Re: Patch to support PGI compiler option to append libraries to the link step

[Christopher Hulbert]

On Tue, Jun 16, 2009 at 2:05 PM, Ralf Wildenhues<address@hidden> wrote:
> Hello Christopher,
>
> * Christopher Hulbert wrote on Tue, Jun 16, 2009 at 05:40:09PM CEST:
>> PGI has compiler options to append libraries for PGI-compiled fortran
>> and C++ code when performing a link. The attached patch lets
>> ltmain.m4sh recognize them.
>
> Please explain what these switches do (or point to documentation),
> so we can find out whether it's the right thing for libtool to just
> ignore and pass through these switches, or whether it would need to
> take any further action.

-pgcpplibs         Append C++ libraries to the link line
-pgf77libs          Append pgf77 libraries to the link line
-pgf90libs          Append pgf90 libraries to the link line

More documentation can be found in the PGI users guide
(http://www.pgroup.com/doc/pgiug.pdf).
>
> Other than that, you can use `-Wc,FLAG' or `-Xcompiler FLAG' to get
> flags by libtool, undetected, as a workaround.

I know how to get flags by libtool. It didn't seem these were any less
useful than the -tp switches, so I submitted it. Instead of using the
autoconf-generated FCLIBS information from AC_FC_LIBRARY_LDFLAGS, I
set FCLIBS=-pgf90libs. That flag gets put into my pkg-config file Libs
information. Then when using pkg-config --libs, the -pgf90libs flag
shows up, but libtool strips it out.

Chris

>
> Thanks,
> Ralf
>
>> --- a/libltdl/config/ltmain.m4sh
>> +++ b/libltdl/config/ltmain.m4sh
>> @@ -4496,8 +4496,10 @@ func_mode_link ()
>>        # -p, -pg, --coverage, -fprofile-* pass through profiling flag for GCC
>>        # @file GCC response files
>>        # -tp=* Portland pgcc target processor selection
>> +      # -pgf77libs, -pgf90libs, -pgcpplibs Portland compiler opts to append 
>> lib
>>        -64|-mips[0-9]|-r[0-9][0-9]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*| \
>> -      -t[45]*|-txscale*|-p|-pg|--coverage|-fprofile-*|-F*|@*|-tp=*)
>> +      
>> -t[45]*|-txscale*|-p|-pg|--coverage|-fprofile-*|-F*|@*|-tp=*|-pgcpplibs|
>> +      -pgf77libs|-pgf90libs)
>
>