mjklemm wrote: > I see. So Fortran and C interoperability of F2003/F2008 is not supported yet > in Flang?
It's rather untested and I'm working hard to get it fixed, so that we have well-defined behavior that is similar to other Fortran compilers like ifx and gfortran. > Those ~100ish regression test cases we have were passing before this PR > though. Unfortunately, those test cases are not made public available yet. I > think I can copy the source code of one test case here, but it needs to be > run manually. Please let me know if that is desired to help debug the reason > of the regression. Please share as many of these reproducers as you can, so that I can debug the regression and fix it. ``` ld.lld: error: duplicate symbol: main >>> defined at ./bind_c09i.c >>> bind_c09i.o:(.The_Code) >>> defined at Fortran_main.c >>> Fortran_main.c.o:(.text.main+0x0) in archive ./libFortran_main.a flang-new: error: linker command failed with exit code 1 (use -v to see invocation) ``` This error message is a strong indication of potentially two things: - Both Fortran and C/C++ provide the `main` entry point (Fortran via `Fortran_main.a` and C/C++ via a `main` function). Since this led to some weird behavior in the past, this situation now leads to an error message. - On C/C++ provides the `main` function. In this case, please pass `-fno-fortran-main` when using `flang-new` link command line. This will remove the `main` symbol coming from `Fortran_main.a`, because it's not needed. https://github.com/llvm/llvm-project/pull/73124 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
