llvm dev - Apr 2010 - [LLVMdev] Is the option --enable-shared discontinued in 2.7?

Jeffrey Yasskin wrote:
> I just tried it again on trunk (not 2.7) on OSX 10.5, and it works.
> What platform are you on? Does it work with another version of gcc?
>   
Looks like this is platform dependent. libLLVM-2.7.so created has size 
only 4145 bytes and all llvm symbols are missing.
It's empty because there are no .o modules included into it, only 
libraries through -l options were specified in g++ command line.
Libraries normally are specified with -l option to resolve unknown 
imports, not to be just included into .so library.

All .o files should be listed in the command line instead.

Yuri

On 04/28/2010 11:42 AM, Yuri wrote:
> Looks like this is platform dependent. 
Yep, works fine here on Debian 5.0/x86_64 with gcc 4.3.2.

Did you build with make REQUIRES_RTTI=1 which is required
as of LLVM 2.7 to get RTTI for LLVM symbols?

-- 
Pekka

On Wed, Apr 28, 2010 at 1:42 AM, Yuri <yuri at tsoft.com>
wrote:
> Jeffrey Yasskin wrote:
>>
>> I just tried it again on trunk (not 2.7) on OSX 10.5, and it works.
>> What platform are you on? Does it work with another version of gcc?
>>
>
> Looks like this is platform dependent. libLLVM-2.7.so created has size only
> 4145 bytes and all llvm symbols are missing.
> It's empty because there are no .o modules included into it, only
libraries
> through -l options were specified in g++ command line.
> Libraries normally are specified with -l option to resolve unknown imports,
> not to be just included into .so library.
>
> All .o files should be listed in the command line instead.
We currently use two different techniques to get whole libraries
included into the .so. On Linux (gnu ld and gold), we pass
--whole-archive, while on OSX we pass -all_load. Which ld does FreeBSD
use? If you can rearrange tools/llvm-shlib/Makefile until it works for
you and send us a patch, we can probably get it working for llvm-2.8.

Pekka Jääskeläinen wrote:
> On 04/28/2010 11:42 AM, Yuri wrote:
>> Looks like this is platform dependent. 
>
> Yep, works fine here on Debian 5.0/x86_64 with gcc 4.3.2.
>
> Did you build with make REQUIRES_RTTI=1 which is required
> as of LLVM 2.7 to get RTTI for LLVM symbols?
>
No.
If this is a hack to get the command 'g++ -shared -o libLLVM-2.7.so 
-lXXX -lXXX -lXXX ...' to actually produce the full shared library this 
should be done
automatically by Makefile and not exposed to the user.

Yuri

Jeffrey Yasskin wrote:
> We currently use two different techniques to get whole libraries
> included into the .so. On Linux (gnu ld and gold), we pass
> --whole-archive, while on OSX we pass -all_load. Which ld does FreeBSD
> use? If you can rearrange tools/llvm-shlib/Makefile until it works for
> you and send us a patch, we can probably get it working for llvm-2.8.
>   

ld on FreeBSD is from binutils. It takes --whole-archive option. But 
command line needs to be changed: actual archive files should be 
supplied, not just -lXXX. I believe that will fix the problem.

Yuri