https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105456
--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jerry DeLisle <jvdeli...@gcc.gnu.org>: https://gcc.gnu.org/g:21edfb0051ed8d0ff46d5638c2bce2dd71f26d1f commit r14-9328-g21edfb0051ed8d0ff46d5638c2bce2dd71f26d1f Author: Jerry DeLisle <jvdeli...@gcc.gnu.org> Date: Tue Mar 5 20:49:23 2024 -0800 Fortran: Add user defined error messages for UDTIO. The defines IOMSG_LEN and MSGLEN were redundant so these are combined into IOMSG_LEN as defined in io.h. The remainder of the patch adds checks for when a user defined derived type IO procedure sets the IOSTAT or IOMSG variables independent of the librrary defined I/O messages. PR libfortran/105456 libgfortran/ChangeLog: * io/io.h (IOMSG_LEN): Moved to here. * io/list_read.c (MSGLEN): Removed MSGLEN. (convert_integer): Changed MSGLEN to IOMSG_LEN. (parse_repeat): Likewise. (read_logical): Likewise. (read_integer): Likewise. (read_character): Likewise. (parse_real): Likewise. (read_complex): Likewise. (read_real): Likewise. (check_type): Likewise. (list_formatted_read_scalar): Adjust to IOMSG_LEN. (nml_read_obj): Add user defined error message. * io/transfer.c (unformatted_read): Add user defined error message. (unformatted_write): Add user defined error message. (formatted_transfer_scalar_read): Add user defined error message. (formatted_transfer_scalar_write): Add user defined error message. * io/write.c (list_formatted_write_scalar): Add user defined error message. (nml_write_obj): Add user defined error message. gcc/testsuite/ChangeLog: * gfortran.dg/pr105456-nmlr.f90: New test. * gfortran.dg/pr105456-nmlw.f90: New test. * gfortran.dg/pr105456-ruf.f90: New test. * gfortran.dg/pr105456-wf.f90: New test. * gfortran.dg/pr105456-wuf.f90: New test.