[Crosstool] Importance of message about "link against installed libraries"?

Martin Egholm Nielsen martin@egholm-nielsen.dk
Tue Jul 20 07:24:00 GMT 2004


>> In the final phase of compiling a crosscompiler with Crosstool 
>> (0.28rc28), it rapidly flashes something like the following across the 
>> screen:
>> ==== 8< ====
>> Libraries have been installed in:
>>
>> /opt/crosstool/powerpc-405-linux-gnu/gcc-3.4.1-glibc-2.2.5/powerpc-405-linux-gnu/lib/nof 
>>
>>
>> If you ever happen to want to link against installed libraries
>> in a given directory, LIBDIR, you must either use libtool, and
>> specify the full pathname of the library, or use the `-LLIBDIR'
>> flag during linking and do at least one of the following:
>>    - add LIBDIR to the `LD_LIBRARY_PATH' environment variable
>>      during execution
>>    - add LIBDIR to the `LD_RUN_PATH' environment variable
>>      during linking
>>    - use the `-Wl,--rpath -Wl,LIBDIR' linker flag
>>    - have your system administrator add LIBDIR to `/etc/ld.so.conf'
>>
>> ==== 8< ====
>> How much should one care about this message?
> That warning is from glibc's Makefile.
> The suggestions are appropriate if you're trying to run the apps
> with the libraries where they were installed.
> For instance, when I build a gcc-3.4 toolchain with crosstool, and
> want to run the resulting apps on my development system, I add
> LIBDIR to LD_LIBRARY_PATH before running (well, actually I copy
> just two .so's to an empty directory and add that to LD_LIBRARY_PATH,
> since all I need are the new .so's not already on my system.)
Ok, that's exactly the same I do...

Thanks,
  Martin



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