Created attachment 207920 [details] v1 SuiteSparse doesn't use Fortran source and after bug 208120 there's no need to worry about RPATH for libgcc_s. Testing postponed until the next update. The change provides little value on its own.
$ grep -i fortran ./SuiteSparse_config/SuiteSparse_config.mk BLAS = -lrefblas -lgfortran -lstdc++ # use the Intel ifort compiler for Fortran codes # standard Fortran LAPACK along with OpenBLAS to obtain very good # make BLAS='-lacml -lgfortran' # Fortran compiler (not required for 'make' or 'make library') # A Fortran compiler is optional. Only required for the optional Fortran F77 ?= gfortran ## BLAS = -lrefblas -lgfortran @echo 'Fortran compiler: F77= ' '$(F77)' @echo 'Fortran flags: F77FLAGS= ' '$(F77FLAGS)' So it seems that Fortran is optional: # A Fortran compiler is optional. Only required for the optional Fortran # interfaces to AMD and UMFPACK. Not needed by 'make' or 'make install' Does anyone need these interfaces? Note: if we adopt the proposed patch, maintainership should be dropped from fortran mailing list.
I was just building suitesparse 5.8.0. If I remove "fortran" from USES, I get this error: ===> suitesparse-5.8.0 is marked as broken: USES=gmake is incompatible with cmake's ninja-generator. If I also remove "gmake" from USES, I get another error: ===> Building for suitesparse-5.8.0 ninja: error: loading 'build.ninja': No such file or directory So it seems to me that we do need USES=fortran.
Please note that after the split of math/suitesparse into several ports, only math/suitesparse-amd uses fortran. I'm not sure how it is used, and we could probably make it optional.