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Full Discussion: Remove Unwanted Libraries - optimizing
Homework and Emergencies Emergency UNIX and Linux Support Remove Unwanted Libraries - optimizing Post 302393525 by Andre_Merzky on Tuesday 9th of February 2010 04:07:43 AM
Old 02-09-2010
Quote:
Originally Posted by uunniixx
This is what I want to avoid - hit and trial method, the problem will get worse when inclusion of one object / static library file I have another dependency. Further this will take lots of workload and days to drive it to completion
I don't think that trial/error would be so tough. In pseudo perl code:

Code:
my @all_libs  = split (/\s+/, `ls $LIBPATH/*.a`);
my $good_libs = "";

# get number of unresolved messages w/o any static lib:
my $n_symbols = `make target | grep 'unresolved' | wc -l`;
chomp ($n_symbols);

foreach my $lib ( @all_libs )
{
  # try to add that static lib, and see if the number of unresolved syms decreases

  $lib =~ s/^lib//;
  $lib =~ s/\.a$//;
  
  my $check = `/bin/env LDFLAGS=-l$lib make target | grep 'unresolved' | wc -l`;
  chomp ($check);

  if ( $check < $n_symbols )
  {
     # good lib, well done!
     $good_libs .= " -l$lib");
  }    
}

# we want to link against all good libs
print "$good_libs\n";

You may getting symbols resolved twice - but that is a situation you should have stumbled over previously, so I guess thats unlikely. In any case, that will be simplier then the more formal, and elegant Smilie, way via nm, which was proposed earlier.

The above won't work if some of your static libs depend on other static libs - in that case, you need to add those 'good' libs you found to the test linking step.
Last edited by Andre_Merzky; 02-09-2010 at 05:14 AM.. Reason: simplified code
 

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LEARN ABOUT SUSE

xine-config

XINE(1) 						      General Commands Manual							   XINE(1)

NAME

       xine-config - script to get information about the installed version of libxine

SYNOPSIS

       xine-config  [--prefix[=DIR]]  [--exec-prefix[=DIR]]  [--version] [--libs] [--cflags] [--objcflags] [--plugindir] [--datadir] [--scriptdir]
       [--localedir]

DESCRIPTION

       xine-config is a tool that is used to determine the compiler and linker flags that should be used to compile and  link  programs  that  use
       libxine.  It  can also be used to determine the directories where libxine expects plugins and skins.  Finally, it's also used internally by
       the .m4 macros for GNU autoconf that are included with xine-lib.

OPTIONS

       xine-config accepts the following options:

       --version
	       Print the currently installed version of libxine on the standard output.

       --libs  Print the linker flags that are necessary to link libxine to a program.

       --cflags
       --objcflags
	       Print the compiler flags (for C and Objective C, respectively) that are necessary to compile a program that uses libxine.

       --bindir
       --plugindir
       --datadir
       --scriptdir
       --localedir
	       Print the directory where, respectively, libxine binaries, plugins, data files, scripts and locale data are stored/expected.

       --prefix=PREFIX
	       If specified, use PREFIX instead of the installation prefix that xine-lib was built with when computing the output for the --cflags
	       and  --libs options. This option is also used for the exec prefix if --exec-prefix was not specified. This option must be specified
	       before any --libs or --cflags options.

       --exec-prefix=PREFIX
	       If specified, use PREFIX instead of the installation exec prefix that xine-lib was built with when computing  the  output  for  the
	       --cflags and --libs options.  This option must be specified before any --libs or --cflags options.

SEE ALSO

       xine-lib(3), xine(1)

COPYRIGHT

       Copyright (C) 2001 Siggi Langauf, (C) 2001-2008 the xine project.  Based on the man page for gtk-config, (C) 1998 Owen Taylor.

       Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, pro-
       vided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice  appear  in  sup-
       porting documentation.

The xine project						    2001-08-28								   XINE(1)
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