Commit f01c3150c1

@@ -82,6 +82,15 @@ pub fn main() !void {
                     return usageAndErr(builder, false, stderr_stream);
                 };
                 builder.addSearchPrefix(search_prefix);
+            } else if (mem.eql(u8, arg, "--color")) {
+                const next_arg = nextArg(args, &arg_idx) orelse {
+                    warn("expected [auto|on|off] after --color", .{});
+                    return usageAndErr(builder, false, stderr_stream);
+                };
+                builder.color = std.meta.stringToEnum(@TypeOf(builder.color), next_arg) orelse {
+                    warn("expected [auto|on|off] after --color, found '{}'", .{next_arg});
+                    return usageAndErr(builder, false, stderr_stream);
+                };
             } else if (mem.eql(u8, arg, "--override-lib-dir")) {
                 builder.override_lib_dir = nextArg(args, &arg_idx) orelse {
                     warn("Expected argument after --override-lib-dir\n\n", .{});
@@ -171,6 +180,7 @@ fn usage(builder: *Builder, already_ran_build: bool, out_stream: anytype) !void
         \\  --verbose                   Print commands before executing them
         \\  --prefix [path]             Override default install prefix
         \\  --search-prefix [path]      Add a path to look for binaries, libraries, headers
+        \\  --color [auto|off|on]       Enable or disable colored error messages
         \\
         \\Project-Specific Options:
         \\

@@ -45,6 +45,7 @@ pub const Builder = struct {
     verbose_llvm_ir: bool,
     verbose_cimport: bool,
     verbose_llvm_cpu_features: bool,
+    color: enum { auto, on, off } = .auto,
     invalid_user_input: bool,
     zig_exe: []const u8,
     default_step: *Step,
@@ -1946,6 +1947,11 @@ pub const LibExeObjStep = struct {
         };
         zig_args.append(cmd) catch unreachable;
 
+        if (builder.color != .auto) {
+            try zig_args.append("--color");
+            try zig_args.append(@tagName(builder.color));
+        }
+
         if (self.root_src) |root_src| try zig_args.append(root_src.getPath(builder));
 
         var prev_has_extra_flags = false;