From 0e635194977672529a49382ce033f6c4806de86f Mon Sep 17 00:00:00 2001 From: Ryan Liptak Date: Wed, 19 Mar 2025 17:15:27 -0700 Subject: [PATCH] Trick the meson build system into thinking `zig rc` is `rc.exe` When determining the type of RC compiler, meson passes `/?` or `--version` and then reads from `stdout` looking for particular string(s) anywhere in the output. So, by adding the string "Microsoft Resource Compiler" to the `/?` output, meson will recognize `zig rc` as rc.exe and give it the correct options, which works fine since `zig rc` is drop-in CLI compatible with rc.exe. This allows using `zig rc` with meson for (cross-)compiling, by either: - Setting WINDRES="zig rc" or putting windres = ['zig', 'rc'] in the cross-file + This will work like rc.exe, so it will output .res files. This will only link successfully if you are using a linker that can do .res -> .obj conversion (so something like zig cc, MSVC, lld) - Setting WINDRES="zig rc /:output-format coff" or putting windres = ['zig', 'rc', '/:output-format', 'coff'] in the cross-file + This will make meson pass flags as if it were rc.exe, but it will cause the resulting .res file to actually be a COFF object file, meaning it will work with any linker that handles COFF object files Example cross file that uses `zig cc` (which can link `.res` files, so `/:output-format coff` is not necessary) and `zig rc`: ``` [binaries] c = ['zig', 'cc', '--target=x86_64-windows-gnu'] windres = ['zig', 'rc'] [target_machine] system = 'windows' cpu_family = 'x86_64' cpu = 'x86_64' endian = 'little' ``` --- lib/compiler/resinator/cli.zig | 1 + lib/compiler/resinator/main.zig | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/lib/compiler/resinator/cli.zig b/lib/compiler/resinator/cli.zig index 7b8ad93547e3..ea867524556f 100644 --- a/lib/compiler/resinator/cli.zig +++ b/lib/compiler/resinator/cli.zig @@ -17,6 +17,7 @@ pub const usage_string_after_command_name = \\This is necessary when the input path begins with a forward slash. \\ \\Supported option prefixes are /, -, and --, so e.g. /h, -h, and --h all work. + \\Drop-in compatible with the Microsoft Resource Compiler. \\ \\Supported Win32 RC Options: \\ /?, /h Print this help and exit. diff --git a/lib/compiler/resinator/main.zig b/lib/compiler/resinator/main.zig index e4ad61c5226c..3266b7921fd8 100644 --- a/lib/compiler/resinator/main.zig +++ b/lib/compiler/resinator/main.zig @@ -81,7 +81,8 @@ pub fn main() !void { defer options.deinit(); if (options.print_help_and_exit) { - try cli.writeUsage(stderr.writer(), "zig rc"); + const stdout = std.io.getStdOut(); + try cli.writeUsage(stdout.writer(), "zig rc"); return; }