Performing C SOURCE FILE Test C_SUPPORTS_DOLLAR succeeded with the following output:
Change Dir: /var/tmp/portage/media-radio/js8call-2.2.0/work/js8call-2.2.0_build/CMakeFiles/FortranCInterface/VerifyCXX/CMakeFiles/FortranCInterface/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/ninja cmTC_25860 && [1/2] Building C object CMakeFiles/cmTC_25860.dir/src.c.o
[2/2] Linking C executable cmTC_25860


Source file was:

extern int dollar$(void);
int main() { return 0; }