I have very base question about GNU/Libtool. My project is build by GNU/autotools and contains the shared object build by GNU/Libtool. I want to compile the i386 shared object on the x86-64 machine, so I do:
$ ./configure --build=i386
checking for a BSD-compatible install... /usr/bin/install -c
...
checking whether to build shared libraries... no
checking whether to build static libraries... yes
...
config.status: executing depfiles commands
config.status: executing libtool commands
$
The configure script tell me the the shared libraries are not supported, and the make command fails. How to fix this cross-compile issue?
Should I find the answer in Libtool manual?
--build is typically for things like Canadian cross compilation. You probably want to use the --host option. You haven't specified the system type, but if ./config.guess gives something like:
x86_64-apple-darwin or x86_64-pc-linux-gnu
Then you would specifiy
--host=i386-apple-darwin or i386-pc-linux-gnu
Also - you may need to set some compiler flags to force 32-bit code generation. e.g.,
env CC="gcc -m32" ./configure --host=....
Often, the -m32 option is sufficient - you won't need to bother with the --host option.