2021-11-08 19:54:45 +01:00
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OpenBSD ZIG_LIBC support
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========================
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Simple shell script to build a `ZIG_LIBC` environment for [Zig](https://ziglang.org/) targeting [OpenBSD](https://www.openbsd.org/).
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Usage
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-----
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```
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$ ./build-ziglibc.sh
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usage: ./build-ziglibc.sh url output-dir
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```
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- *url* : URL pointing to OpenBSD sets.
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Typical url to use: https://cdn.openbsd.org/pub/OpenBSD/*version*/*platform*/
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Please note that OpenBSD officially support only the two last
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released versions. Snapshots url is also valid for targeting
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-current, but be aware that it is a moving target.
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Refer to [supported platforms](https://www.openbsd.org/plat.html)
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list from OpenBSD site web for the name used.
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- *output-dir* : where to put the environment.
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Prefer absolute path: it will be used in generated `libc.conf` file.
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The directory will be created.
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Examples of url
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---------------
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- OpenBSD 6.9 [amd64](https://www.openbsd.org/amd64.html) (x86_64 on Linux world)
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https://cdn.openbsd.org/pub/OpenBSD/6.9/amd64/
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- OpenBSD -current [i386](https://www.openbsd.org/i386.html)
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https://cdn.openbsd.org/pub/OpenBSD/snapshots/i386/
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Use the environment
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-------------------
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```
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2021-11-08 20:04:58 +01:00
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$ ZIG_LIBC=path/to/amd64/libc.conf zig build-exe -target x86_64-openbsd -o tests/helloz tests/hello.zig
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$ ZIG_LIBC=path/to/amd64/libc.conf zig cc -target x86_64-openbsd -o tests/helloc tests/hello.c
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2021-11-08 19:54:45 +01:00
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```
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Make shell wrapper
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------------------
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For easy use of crosscompilation, you could create a shell wrapper
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named `x86_64-openbsd-cc`:
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```
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#!/bin/sh
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exec env ZIG_LIBC=path/to/amd64/libc.conf zig cc -target x86_64-openbsd "$@"
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```
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And do the same for `x86_64-openbsd-c++`, `x86_64-openbsd-ar`, …
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