Need help using a C library in zig - zig

Question

I am trying to port the microUI library from C into zig.
I have tried using this port attempt https://gitdab.com/luna/zig-microui as a guide post, but it does not seem to work.
Here is a breakdown of my attempt so far:
MicroUI is a very simple program, consisting of one .h file and one .c file. both of these files are located in the root of my project under the folder "./microui".
My build.zig:
const std = #import("std");
const c_args = [_][]const u8{
"-Wall",
"-std=c11",
"-pedantic",
// prevent sigill
"-fno-sanitize=undefined",
};
pub fn build(b: *std.build.Builder) void {
// Standard release options allow the person running `zig build` to select
// between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
const mode = b.standardReleaseOptions();
const lib = b.addStaticLibrary("ZigMicroUI", "src/main.zig");
lib.linkSystemLibrary("c");
lib.linkLibC();
lib.addIncludeDir("./microui");
lib.addCSourceFile("microui/microui.c", &c_args);
lib.setBuildMode(mode);
lib.install();
var main_tests = b.addTest("src/main.zig");
main_tests.setBuildMode(mode);
const test_step = b.step("test", "Run library tests");
test_step.dependOn(&main_tests.step);
}
c.zig:
pub usingnamespace #cImport({
#cInclude("microui.h");
});
Relevant part of main.zig:
const std = #import("std");
const testing = std.testing;
const c = #import("c.zig");
export fn begin_window() void {
const ctx: c.mu_Context = null;
}
Output from 'zig build test':
.\src\c.zig:1:20: error: C import failed
pub usingnamespace #cImport({
^
.\src\c.zig:1:20: note: libc headers not available; compilation does not link against libc
pub usingnamespace #cImport({
^
.\zig-cache\o\013eb3e1efd6fe219480e321f33592ae\cimport.h:1:10: note: 'microui.h' file not found
#include <microui.h>
^
.\src\main.zig:6:16: error: container 'c' has no member called 'mu_Context'
const ctx: c.mu_Context = null;
I feel like this has to be something small that I'm missing if anyone can help.

Answer 1

You have to add the configuration to main_tests too:
main_tests.linkLibC();
main_tests.addIncludeDir("microui");
main_tests.addCSourceFile("microui/microui.c", &c_args);
Then zig build test will work.