https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65541
--- Comment #9 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> --- (In reply to John from comment #8) > Hi, > > It seems that some testing was required after all. With the latest gcc > snapshot from Debian (20150329-1) I still get the same output from the test > code: > Full testing was done. For me here, if you do not explicitly set the LD_LIBRARY_PATH its possible to compile with one version of gfortran and execute with another library. So, try it with -static to make sure that is not the issue. Also I did confirm with your example in your original post here that output from 5. is compatible with 4.9 and the 4.9 compiled with -static could actually read correctly output generated by 5.0. My comment about testing relates to not being able to run 4.9 and 5.0 automatically in our test suite. If you still see a problem, let me know, maybe there is something else going on.
