add Makefile.clang-cl

clang-cl does not support `-x` currently.
llvm/llvm-project#88006

On Unix, install https://github.com/mstorsjo/msvc-wine to /opt/msvc,
and pass CXXFLAGS="-winsysroot /opt/msvc -fuse-ld=lld" to Makefile.

header-unit/Makefile.clang-cl

@@ -0,0 +1,18 @@
+default: hello.exe
+
+hello.pcm: hello.hpp
+ clang-cl /std:c++20 /clang:--precompile /clang:-fmodule-header hello.hpp $(CXXFLAGS)
+
+iostream.pcm:
+ clang-cl /std:c++20 /clang:--precompile -x c++-system-header iostream $(CXXFLAGS) && \
+ echo /clang:-fmodule-file=iostream.pcm > modules.obj || \
+ echo "" > modules.obj
+
+hello.exe: main.cpp hello.pcm iostream.pcm
+##### Only -fmodule-file=.pcm works for header units.
+##### With the existing implementation -fprebuilt-module-path cannot be used for header units (since they are nominally anonymous).
+ clang-cl /std:c++20 /clang:-fmodule-file=hello.pcm @modules.obj main.cpp /Fe:hello.exe $(CXXFLAGS)
+
+clean:
+ -rm *.pcm *.obj *.exe
+ -del *.pcm *.obj *.exe

module-impl/Makefile.clang-cl

@@ -0,0 +1,18 @@
+default:
+ clang-cl /std:c++20 /clang:-fmodule-output /clang:-fprebuilt-module-path=. hello.cppm impl.cpp main.cpp /Fe:hello.exe $(CXXFLAGS)
+
+hello.obj hello.pcm: hello.ixx
+ clang-cl /std:c++20 /clang:-fmodule-output /c hello.cppm $(CXXFLAGS)
+
+impl.obj: impl.cpp hello.pcm
+ clang-cl /std:c++20 /clang:-fprebuilt-module-path=. /c impl.cpp $(CXXFLAGS)
+
+main.obj: main.cpp hello.pcm
+ clang-cl /std:c++20 /clang:-fprebuilt-module-path=. /c main.cpp $(CXXFLAGS)
+
+hello.exe: main.obj hello.obj impl.obj
+ clang-cl main.obj hello.obj impl.obj /Fe:hello.exe $(CXXFLAGS)
+
+clean:
+ -rm *.pcm *.obj *.exe
+ -del *.pcm *.obj *.exe

module-impl/hello.cppm

@@ -0,0 +1 @@
+#include "hello.ixx"

module-partition/Makefile.clang-cl

@@ -0,0 +1,24 @@
+#default:
+# The default -fmodule-output of partitions are not same as used by -fprebuilt-module-path.
+# clang-cl /std:c++20 /clang:-fmodule-output /clang:-fprebuilt-module-path=. internal.cppm interface.cppm hello.cppm main.cpp /Fe:hello.exe $(CXXFLAGS)
+
+default: hello.exe
+
+internal.obj hello-internal.pcm: internal.cppm
+ clang-cl /std:c++20 /c internal.cppm /clang:-fmodule-output=hello-internal.pcm $(CXXFLAGS)
+
+interface.obj hello-interface.pcm: interface.cppm hello-internal.pcm
+ clang-cl /std:c++20 /clang:-fprebuilt-module-path=. /c interface.cppm /clang:-fmodule-output=hello-interface.pcm $(CXXFLAGS)
+
+hello.obj hello.pcm: hello.ixx hello-interface.pcm
+ clang-cl /std:c++20 /clang:-fprebuilt-module-path=. /c hello.cppm /clang:-fmodule-output $(CXXFLAGS)
+
+main.obj: main.cpp hello.pcm
+ clang-cl /std:c++20 /clang:-fprebuilt-module-path=. /c main.cpp $(CXXFLAGS)
+
+hello.exe: main.obj hello.obj interface.obj internal.obj
+ clang-cl main.obj hello.obj interface.obj internal.obj /Fe:hello.exe $(CXXFLAGS)
+
+clean:
+ -rm *.pcm *.obj *.exe
+ -del *.pcm *.obj *.exe

module-partition/hello.cppm

@@ -0,0 +1 @@
+#include "hello.ixx"

named-module/Makefile.clang-cl

@@ -0,0 +1,18 @@
+# https://clang.llvm.org/docs/StandardCPlusPlusModules.html
+# BMI: Built Module Interface
+
+default:
+ clang-cl /std:c++20 /clang:-fmodule-output /clang:-fprebuilt-module-path=. hello.cppm main.cpp /Fe:hello.exe $(CXXFLAGS)
+
+hello.obj hello.pcm: hello.cppm
+ clang-cl /std:c++20 /clang:-fmodule-output /c hello.cppm $(CXXFLAGS)
+
+main.obj: main.cpp hello.pcm
+ clang-cl /std:c++20 /clang:-fprebuilt-module-path=. /c main.cpp $(CXXFLAGS)
+
+hello.exe: main.obj hello.obj
+ clang-cl main.obj hello.obj /Fe:hello.exe $(CXXFLAGS)
+
+clean:
+ -rm *.pcm *.obj *.exe
+ -del *.pcm *.obj *.exe

shared-lib/Makefile.clang-cl

@@ -0,0 +1,14 @@
+hello.exe: main.cpp hello.lib hello.pcm
+ clang-cl /std:c++20 /clang:-fprebuilt-module-path=. \
+ /Zc:dllexportInlines- \
+ main.cpp /Fe:hello.exe hello.lib $(CXXFLAGS) /Zi /link /PDB:hello.exe.pdb /INCREMENTAL:NO
+
+hello.dll hello.lib hello.pcm: hello.ixx
+ clang-cl /std:c++20 /clang:-fprebuilt-module-path=. /clang:-fmodule-output /LD \
+ /Zc:dllexportInlines- \
+ hello.cppm impl.cpp $(CXXFLAGS) /Zi /link /PDB:hello.dll.pdb
+
+clean:
+ -rm *.pcm *.obj *.exe *.exp *.lib *.dll *.pdb
+ -del *.pcm *.obj *.exe *.exp *.lib *.dll *.pdb
+

shared-lib/hello.cppm

@@ -0,0 +1 @@
+#include "hello.ixx"