Hi all, afaik $FC was meant to be the "overarching" compiler who understands more than one dialect, e.g. gfortran as opposed to g77 and g95, or pgfortran vs. pgf77 for PGI. Afaik autotools files who don't find $FC defined should use the one they require, i.e. $F90. However, probably its not very useful anymore.
Greetings ----- Am 15. Sep 2015 um 16:55 schrieb Kenneth Hoste [email protected]: > Hi Fokko, > > On 15/09/15 14:10, Fokko Masselink wrote: >> Hi, >> >> I'm building OpenMPI 1.10.0 with EasyBuild against an Intel Toolchain with >> GCC >> 4.9.2. >> In the configure step gfortran is used as the Fortran compiler, though we >> want >> to use ifort from Intel of course. >> Turns out (if I'm not mistaken) that the configure of OpenMPI looks for the >> FC >> environment variable and ignores both F77 and F90. >> Can the FC variable be included in the compiler toolchains? > > My guess is that the reason that the framework currently doesn't define > $FC is because it's unclear whether $FC should be set to the value used > in $F77 or $F90... > > This is mostly historic though, since I think $F77 and $F90 are now set > to the same value for all Fortran compilers we support. > > Maybe open an issue for this via > https://github.com/hpcugent/easybuild-framework/issues/new, just so it > doesn't get forgotten easily? > > It's a trivial change to also define $FC, but I fear it may come with > some fallout (some builds may suddenly start failing with having $FC > defined). > > Making a change like this early in the development phase of the next EB > version makes sense, since it's likely we'll pick up any issues caused > by it well before the 2.4.0 release. > > > regards, > > Kenneth >> >> Now I overcome this by adding >> preconfigopts = 'FC=$F90 CFLAGS="%s" CXXFLAGS="%s" FCFLAGS="%s" ' % (....) >> to the easyconfig file >> >> A very basic manual test also shows this behavior: >> $ untar OpenMPI tarball >> $ module load intel >> $ CC=icc CXX=icpc F90=ifort ./configure >> *** Fortran compiler >> checking for gfortran... gfortran >> checking whether we are using the GNU Fortran compiler... yes >> checking whether gfortran accepts -g... yes >> checking whether ln -s works... yes >> checking if Fortran compiler works... yes >> >> Once you start to specify intel specific FCFLAGS the gfortran compiler will >> fail to build software and the configure process is stopped. >> >> If you configure with the following: >> $ untar OpenMPI tarball >> $ module load intel >> $ CC=icc CXX=icpc FC=ifort ./configure >> *** Fortran compiler >> checking whether we are using the GNU Fortran compiler... no >> checking whether ifort accepts -g... yes >> checking whether ln -s works... yes > > checking if Fortran compiler works... yes -- André Gemünd Fraunhofer-Institute for Algorithms and Scientific Computing [email protected] Tel: +49 2241 14-2193 /C=DE/O=Fraunhofer/OU=SCAI/OU=People/CN=Andre Gemuend
