I tried to send this earlier, but it seemed to get lost in space, so I thought I'd try once more.
---------- Forwarded message ---------- From: Sean Patrick Santos <quanthe...@gmail.com> Date: Wed, Nov 14, 2012 at 7:08 PM Subject: NAG support To: libtool@gnu.org Hi all, I recently built netCDF (which currently uses some older libtool), and found that a few changes to libtool.m4 were necessary: http://www.unidata.ucar.edu/software/netcdf/patches/nag_netcdf.diff Funnily enough, most of these changes have already gone into libtool, and look almost exactly the same. However, the line setting whole_archive_flag_spec still seems to be missing from the current libtool. So I'd like to request that (I don't know whether "enhancement" or "bug" is the right label here). I've also tried to build OpenMPI, and found that building gcc/NAG is afflicted by the same problem as builds that use gcc/pgf90, namely that the -pthread flag is not respected by the Fortran compiler, but libtool will add the flag when linking against a static library built with -pthread (I think that's what happens?). This is a more severe problem for NAG than PGI, since there is no separate C compiler for NAG, unlike pgf90 which can be paired with pgcc to ensure that all the flags are consistent. I actually don't know what the "right" fix is for this. Perhaps there is some simple workaround that OpenMPI can use, but I think they consider this a libtool issue, so I wanted to ask about it here. A similar issue might arise for openmp, since gcc -fopenmp corresponds to nagfor -openmp, but I don't know of any actual problems from that. -Sean On Wed, Nov 14, 2012 at 7:08 PM, Sean Patrick Santos <quanthe...@gmail.com>wrote: > Hi all, > > I recently built netCDF (which currently uses some older libtool), and > found that a few changes to libtool.m4 were necessary: > > http://www.unidata.ucar.edu/software/netcdf/patches/nag_netcdf.diff > > Funnily enough, most of these changes have already gone into libtool, > and look almost exactly the same. However, the line setting > whole_archive_flag_spec still seems to be missing from the current > libtool. So I'd like to request that (I don't know whether > "enhancement" or "bug" is the right label here). > > I've also tried to build OpenMPI, and found that building gcc/NAG is > afflicted by the same problem as builds that use gcc/pgf90, namely > that the -pthread flag is not respected by the Fortran compiler, but > libtool will add the flag when linking against a static library built > with -pthread (I think that's what happens?). This is a more severe > problem for NAG than PGI, since there is no separate C compiler for > NAG, unlike pgf90 which can be paired with pgcc to ensure that all the > flags are consistent. > > I actually don't know what the "right" fix is for this. Perhaps there > is some simple workaround that OpenMPI can use, but I think they > consider this a libtool issue, so I wanted to ask about it here. A > similar issue might arise for openmp, since gcc -fopenmp corresponds > to nagfor -openmp, but I don't know of any actual problems from that. > > -Sean >
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