incompatible /usr/lib/libpython2.7.so when searching for -lpython2.7
/usr/bin/ld: skipping incompatible /usr/lib/libexpat.so when searching for -lexpat
/usr/bin/ld: skipping incompatible /usr/lib/libdl.so when searching for -ldl
/usr/bin/ld: skipping incompatible /usr/lib/libdl.a when searching for -ldl
/usr/bin/ld: skipping incompatible /usr/lib/libc.so when searching for -lc
/usr/bin/ld: skipping incompatible /usr/lib/libc.a when searching for -lc
/usr/bin/ld: skipping incompatible /usr/lib/libtinfo.so when searching for -ltinfo
/usr/bin/ld: skipping incompatible /usr/lib/libz.so when searching for -lz
/usr/bin/ld: skipping incompatible /usr/lib/libm.so when searching for -lm
/usr/bin/ld: skipping incompatible /usr/lib/libm.a when searching for -lm
/usr/bin/ld: skipping incompatible /usr/lib/libpthread.so when searching for -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/libpthread.a when searching for -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/libdl.so when searching for -ldl
/usr/bin/ld: skipping incompatible /usr/lib/libdl.a when searching for -ldl
/usr/bin/ld: skipping incompatible /usr/lib/libutil.so when searching for -lutil
/usr/bin/ld: skipping incompatible /usr/lib/libutil.a when searching for -lutil
/usr/bin/ld: skipping incompatible /usr/lib/libm.so when searching for -lm
/usr/bin/ld: skipping incompatible /usr/lib/libm.a when searching for -lm
/usr/bin/ld: skipping incompatible /usr/lib/libpython2.7.so when searching for -lpython2.7
/usr/bin/ld: skipping incompatible /usr/lib/libexpat.so when searching for -lexpat
/usr/bin/ld: skipping incompatible /usr/lib/libdl.so when searching for -ldl
/usr/bin/ld: skipping incompatible /usr/lib/libdl.a when searching for -ldl
/usr/bin/ld: skipping incompatible /usr/lib/libc.so when searching for -lc
/usr/bin/ld: skipping incompatible /usr/lib/libc.a when searching for -lc

Sure it still links correctly.  But I somehow find incorrect to supply
inappropriate libraries into the -L path, such as for occasional buggy linker
script contained in the .so files missing proper OUTPUT_FORMAT protection etc.

I do not mind much, though, correct system should copy with it.


Regards,
Jan