From f1b4ffa568c91302057da14e611368dcf9244953 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 9 Nov 2023 08:21:42 +0200
Subject: Enable named modules tests for Clang 16 or later (but not on Windows)

---
 tests/cc/modules/common.testscript  | 9 ++++++---
 tests/cc/modules/modules.testscript | 4 +---
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/tests/cc/modules/common.testscript b/tests/cc/modules/common.testscript
index 50dc865..2aa19d1 100644
--- a/tests/cc/modules/common.testscript
+++ b/tests/cc/modules/common.testscript
@@ -21,7 +21,8 @@ cxx.std = experimental
 cxx.features.symexport = true
 
 # @@ TMP revise
-if ($cxx.id == 'gcc')
+if ($cxx.id == 'gcc' || \
+    ($cxx.id.type == 'clang' && $cxx.version.major >= 16))
   cxx.features.modules = true
 
 using cxx
@@ -38,7 +39,7 @@ if ($cxx.target.class == 'windows')
 exe{*}: test = true
 EOI
 
-# Determine if we have modules and header units support.
+# Determine if we have named modules and header units support.
 #
 +$* noop <<EOI | set modules
 print $cxx.features.modules
@@ -49,8 +50,10 @@ print ($cxx.features.modules && $cxx.id == 'gcc')
 EOI
 
 # @@ TMP: modules support is broken in MinGW GCC (not just symexport).
+# @@ TMP: try modules with Clang on Windows (symexport is likely broken).
 #
-if ($cxx.target.class == 'windows' && $cxx.id == 'gcc')
+if ($cxx.target.class == 'windows' && \
+    ($cxx.id == 'gcc' || $cxx.id.type == 'clang'))
   modules = false
   headers = false
 end
diff --git a/tests/cc/modules/modules.testscript b/tests/cc/modules/modules.testscript
index 8762885..7e860fd 100644
--- a/tests/cc/modules/modules.testscript
+++ b/tests/cc/modules/modules.testscript
@@ -205,15 +205,13 @@ $* test clean <<EOI
 :
 : Test global module fragment/leading module marker (module;).
 :
-if ($cxx.id != 'msvc') # Disabled for MSVC due to issue 845845.
+if ($cxx.id != 'msvc') # Disabled for MSVC due to issue 845845. @@ TMP revise
 {
 cat <<EOI >=g.hxx;
 void g ();
 EOI
 cat <<EOI >=core.mxx;
-#if __cpp_modules >= 201810
 module;
-#endif
 
 #include "g.hxx"
 EOI
-- 
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