https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79512
--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> --- Created attachment 40743 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40743&action=edit Demonstrator patch. Uses flag_openmp_simd in DEF_GOMP_BUILTIN This patch roughly restores the situation from before r224745. With the patch, and after renaming the test function to main, we get: ... $ gcc test.c -fopenmp-simd /tmp/ccPdaFhw.o: In function `main': test.c:(.text+0x4e): undefined reference to `GOMP_target_ext' collect2: error: ld returned 1 exit status ... Here ( https://gcc.gnu.org/ml/gcc-patches/2013-10/msg02275.html ) I read about fopenmp-simd: ... This patch add the new option "-fopenmp-simd", which allows to use OpenMP 4.0's "simd" pragmas without enabling OpenMP's threading or target features - and, thus, it also doesn't require linking of libgomp. ... The fact that libgomp is required by the generated code, seems to mean that the test-case is not a valid fopenmp-simd testcase. This is confirmed by the fact that "#pragma omp target teams" is not listed as supported pragma in the gcc-patches message above. I think the correct handling in this case would be to ignore the pragmas, which currently is not done, and that's probably the root cause of the ICE.
