Cross compiling using arm-linux-gnueabihf toolchain does not work with LTO on macOS

[ttc0419]

Source:

int main(void)
{
    return 0;
}

Without LTO, it works: arm-linux-gnueabihf-gcc -fuse-ld=mold conftest.c
However, if I enable LTO, it fails:

[u@h d](master)% arm-linux-gnueabihf-gcc -flto=auto -fuse-ld=mold conftest.c 
libc++abi: terminating due to uncaught exception of type std::__1::__fs::filesystem::filesystem_error: filesystem error: in read_symlink: No such file or directory ["/proc/self/exe"]
mold: aborted
mold: If mold failed due to a spurious failure of pthread_create, it's likely because of https://github.com/oneapi-src/oneTBB/pull/824. You should ensure that you are using 2021.9.0 or newer version of libtbb.
collect2: error: ld returned 1 exit status

[rui314]

/proc/self/exe does not exist on macOS. It seems calling _NSGetExecutablePath is the right way to get the current executable's pathname (https://chat.openai.com/share/89b40115-9778-49d0-b159-705995a3d25e). I'll make that change accordingly.