Ralf Wildenhues wrote:
> * Bob Friesenhahn wrote on Wed, Aug 26, 2009 at 05:01:18AM CEST:
>> Is someone here willing to contribute a portable m4 macro which
>> tests the compiler (and/or linker) to prove beyond a shadow of a
>> doubt that it adequately supports the implicit linkage required? The
>> tests should work for more than Linux and should be based on
>> observed behavior.
>
> Is support in Debian full now?
I'm not sure what you mean by this.
> Do dlopen'ed modules that have indirect
> dependencies outside of default-searched library paths get loaded
> correctly now, with DT_RPATH entries only pointing to direct deplibs
> (and recursively for their DT_RPATH entries)?
This works fine without linking in dependency_libs. I continue the test
from my earlier message:
$ cd ../enchant-1.4.2
$ ./configure --prefix=/home/anssi/odd/usr \
--libdir=/home/anssi/odd/usr/lib \
LDFLAGS=-L/home/anssi/odd/usr/lib \
CPPFLAGS=-I/home/anssi/odd/usr/include
$ make && make install
$ sed -i "s,^dependency_libs=.*$,dependency_libs=''," \
/home/anssi/odd/usr/lib/libenchant.la \
/home/anssi/odd/usr/lib/enchant/libenchant_*.la
$ /home/anssi/odd/usr/bin/enchant-lsmod | grep voikko
voikko (Voikko Provider)
$ objdump -p /home/anssi/odd/usr/lib/enchant/libenchant_voikko.so | grep
-e NEEDED.*voik -e RPA
NEEDED libvoikko.so.1
RPATH /home/anssi/odd/usr/lib
$ objdump -p /home/anssi/odd/usr/lib/libvoikko.so.1 | grep -e malaga
-e RPATH
NEEDED libmalaga.so.7
RPATH /home/anssi/odd/lib
$ ls /home/anssi/odd/lib/libmalaga.so.7
/home/anssi/odd/lib/libmalaga.so.7@
So when enchant dlopens libenchant_voikko.so, the dependency on
libvoikko.so.1 and in turn its dependency on libmalaga.so.7 in another
directory are resolved fine.
>> Support for indirect dependencies should be a configure option so
>> that it should be specifically requested.
>
> See $link_all_deplibs (which is "no" on Debian but "yes" in FSF
> Libtool).
IIRC link_all_deplibs only affects executables, not libraries.
The comment describing link_all_deplibs seems to agree:
# Whether libtool must link a program against all its dependency libraries.
--
Anssi Hannula
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