Support C++20 Modules in clang-repl (#79261)
This comes from when I playing around clang-repl with moduels : )
I succeeded to import std with https://libcxx.llvm.org/Modules.html and
calling `std::printf` after this patch.
I want to put the documentation part to
https://clang.llvm.org/docs/StandardCPlusPlusModules.html in a separate
commit.
diff --git a/clang/test/Interpreter/cxx20-modules.cppm b/clang/test/Interpreter/cxx20-modules.cppm
new file mode 100644
index 0000000..bc2b722
--- /dev/null
+++ b/clang/test/Interpreter/cxx20-modules.cppm
@@ -0,0 +1,31 @@
+// UNSUPPORTED: system-aix
+//
+// RUN: rm -rf %t
+// RUN: mkdir -p %t
+// RUN: split-file %s %t
+//
+// RUN: %clang -std=c++20 %t/mod.cppm --precompile \
+// RUN: -o %t/mod.pcm
+// RUN: %clang %t/mod.pcm -c -o %t/mod.o
+// RUN: %clang -shared %t/mod.o -o %t/libmod.so
+//
+// RUN: cat %t/import.cpp | env LD_LIBRARY_PATH=%t:$LD_LIBRARY_PATH \
+// RUN: clang-repl -Xcc=-std=c++20 -Xcc=-fmodule-file=M=%t/mod.pcm \
+// RUN: | FileCheck %t/import.cpp
+
+//--- mod.cppm
+export module M;
+export const char* Hello() {
+ return "Hello Interpreter for Modules!";
+}
+
+//--- import.cpp
+
+%lib libmod.so
+
+import M;
+
+extern "C" int printf(const char *, ...);
+printf("%s\n", Hello());
+
+// CHECK: Hello Interpreter for Modules!
