zig build does more and in parallel

build.zig

@@ -36,13 +36,87 @@ const cflags = &[_][]const u8{
     //"-D_FORTIFY_SOURCE=2", // consider when optimization flags are enabled
 };
 
+const compilers = &[_][]const u8{ "zig", "clang", "gcc", "tcc" };
+
 pub fn build(b: *std.Build) !void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
 
     const cc = b.option([]const u8, "cc", "C compiler") orelse "zig";
+    const no_exec = b.option(bool, "no-exec", "Compile test binary without running it") orelse false;
 
     const test_step = b.step("test", "Run unit tests");
+    addTestStep(b, test_step, target, optimize, cc, no_exec);
+
+    const fmt_step = b.step("fmt", "clang-format");
+    const clang_format = b.addSystemCommand(&.{ "clang-format", "-i" });
+    for (all_c_files ++ headers) |f| clang_format.addFileArg(b.path(f));
+    fmt_step.dependOn(&clang_format.step);
+
+    const lint_step = b.step("lint", "Run linters");
+
+    const clang_analyze = b.addSystemCommand(&.{
+        "clang",
+        "--analyze",
+        "--analyzer-output",
+        "text",
+        "-Wno-unused-command-line-argument",
+        "-Werror",
+    });
+    for (all_c_files) |cfile| clang_analyze.addFileArg(b.path(cfile));
+    clang_analyze.expectExitCode(0);
+    lint_step.dependOn(&clang_analyze.step);
+
+    const gcc_analyze = b.addSystemCommand(&.{
+        "gcc",
+        "--analyzer",
+        "-Werror",
+        "-o",
+        "/dev/null",
+    });
+    for (all_c_files) |cfile| gcc_analyze.addFileArg(b.path(cfile));
+    gcc_analyze.expectExitCode(0);
+    lint_step.dependOn(&gcc_analyze.step);
+
+    const cppcheck = b.addSystemCommand(&.{
+        "cppcheck",
+        "--quiet",
+        "--error-exitcode=1",
+        "--check-level=exhaustive",
+        "--enable=all",
+        "--suppress=missingIncludeSystem",
+        "--suppress=checkersReport",
+        "--suppress=unusedFunction", // TODO remove after plumbing is done
+        "--suppress=unusedStructMember", // TODO remove after plumbing is done
+        "--suppress=knownConditionTrueFalse", // TODO remove after plumbing is done
+    });
+    for (all_c_files) |cfile| cppcheck.addFileArg(b.path(cfile));
+    cppcheck.expectExitCode(0);
+    lint_step.dependOn(&cppcheck.step);
+
+    const all_step = b.step("all", "Run fmt check, lint, and tests with all compilers");
+    all_step.dependOn(lint_step);
+
+    const fmt_check = b.addSystemCommand(&.{ "clang-format", "--dry-run", "-Werror" });
+    for (all_c_files ++ headers) |f| fmt_check.addFileArg(b.path(f));
+    fmt_check.expectExitCode(0);
+    all_step.dependOn(&fmt_check.step);
+
+    for (compilers) |compiler| {
+        addTestStep(b, all_step, target, optimize, compiler, false);
+    }
+
+    b.default_step = all_step;
+}
+
+fn addTestStep(
+    b: *std.Build,
+    step: *std.Build.Step,
+    target: std.Build.ResolvedTarget,
+    optimize: std.builtin.OptimizeMode,
+    cc: []const u8,
+    no_exec: bool,
+) void {
     const test_mod = b.createModule(.{
         .root_source_file = b.path("test_all.zig"),
         .optimize = optimize,
@@ -63,64 +137,20 @@ pub fn build(b: *std.Build) !void {
             .link_libc = true,
         });
         const lib = b.addLibrary(.{
-            .name = "tokenizer",
+            .name = b.fmt("zig0-{s}", .{cc}),
             .root_module = lib_mod,
         });
         addCSources(b, lib.root_module, cc, optimize);
         test_mod.linkLibrary(lib);
     }
 
-    const no_exec = b.option(bool, "no-exec", "Compile test binary without running it") orelse false;
     const test_exe = b.addTest(.{ .root_module = test_mod });
     if (no_exec) {
         const install = b.addInstallArtifact(test_exe, .{});
-        test_step.dependOn(&install.step);
+        step.dependOn(&install.step);
     } else {
-        test_step.dependOn(&b.addRunArtifact(test_exe).step);
+        step.dependOn(&b.addRunArtifact(test_exe).step);
     }
-
-    const fmt_step = b.step("fmt", "clang-format");
-    const clang_format = b.addSystemCommand(&.{ "clang-format", "-Werror", "-i" });
-    for (all_c_files ++ headers) |f| clang_format.addFileArg(b.path(f));
-    fmt_step.dependOn(&clang_format.step);
-
-    const lint_step = b.step("lint", "Run linters");
-
-    const clang_analyze = b.addSystemCommand(&.{
-        "clang",
-        "--analyze",
-        "--analyzer-output",
-        "text",
-        "-Wno-unused-command-line-argument",
-        "-Werror",
-    });
-    for (all_c_files) |cfile| clang_analyze.addFileArg(b.path(cfile));
-    lint_step.dependOn(&clang_analyze.step);
-
-    const gcc_analyze = b.addSystemCommand(&.{
-        "gcc",
-        "--analyzer",
-        "-Werror",
-        "-o",
-        "/dev/null",
-    });
-    for (all_c_files) |cfile| gcc_analyze.addFileArg(b.path(cfile));
-    lint_step.dependOn(&gcc_analyze.step);
-
-    const cppcheck = b.addSystemCommand(&.{
-        "cppcheck",
-        "--quiet",
-        "--error-exitcode=1",
-        "--check-level=exhaustive",
-        "--enable=all",
-        "--suppress=missingIncludeSystem",
-        "--suppress=checkersReport",
-        "--suppress=unusedFunction", // TODO remove after plumbing is done
-        "--suppress=unusedStructMember", // TODO remove after plumbing is done
-        "--suppress=knownConditionTrueFalse", // TODO remove after plumbing is done
-    });
-    for (all_c_files) |cfile| cppcheck.addFileArg(b.path(cfile));
-    lint_step.dependOn(&cppcheck.step);
 }
 
 fn addCSources(