OpenBSD ZIG_LIBC support

Simple shell script to build a ZIG_LIBC environment for Zig targeting OpenBSD.

Usage

$ ./build-ziglibc.sh
usage: ./build-ziglibc.sh url output-dir

• url : URL pointing to OpenBSD sets.

  Typical url to use: https://cdn.openbsd.org/pub/OpenBSD/version/platform/

  Please note that OpenBSD officially support only the two last released versions. Snapshots url is also valid for targeting -current, but be aware that it is a moving target.

  Refer to supported platforms list from OpenBSD site web for the name used.

• output-dir : where to put the environment.

  Prefer absolute path: it will be used in generated libc.conf file.

  The directory will be created.

Examples of url

• OpenBSD 6.9 amd64 (x86_64 on Linux world)

  https://cdn.openbsd.org/pub/OpenBSD/6.9/amd64/

• OpenBSD -current i386

  https://cdn.openbsd.org/pub/OpenBSD/snapshots/i386/

Use the environment

$ ZIG_LIBC=path/to/amd64/libc.conf zig build-exe -target x86_64-openbsd -o tests/helloz tests/hello.zig
$ ZIG_LIBC=path/to/amd64/libc.conf zig cc -target x86_64-openbsd -o tests/helloc tests/hello.c

Make shell wrapper

For easy use of crosscompilation, you could create a shell wrapper named x86_64-openbsd-cc:

#!/bin/sh
exec env ZIG_LIBC=path/to/amd64/libc.conf zig cc -target x86_64-openbsd "$@"

And do the same for x86_64-openbsd-c++, x86_64-openbsd-ar, …