On Wed, 10 Dec 2025 at 10:15, Mario Jaime Martín Burgos via Gcc <[email protected]> wrote: > > I have following the instructions to compile and install GCC 15.2.0 from: > GCC 15.1 with C++26 on Ubuntu | by Alex Lykov | > Medium<https://medium.com/@xersendo/moving-to-c-26-how-to-build-and-set-up-gcc-15-1-on-ubuntu-f52cc9173fa0> > (I changed the checkout gcc-15.1.0 to gcc-15.2.0)
This mailing list is for discussion the development of GCC itself, not support. Please use the gcc-help mailing list instead. https://gcc.gnu.org/lists.html Please take any follow-up replies to that list instead. I don't know why the isl C files are being compiled with a C++ compiler, maybe you messed up the update-alternatives command for an earlier GCC install and you have g++ installed as gcc? In any case, the isl prerequisite is optional, so if you remove everything and start again, adding --no-isl to the ./contrib/download_prerequisites script, then the build process will not use isl at all.
