Hi Tristan, > I am starting to build fortran for VMS.
Thanks for the patch and this endeavor. > The first serious issue was with libgfortran/configure. It checks for > several math functions, but directly in libm using AC_CHECK_LIB. > But there is on such things as libm on VMS systems I think after building you will run into the same issue when using gfortran. The linking of -lm is hardcoded in gcc/fortran/gfortranspec.c (search there for MATH_LIBRARY). And it is hard coded in libgfortran/libgfortran.spec.in and in the as-needed check of libgfortran/acinclude.m4 within a libquadmath check. Talking about libquadmath, its libquadmath/configure.ac has the same issue. * * * To your patch: First, I am far from being a configure expert and thus would like if a build maintainer could have a look (or Janne, who seems to have also more experience.) I don't understand the purpose of the line: +# Check for libm +AC_CHECK_LIB([m],[sin]) Except of printing to stdout and to the logs whether -lm is available and contains "sin", it doesn't seem to do anything. If that's the purpose, I think it needs a better comment. If not, I would like to know its purpose. Otherwise, the patch looks fine to me - but as written, I would like if someone else (build maintainer, Janne, ...) could have a look. Tobias
