openmp support

[Tim Prince]

Thomas Yeh wrote:
>   I tried -fopenmp, but it results in the following error when I run the
> binary:
> 
> error while loading shared libraries: libgomp.so.1: cannot open shared
> object file: No such file or directory
> 
> I've looked on the web for libgomp, but it looks like this library has
> been dropped (the gomp webpage shows that gomp has been merged into the
> mainline gcc), and I can't really find a copy of it.
> 
> Tom
> 
> 
> On Thu, 1 Jun 2006, Timothy C Prince wrote:
> 
>>
>> -----Original Message-----
>> From: Thomas Yeh <tomyeh@CS.UCLA.EDU>
>> To: tprince@myrealbox.com
>> Date: Thu, 1 Jun 2006 11:30:39 -0700 (PDT)
>> Subject: Re: openmp support
>>
>> I've tried a small test using the parallel for openmp pragma. The test
>> compiles but the performance looks similar to a serial version. Also, the
>> compiler complains when I use omp_set_num_threads and omp_get_num_threads.
>>
>> Is there a flag I need to use when compiling?
>>
>>
>> -fopenmp
>> Tim Prince
>>
> 

There is a configure option --disable-libgomp.  If that was set, you 
should see it by gcc -v. Not even all tested gcc targets are capable of 
building with libgomp. Otherwise, libgomp should be present:
[tim@tim_pd64 lib64]$ ls
libgcc_s.so           libgomp.so.1.0.0       libssp.la
libgcc_s.so.1         libgomp.spec           libssp_nonshared.a
libgfortran.a         libmudflap.a           libssp_nonshared.la
libgfortranbegin.a    libmudflap.la          libssp.so
libgfortranbegin.la   libmudflap.so          libssp.so.0
libgfortran.la        libmudflap.so.0        libssp.so.0.0.0
libgfortran.so        libmudflap.so.0.0.0    libstdc++.a
libgfortran.so.1      libmudflapth.a         libstdc++.la
libgfortran.so.1.0.0  libmudflapth.la        libstdc++.so
libgomp.a             libmudflapth.so        libstdc++.so.6
libgomp.la            libmudflapth.so.0      libstdc++.so.6.0.9
libgomp.so            libmudflapth.so.0.0.0  libsupc++.a
libgomp.so.1          libssp.a               libsupc++.la

Yes, there are lots of libraries in a fairly minimal build.