Separate lib into its own build step

README.md

@@ -161,7 +161,7 @@ resulting in potentially much smaller code size for minimal impact on performanc
 
 ## C Library
 
-Running `zig build` will generate a static C library in `zig-out/lib` and a header file in `zig-out/include`.
+Running `zig build lib` will generate a static C library in `zig-out/lib` and a header file in `zig-out/include`.
 The header file requires `zig.h` which is located in the `lib_dir` output by running `zig env`.
 
 This process should improve as https://github.com/ziglang/zig/issues/13528 is resolved.

build.zig

@@ -37,14 +37,16 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
         .root_source_file = .{ .path = "src/lib.zig" },
     });
-    b.installArtifact(lib);
+    const lib_install = b.addInstallArtifact(lib, .{});
+
     // Ideally we would use dlib.getEmittedH(), but https://github.com/ziglang/zig/issues/18497
-    _ = lib.getEmittedH(); // Needed to trigger generation
+    _ = lib.getEmittedH(); // Needed to trigger header generation
     const lib_header = b.addInstallFile(.{ .path = "zig-cache/fastlanez.h" }, "include/fastlanez.h");
-    lib_header.step.dependOn(&lib.step);
-    b.getInstallStep().dependOn(&lib_header.step);
+    lib_header.step.dependOn(&lib_install.step);
 
-    // const lib_header_file = .{ .step = &lib.step, .path = "/Users/ngates/git/fastlanez/zig-cache/fastlanez.h" };
+    const lib_step = b.step("lib", "Build static C library");
+    lib_step.dependOn(&lib_header.step);
+    lib_step.dependOn(&lib_install.step);
 
     // Unit Tests
     const unit_tests = b.addTest(.{