On Mon, Apr 12, 2021 at 5:30 AM Jonathan Wakely via Gcc-help < gcc-help@xxxxxxxxxxx> wrote: > On Mon, 12 Apr 2021 at 13:10, John Hendry wrote: > > I'm trying to install gcc-10.3.0 on a 64-bit PC running > Crux Linux 3.5. Make gives the error "bit_AVX512VPTINTERSECT not declared" > in cpuinfo.c, line 392 or so, and then AVX512BF16 is not declared 4 lines > later. > > The bit_AVX512VP2INTERSECT constant is defined in the cpuid.h header > in the same directory. > But note that there is more than one cpuid.h file on the system, as there is also one provided by the OS and/or system compiler, and possibly also by cross compilers. I've seen this problem happen for people that have environment variables set that they forgot about, which are causing the wrong cpuid.h file to be used. Or maybe you are using a compiler with a modified specs file, or maybe something else is going wrong. The system compiler one is probably older than the gcc version you are trying to compile, and hence is missing all of the new entries in the file. This macro is new in gcc-10, and thus would not be present in a gcc-9 or earlier cpuid.h file. So you need to look at the compiler command for the cpuid.c file and figure out why it is using the wrong cpuid.h file. You can use --save-temps to generate a .i file that will show which cpuid.h file is being used. You can add -v to see what header file paths are being used during the compilation. You can use --print-search-dirs to see what the default search paths are. printenv will show you what environment variables are set. Jim
