E.g.:
const c = b.addTranslateC(.{
.root_source_file = b.path("src/c.c"),
.link_libc = true,
.target = target,
.optimize = optimize,
});
const exe = b.addExecutable(.{
.name = "my-program",
.root_module = b.createModule(.{
.root_source_file = b.path("src/root.zig"),
.target = target,
.optimize = optimize,
.imports = &.{
.{ .name = "c", .module = c.createModule() },
},
}),
});
Then you do const c = @import("c"); wherever you want to use the translated headers.