You'll need to set CFLAGS and CXXCFLAGS to the equivalent, too. For example:
./configure FCFLAGS=-fdefault-real-8 CFLAGS=-fdefault-real-8 CXXCFLAGS=-fdefault-real-8 ... (I don't know if -fdefault-real-8 is the correct flags for your C and C++ compilers -- you might need to poke through your docs to find the Right flags) > On Dec 19, 2016, at 3:54 AM, 🐋 Jan Hegewald <jan.hegew...@awi.de> wrote: > > >> On 16 Dec 2016, at 20:42, Jeff Squyres (jsquyres) <jsquy...@cisco.com> wrote: >> >> If you don't build Open MPI and your application with the same compiler >> flags, weird things like this are bound to happen. Make sure Open MPI is >> built the same way. > > I have no success building open-mpi with -fdefault-real-8: > > cd openmpi-2.0.1 > FCFLAGS=-fdefault-real-8 ./configure > > ... > checking for C type matching bit representation of REAL*16... pending > checking if long double == REAL*16... no > checking if gnu compiler __float128 == REAL*16... works! > checking for C type matching bit representation of REAL*16... yes > checking if Fortran compiler supports DOUBLE PRECISION... yes > checking size of Fortran DOUBLE PRECISION... 16 > checking for C type corresponding to DOUBLE PRECISION... long double > checking alignment of Fortran DOUBLE PRECISION... 16 > checking for corresponding KIND value of DOUBLE PRECISION... C_LONG_DOUBLE > checking KIND value of Fortran C_LONG_DOUBLE... (cached) 10 > checking if Fortran compiler supports COMPLEX... yes > checking size of Fortran COMPLEX... 16 > checking for C type corresponding to COMPLEX... not found > configure: WARNING: *** Did not find corresponding C type > configure: error: Cannot continue > > > Any ideas? > > --Jan > _______________________________________________ > devel mailing list > devel@lists.open-mpi.org > https://rfd.newmexicoconsortium.org/mailman/listinfo/devel -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/ _______________________________________________ devel mailing list devel@lists.open-mpi.org https://rfd.newmexicoconsortium.org/mailman/listinfo/devel
