From 8f7f3c1f99169409e7a03cb1e03bcaac6ae82f6f Mon Sep 17 00:00:00 2001
From: Louis Dionne <ldionne.2@gmail.com>
Date: Tue, 15 Feb 2022 13:10:16 -0500
Subject: [PATCH] [libc++] Pass -fcxx-modules during our modules builds

Otherwise, AppleClang ignores -fmodules entirely, so we are not actually
testing anything.

Differential Revision: https://reviews.llvm.org/D119862
---
 libcxx/utils/libcxx/test/params.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libcxx/utils/libcxx/test/params.py b/libcxx/utils/libcxx/test/params.py
index 211cd18..81a7d84 100644
--- a/libcxx/utils/libcxx/test/params.py
+++ b/libcxx/utils/libcxx/test/params.py
@@ -76,6 +76,7 @@ DEFAULT_PARAMETERS = [
             actions=lambda modules: [
               AddFeature('modules-build'),
               AddCompileFlag('-fmodules'),
+              AddCompileFlag('-fcxx-modules'), # AppleClang disregards -fmodules entirely when compiling C++. This enables modules for C++.
             ] if modules else []),
 
   Parameter(name='enable_exceptions', choices=[True, False], type=bool, default=True,
-- 
2.7.4