Re: Documentation/devel/

[Reinhold Kainhofer]

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Am Samstag, 10. Januar 2009 19:32:23 schrieb John Mandereau:
> Reinhold Kainhofer a écrit :
> > Am Samstag, 10. Januar 2009 18:49:40 schrieb John Mandereau:
> >> Have you tried installing libtool-ltdl-devel (or whatever this Fedora
> >> package is called on Ubuntu) system-wide?
> >
> > Yes, it is installed:
> > address@hidden:~$ locate libltdl.so
> > /usr/lib/libltdl.so
> > /usr/lib/libltdl.so.7
> > /usr/lib/libltdl.so.7.1.2
>
> This tells libtool-ltdl is installed, but it tells you nothing about
> libtool-ltdl-dev; is /usr/include/ltdl.h present on your system?

Yes, of course:
address@hidden:~$ locate ltdl.h
/home/lilypond/gub/target/tools/root/usr/include/ltdl.h
/home/lilypond/gub/target/tools/root/usr/share/libtool/libltdl/ltdl.h
/usr/include/ltdl.h
/usr/share/libtool/libltdl/ltdl.h


The problem is that configure is called with the following arguments:

/home/lilypond/gub/target/tools/src/guile-release_1-8-5/configure --
prefix=/home/lilypond/gub/target/tools/install/guile-release_1-8-5-root/usr --
prefix=/home/lilypond/gub/tar
get/tools/root/usr --enable-shared --enable-static CFLAGS=-
I/home/lilypond/gub/target/tools/root/usr/include LDFLAGS=-
L/home/lilypond/gub/target/tools/root/usr/lib --without-threa
ds --with-gnu-ld --enable-deprecated --enable-discouraged --disable-error-on-
warning --enable-relocation --disable-rpath

The LDFLAGS are then passed to the compiler for the configure check for size 
of char. From the configure log file:

configure:22123: checking size of char
configure:22425: gcc -o conftest -
I/home/lilypond/gub/target/tools/root/usr/include  -
L/home/lilypond/gub/target/tools/root/usr/lib conftest.c -lltdl  >&5
configure:22428: $? = 0
configure:22434: ./conftest
./conftest: error while loading shared libraries: libltdl.so.3: cannot open 
shared object file: No such file or directory
configure:22437: $? = 127
configure: program exited with status 127

So, ./conftest ist linked to libltdl from 
/home/lilypond/gub/target/tools/root/usr/lib (explicitly given library paths 
take precedence), but when the configure script calls ./conftest, the 
LD_LIBRARY_PATH does not include that directory any more (and no rpath was 
given to the compiler) -> ERROR 

The error occurs with the size of char configure check, because that's the 
first case, where the compiled test case is actually run.

Cheers,
Reinhold
- -- 
- ------------------------------------------------------------------
Reinhold Kainhofer, address@hidden, http://reinhold.kainhofer.com/
 * Financial & Actuarial Math., Vienna Univ. of Technology, Austria
 * http://www.fam.tuwien.ac.at/, DVR: 0005886
 * LilyPond, Music typesetting, http://www.lilypond.org
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