test: Test the clang-scan-deps wrapper

.github/workflows/build.yml

@@ -266,7 +266,7 @@ jobs:
           ./build-all.sh $(pwd)/install/llvm-mingw --disable-clang-tools-extra --disable-lldb $ARGS
           .github/workflows/store-version.sh install/llvm-mingw/versions.txt
           ./copy-msys-dependencies.sh $(pwd)/install/llvm-mingw ${{matrix.sys}}
-          ./test-libcxx-module.sh $(pwd)/install/llvm-mingw
+          NATIVE=1 ./test-libcxx-module.sh $(pwd)/install/llvm-mingw
           ./run-tests.sh $(pwd)/install/llvm-mingw
           cd install
           NAME=llvm-mingw-$TAG-ucrt-msys2-${{matrix.sys}}
@@ -362,7 +362,7 @@ jobs:
       - uses: actions/checkout@v4
       - name: Run tests
         run: |
-          ./test-libcxx-module.sh /llvm-mingw
+          NATIVE=1 ./test-libcxx-module.sh /llvm-mingw
           ./run-tests.sh /llvm-mingw
           ./run-lldb-tests.sh /llvm-mingw
 

test-libcxx-module.sh

@@ -30,4 +30,10 @@ for arch in $ARCHS; do
     # TODO: This should ideally use "$CXX -print-file-name=libc++.modules.json", then parse the json to find the relevant cppm file and include directory.
     $arch-w64-mingw32-clang++ -I$PREFIX/share/libc++/v1 -std=gnu++23 -Wno-reserved-module-identifier -x c++-module -fmodule-output=std.pcm -o std.cppm.obj -c $PREFIX/share/libc++/v1/std.cppm
     $arch-w64-mingw32-clang++ -I$PREFIX/share/libc++/v1 -std=gnu++23 -Wno-reserved-module-identifier -x c++-module -fmodule-output=std.compat.pcm -fmodule-file=std=std.pcm -o std.compat.cppm.obj -c $PREFIX/share/libc++/v1/std.compat.cppm
+    $arch-w64-mingw32-clang-scan-deps -format=p1689 -- $arch-w64-mingw32-clang++ -std=c++23 -c test/test-scan-deps.cpp -DEXPECT_$arch
 done
+
+if [ -n "$NATIVE" ]; then
+    # Test the unprefixed clang-scan-deps wrapper.
+    clang-scan-deps -format=p1689 -- clang++ -std=c++23 -c test/test-scan-deps.cpp -DEXPECT_$(clang++ -dumpmachine | sed 's/-.*//')
+fi

test/test-scan-deps.cpp

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2024 Martin Storsjo
+ *
+ * This file is part of llvm-mingw.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+// Test that clang-scan-deps can locate c++ standard library headers
+#include <version>
+
+// Test that we have set the expected architecture defines.
+#if defined(__x86_64__)
+#ifndef EXPECT_x86_64
+#include <intentionally-missing-header>
+#endif
+#elif defined(__i386__)
+#ifndef EXPECT_i686
+#include <intentionally-missing-header>
+#endif
+#elif defined(__aarch64__)
+#ifndef EXPECT_aarch64
+#include <intentionally-missing-header>
+#endif
+#elif defined(__arm__)
+#ifndef EXPECT_armv7
+#include <intentionally-missing-header>
+#endif
+#endif