build: Rename -Dtest-slow-targets to -Dtest-extra-targets.

This can be used more broadly for targets that aren't quite ready to be tested
by default yet.

Author: alexrp

build.zig

@@ -380,7 +380,7 @@ pub fn build(b: *std.Build) !void {
 
     const test_filters = b.option([]const []const u8, "test-filter", "Skip tests that do not match any filter") orelse &[0][]const u8{};
     const test_target_filters = b.option([]const []const u8, "test-target-filter", "Skip tests whose target triple do not match any filter") orelse &[0][]const u8{};
-    const test_slow_targets = b.option(bool, "test-slow-targets", "Enable running module tests for targets that have a slow compiler backend") orelse false;
+    const test_extra_targets = b.option(bool, "test-extra-targets", "Enable running module tests for additional targets") orelse false;
 
     var chosen_opt_modes_buf: [4]builtin.OptimizeMode = undefined;
     var chosen_mode_index: usize = 0;
@@ -437,7 +437,7 @@ pub fn build(b: *std.Build) !void {
     test_modules_step.dependOn(tests.addModuleTests(b, .{
         .test_filters = test_filters,
         .test_target_filters = test_target_filters,
-        .test_slow_targets = test_slow_targets,
+        .test_extra_targets = test_extra_targets,
         .root_src = "test/behavior.zig",
         .name = "behavior",
         .desc = "Run the behavior tests",
@@ -453,7 +453,7 @@ pub fn build(b: *std.Build) !void {
     test_modules_step.dependOn(tests.addModuleTests(b, .{
         .test_filters = test_filters,
         .test_target_filters = test_target_filters,
-        .test_slow_targets = test_slow_targets,
+        .test_extra_targets = test_extra_targets,
         .root_src = "test/c_import.zig",
         .name = "c-import",
         .desc = "Run the @cImport tests",
@@ -468,7 +468,7 @@ pub fn build(b: *std.Build) !void {
     test_modules_step.dependOn(tests.addModuleTests(b, .{
         .test_filters = test_filters,
         .test_target_filters = test_target_filters,
-        .test_slow_targets = test_slow_targets,
+        .test_extra_targets = test_extra_targets,
         .root_src = "lib/compiler_rt.zig",
         .name = "compiler-rt",
         .desc = "Run the compiler_rt tests",
@@ -484,7 +484,7 @@ pub fn build(b: *std.Build) !void {
     test_modules_step.dependOn(tests.addModuleTests(b, .{
         .test_filters = test_filters,
         .test_target_filters = test_target_filters,
-        .test_slow_targets = test_slow_targets,
+        .test_extra_targets = test_extra_targets,
         .root_src = "lib/c.zig",
         .name = "universal-libc",
         .desc = "Run the universal libc tests",
@@ -500,7 +500,7 @@ pub fn build(b: *std.Build) !void {
     test_modules_step.dependOn(tests.addModuleTests(b, .{
         .test_filters = test_filters,
         .test_target_filters = test_target_filters,
-        .test_slow_targets = test_slow_targets,
+        .test_extra_targets = test_extra_targets,
         .root_src = "lib/std/std.zig",
         .name = "std",
         .desc = "Run the standard library tests",

test/tests.zig

@@ -30,11 +30,9 @@ const TestTarget = struct {
     strip: ?bool = null,
     skip_modules: []const []const u8 = &.{},
 
-    // This is intended for targets that are known to be slow to compile. These are acceptable to
-    // run in CI, but should not be run on developer machines by default. As an example, at the time
-    // of writing, this included LLVM's MIPS backend which takes upwards of 20 minutes longer to
-    // compile tests than other backends. (No longer the case.)
-    slow_backend: bool = false,
+    // This is intended for targets that are known to be slow to compile, or require a newer LLVM
+    // version than is present on the CI machines, etc.
+    extra_target: bool = false,
 };
 
 const test_targets = blk: {
@@ -1363,7 +1361,7 @@ pub fn addRunTranslatedCTests(
 const ModuleTestOptions = struct {
     test_filters: []const []const u8,
     test_target_filters: []const []const u8,
-    test_slow_targets: bool,
+    test_extra_targets: bool,
     root_src: []const u8,
     name: []const u8,
     desc: []const u8,
@@ -1388,7 +1386,7 @@ pub fn addModuleTests(b: *std.Build, options: ModuleTestOptions) *Step {
             }
         }
 
-        if (!options.test_slow_targets and test_target.slow_backend) continue;
+        if (!options.test_extra_targets and test_target.extra_target) continue;
 
         if (options.skip_non_native and !test_target.target.isNative())
             continue;