https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95095
--- Comment #1 from Fangrui Song <i at maskray dot me> ---
I just learned that `int main() {}` compiles to .text.startup in -O2 or -Os
It seems that .text.startup. may be better to not accidentally move a C
function named `startup` (`startup.` is not a valid C identifier)
