Date: Fri, 10 Feb 2006 10:17:29 -0800 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: freebsd-current@freebsd.org Subject: [jakub@redhat.com:Linking against libpthread via -pthread? Message-ID: <20060210181715.GA21782@troutmask.apl.washington.edu>
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Some background information: I routinely build GCC mainline
on i386-*-freebsd and amd64-*-freebsd. GCC mainline is introducing
OpenMP support. When libgomp.so.1 is built, the compiler is
given the -pthread option throughout the construction of libgomp.so.1.
However, a "ldd libgomp.so.1" shows no dependence on libpthread.so.2
Anyone have an answer to Jakub's question below.
----- Forwarded message from Jakub Jelinek <jakub@redhat.com> -----
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Date: Fri, 10 Feb 2006 13:04:25 -0500
From: Jakub Jelinek <jakub@redhat.com>
To: Steve Kargl <sgk@troutmask.apl.washington.edu>
Cc: gcc-patches@gcc.gnu.org, fortran@gcc.gnu.org
Subject: Re: [gomp merge] Stage 2: OpenMP for the Fortran front end (take 2)
Reply-To: Jakub Jelinek <jakub@redhat.com>
In-Reply-To: <20060210170929.GA43794@troutmask.apl.washington.edu>
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On Fri, Feb 10, 2006 at 09:09:29AM -0800, Steve Kargl wrote:
> jakub and I have discussed. The other failures are probably
> due to FreeBSD's loader. I'll pursue that issue on the FreeBSD
> mailing lists.
libgomp.so.0 not linking against libpthread.so.* is indeed IMHO a FreeBSD
bug.
For FreeBSD 6+, there is:
#define FBSD_LIB_SPEC " \
%{!shared: \
%{!pg: %{pthread:-lpthread} -lc} \
%{pg: %{pthread:-lpthread_p} -lc_p} \
}"
#endif
This means that -pthread doesn't imply -lpthread for -shared.
Can anyone from the FreeBSD crowd explain why it isn't
%{pthread:-lpthread%{pg:_p}} %{!shared:-lc%{pg:_p}}
or better yet, why isn't -lc linked in automatically as well for -shared?
Jakub
----- End forwarded message -----
--
Steve
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