On 2/26/24 21:59, Vru Inbvi via Gcc-help wrote:
Hi, If I install for instance Ubuntu 22.04 with the default compilers (from apt install) on computers with AMD and Intel processors, and run my application I get the same results, bit for bit. However if I install a different version of GCC and GFORTRAN from source I get different results. Which configuration options should I use make my install processor-independent and get the same results? VI
I don't exactly understand what it is you're trying to say here, exactly... If you're installing different versions of GCC (e.g. GCC 12 and GCC 13) then I would hope it is obvious enough that the different versions will pretty much always output different code - even for minor version updates this can often occur. If the issue is that your application appears to exhibit different behavior (and not just have differing executable artifacts) depending on the version this is most likely due to a bug in your program, which you might be able to find using checkers like `-fsanitize` or others, or, much less likely, there is a bug in one of the two versions of GCC you used to compile the code.
