Re: Libtool does not scale well.

[Robert Boehne]

Jan:

Run later versions of libtool where this problem has been fixed
somewhat.
KDE requires some libraries to be specified more than once, but not
1,372 times. ;)

Robert


"Jan D." wrote:
> 
> Hello.
> 
> Running
> ltconfig (GNU libtool) 1.3.5 (1.385.2.206 2000/05/27 11:12:27)
> 
> on GNU/Linux.  While trying to compile and link KDE 2.2.2, I came to
> kdebindings-2.2.2, that seems to depend on a lot of .la-files.  In
> directory kdebindings-2.2.2/kdejava/koala, the link command was(lines
> have been split):
> 
> /bin/sh ../../libtool --mode=link --tag=CXX g++  -O2 -O3 -pipe
> -fno-exceptions -fno-check-new   -o koala -L/usr/X11R6/lib
> -L/opt/qt-2.3.1/lib -L/opt/kde-2.2/lib
> -L../../qtjava/javalib/qtjava -R /opt/kde-2.2/lib -R /opt/qt-2.3.1/lib
> -R /usr/X11R6/lib main.o ./kdejava/libkdejava.la -lkjs -lmimelib
> -lqtjava -lkhtml -lkssl -lkparts -lkmid  -lkab -lkspell -lkfile -lm
> -lkab -lkspell -lkfile -lkdeui -lkdecore -lqt -lXext -lX11 -lresolv
> 
> On this libtool processed and processed for a very long time (about 30
> minutes) until it produced a commandline that was 33564 characters long.
>   This was too much for the linker.
> 
> On this command line where:
> 1718 entries of -lm
> 1026 entries of -lc
> 1715 entries of -lgcc
> 1372 entries of -lgcc_s.
> 
> The last 3 (-lc, -lgcc, -lgcc_s) is not even needed on the command line
> as g++ adds them automatically.
> 
> I think libtool needs some filtering function to remove redundant
> librariers from .la-files (or even not put in them there in the first
> place).  Also, -lc -lgcc and -lgcc_s should not be mentioned at all I think.
> 
>         Jan D.
> 
> PS. I made a script to trim libraries from .la-files, so I solved the
> immediate problem.  But I see this as a growing problem as more and more
> libraries are used. I think gnumeric uses more than 60 for instance.
> DS.
> 
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-- 
Robert Boehne             Software Engineer
Ricardo Software   Chicago Technical Center
TEL: (630)789-0003 x. 238
FAX: (630)789-0127
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