Andrew Kelley 142471fcc4 zig build system: change target, compilation, and module APIs
Introduce the concept of "target query" and "resolved target". A target
query is what the user specifies, with some things left to default. A
resolved target has the default things discovered and populated.
In the future, std.zig.CrossTarget will be rename to std.Target.Query.
Introduces `std.Build.resolveTargetQuery` to get from one to the other.

The concept of `main_mod_path` is gone, no longer supported. You have to
put the root source file at the module root now.

* remove deprecated API
* update build.zig for the breaking API changes in this branch
* move std.Build.Step.Compile.BuildId to std.zig.BuildId
* add more options to std.Build.ExecutableOptions, std.Build.ObjectOptions,
  std.Build.SharedLibraryOptions, std.Build.StaticLibraryOptions, and
  std.Build.TestOptions.
* remove `std.Build.constructCMacro`. There is no use for this API.
* deprecate `std.Build.Step.Compile.defineCMacro`. Instead,
  `std.Build.Module.addCMacro` is provided.
  - remove `std.Build.Step.Compile.defineCMacroRaw`.
* deprecate `std.Build.Step.Compile.linkFrameworkNeeded`
  - use `std.Build.Module.linkFramework`
* deprecate `std.Build.Step.Compile.linkFrameworkWeak`
  - use `std.Build.Module.linkFramework`
* move more logic into `std.Build.Module`
* allow `target` and `optimize` to be `null` when creating a Module.
  Along with other fields, those unspecified options will be inherited
  from parent `Module` when inserted into an import table.
* the `target` field of `addExecutable` is now required. pass `b.host`
  to get the host target.
2024-01-01 17:51:18 -07:00

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Zig

const std = @import("std");
pub fn build(b: *std.Build) void {
const main = b.addTest(.{
.root_source_file = .{ .path = "src/main.zig" },
.target = b.host,
.optimize = .Debug,
});
const options = b.addOptions();
main.addOptions("build_options", options);
options.addOption(bool, "bool_true", b.option(bool, "bool_true", "t").?);
options.addOption(bool, "bool_false", b.option(bool, "bool_false", "f").?);
options.addOption(u32, "int", b.option(u32, "int", "i").?);
const E = enum { one, two, three };
options.addOption(E, "e", b.option(E, "e", "e").?);
options.addOption([]const u8, "string", b.option([]const u8, "string", "s").?);
const test_step = b.step("test", "Run unit tests");
test_step.dependOn(&b.addRunArtifact(main).step);
}