Re: Problem with '-L' switch.

[Ralf Wildenhues]

Hello Vaclav,

Please keep the mailing list in Cc:. Thanks.

* Vaclav Havlik wrote on Wed, Aug 16, 2006 at 04:28:06PM CEST:
> > 
> /bin/sh ~/work/PAS/libtool --debug --tag=CXX --mode=link g++  -Wall -g 
> -D_REENTRANT -D_FILE_OFFSET_BITS=64 -pedantic -Wno-long-long -L../../lib 
> -L/opt/pas/lib -L/opt/pas/lib64 -L../../lib -L/opt/pas/lib -L/opt/pas/lib64 
> -o libPASncl.la -rpath /home/Vaclav/shared/lib -version-info 1:0:0 PASncl.lo 
> PASnclThreads.lo PASnclSimple.lo PASnclMt.lo PASnclUtils.lo PASnclQueue.lo 
> PASnclSSL.lo CJobNumber.lo -lpas -lssl 1>debug1.txt 2>debug2.txt
[...]
> g++ -shared -nostdlib /usr/lib/gcc/i386-redhat-linux/3.4.5/../../../crti.o 
> /usr/lib/gcc/i386-redhat-linux/3.4.5/crtbeginS.o  .libs/PASncl.o 
> .libs/PASnclThreads.o .libs/PASnclSimple.o .libs/PASnclMt.o 
> .libs/PASnclUtils.o .libs/PASnclQueue.o .libs/PASnclSSL.o .libs/CJobNumber.o  
> -Wl,--rpath -Wl,/home/Vaclav/work/PAS/lib/.libs -Wl,--rpath 
> -Wl,/home/Vaclav/shared/lib -L/usr/lib -L/home/Vaclav/work/PAS/lib/.libs 
> -L/home/Vaclav/work/PAS/lib -L/opt/pas/lib -L/opt/pas/lib64 
> /home/Vaclav/work/PAS/lib/.libs/libpas.so -lssl 
> -L/usr/lib/gcc/i386-redhat-linux/3.4.5 
> -L/usr/lib/gcc/i386-redhat-linux/3.4.5/../../.. -lstdc++ -lm -lc -lgcc_s 
> /usr/lib/gcc/i386-redhat-linux/3.4.5/crtendS.o 
> /usr/lib/gcc/i386-redhat-linux/3.4.5/../../../crtn.o  -Wl,-soname 
> -Wl,libPASncl.so.1 -o .libs/libPASncl.so.1.0.0

The addition of `-L/usr/lib' is a genuine Libtool bug.
The cause is the non-normalization of the search paths:

> # Compile-time system search path for libraries
> sys_lib_search_path_spec=" /usr/lib/gcc/i386-redhat-linux/3.4.5/ 
> /usr/lib/gcc/i386-redhat-linux/3.4.5/ 
> /usr/lib/gcc/i386-redhat-linux/3.4.5/../../../../i386-redhat-linux/lib/i386-redhat-linux/3.4.5/
>  /usr/lib/gcc/i386-redhat-linux/3.4.5/../../../../i386-redhat-linux/lib/ 
> /usr/lib/gcc/i386-redhat-linux/3.4.5/../../../i386-redhat-linux/3.4.5/ 
> /usr/lib/gcc/i386-redhat-linux/3.4.5/../../../ /lib/i386-redhat-linux/3.4.5/ 
> /lib/ /usr/lib/i386-redhat-linux/3.4.5/ /usr/lib/"

Note how the above contains `/usr/lib/' instead of `/usr/lib' at the
very end?  Please try the following: edit the libtool script, and remove
the final slash.  (The sys_lib_search_path_spec is initialized once near
the beginning of the libtool script, and several times at the end, for
C++ and other languages.  Edit all instances.)  Please report back if
that fixes it.

By the way:

> # Run-time system search path for libraries
> sys_lib_dlsearch_path_spec="/lib /usr/lib include ld.so.conf.d/*.conf 
> /usr/X11R6/lib /usr/local/lib "

This should be fixed in a newer Libtool release.

Cheers,
Ralf