[kangoo_boo]

Hello,
me and two developpers want to port their work to Darwin. I'm the one who best known darwin altough i didn't even have it, so I'm doing it via ssh on a friend MacOSX computer (I'll have a G4 soon

However we have a problem with libstdc++, because the program is written in c++. On linux we use libnsl. This lib doesn't exist on darwin.
Here's the make error log:

Code:
% make
cc -g -Wall -pedantic -D_REENTRANT -DDARWIN -shared -o libhl.so hlbaseobject.o h
lconnection.o hlexception.o hlglobal.o hlobject.o hlsocket.o hlsysdep.o hltransa
ction.o hltransfer.o -lstdc++ -lpthread
/usr/bin/ld: Undefined symbols:
_main
___builtin_delete
___builtin_new
___builtin_vec_delete
___builtin_vec_new
___cp_pop_exception
___cp_push_exception
___eh_rtime_match
___rtti_ptr
___rtti_si
___start_cp_handler
___throw
___uncatch_exception
_terminate__Fv
___eh_alloc
___tfi
___rtti_user
make: *** [libhl.so] Error 1

Since I can't find many c++ example programs for darwin around the web, and Apple Developper site isn't (or don't seems) very informative about our problems... I wonder if anyone know the solution :-)

It would be very cool indeed =)

Thanx you much,
kang

------------------
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[lindberg]

I don't know too much about C++ builds, but you might want to use cc++ instead of cc as the command...

As for building shared libraries -- which I think is the main problem -- here's a post from Torrey Lyons from the darwin-development list:

At 2:30 PM -0700 5/9/01, Pierce T. Wetter III wrote:
>cc -g -Wall -fPIC -I. -I.. -I/usr/local/include -I../jabberd/ -shared
>-o pthsock_client.so client.o -L/usr/local/lib -lpth
>
>
> I'm trying to build the Jabber (www.jabber.org) server for Mac OS X.
>
> The above line, which is supposed to be building a shared library
>gives me a whole bunch of link errors instead.
>
> Since one of them is _main, This is probably because I'm missing a
>command line option, that somehow replaces -shared, so its trying to
>build a command instead of a shared library.

The general recipe for building dynamic shared libraries on Darwin is:

1. Compile your object files with the -fno-common option. This isn't
strictly necessary as long as you initialize all your global
variables, but ported code rarely does.

2. Use "-dynamiclib -undefined suppress" to build the dynamic shared
library. Dynamic shared libraries on Darwin use the .dylib suffix
instead of .so.

So a complete build might look like:

cc -fno-common -o afile.o afile.c
cc -fno-common -o bfile.o bfile.c
cc -dynamiclib -undefined suppress -o ablibrary.dylib afile.o bfile.o

PIC options are not necessary because PowerPC code is always position
independent and the Darwin option to generate position independent
code, -dynamic, is on by default.

--Torrey

[kangoo_boo]

cc++ command doesn't exist...
also I tried to use the other tips but I get the same error
for the dynlibs, i think the c++ lib is libstdc++.a, which don't seems to be dynamic :/
thanx anyway

[lindberg]

Sorry, I meant c++, not cc++.

And yes, I don't think there's a dynamic version of libstdc++ around. Not sure if that will prevent you from building a shared library from your stuff or not.

[Angus_D]

Originally posted by lindberg:
Not sure if that will prevent you from building a shared library from your stuff or not.

I'm pretty sure it won't.