bug#74217: Bootstrapping Zig with no Binary Blobs

["Motiejus Jakštys" <motiejus@jakstys.lt>]

On Thu, Nov 14, 2024 at 11:22 AM Hilton Chain <hako@ultrarare.space> wrote:
>
> On Thu, 14 Nov 2024 14:05:52 +0800,
> Hilton Chain wrote:
> I also have concern for Zig's relying on /usr/bin/env (Zig uses an ELF file to
> find dynamic linker, env is chosen for it's well-known).  We have patched this
> reference, not sure if it will cause issue for cross-building Zig.

This file is only consulted when `-target=native`. I.e. when it needs
to compile for the host. If target is specified, it will not consult
that file.

Just verified with zig 0.13.0:

$ strace -f -e openat zig cc hello.c -o hello |& grep -w env
openat(AT_FDCWD,
"/nix/store/sf6y4arqcm100rnnl3dhpg732i774zp6-coreutils-9.5/bin/env",
O_RDONLY|O_NOCTTY|O_CLOEXEC) = 5
$ strace -f -e openat zig cc -target x86_64-linux-gnu.2.32 hello.c -o
hello |& grep -w env
$

Motiejus