[Bug ada/112352] Building gcc-12 ada fails with "error: cannot locate file system.ads"

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112352

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
cd gcc-12.3.0
./configure --enable-languages=c,c++,ada,lto --disable-multilib
make -j$(nproc)

do not configure in source dir, use a separate directory:

cd gcc-12.3.0
mkdir obj
cd obj
./configure --enable-languages=c,c++,ada,lto --disable-multilib
make -j$(nproc)