Is the std module compiled by default when building?

[Alberto Gcchelp]

Hi

I plan to build (and use) GCC 15 right after relesase. Building GCC takes
several hours on my computer, so I would prefer to get it right at the
first try.

Does building the std module require any configure option?

I tried `import std;` on compiler exporer and doesn't seem to be available
there. I also looked at https://gcc.gnu.org/gcc-15/changes.html

Perhaps should i compile it myself before use so that it is available in
gcm.cache? If thats the cas, where is std.cc going to be installed?

Thanks so much