I simply try to include stdio.h like this: // Compiler Test
// #include <assert.h> #include <stdio.h> int main() { printf("Hallo\n"); // assert(2 != 1); return 0; } tom@Toms-Mac-Pro Misc % gcc-mp-10 test.c -o test In file included from test.c:4: /opt/local/lib/gcc10/gcc/x86_64-apple-darwin20/10.2.0/include-fixed/stdio.h:78:10: fatal error: _stdio.h: No such file or directory 78 | #include <_stdio.h> | ^~~~~~~~~~ compilation terminated. > On 1. Jan 2021, at 04:19, Ken Cunningham <ken.cunningham.web...@gmail.com> > wrote: > >> But gcc 10/9/8/7/6 does not work. It does not find even stdio.h >> How can I fix this? > > Hello! > > Now you know we want to help you — that’s just who we are, crazy as it seems > — but there is just not enough information in this question to make any > headway. > > Don’t keep us hanging! Give us a clue what is wrong :> > > K