cxxmodules: remove support for `CXX_MODULE_HEADER_UNITS` filesets

There's no backing implementation for header units anyways, so just
remove it for now.

16 files changed, 5 insertions, 129 deletions

diff --git a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterface-result.txt b/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterface-result.txt
deleted file mode 100644
index d00491f..0000000
--- a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterface-result.txt
+++ /dev/null
@@ -1 +0,0 @@
-1
diff --git a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterface-stderr.txt b/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterface-stderr.txt
deleted file mode 100644
index d573a02..0000000
--- a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterface-stderr.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-CMake Warning \(dev\) at FileSetModuleHeaderUnitsInterface.cmake:2 \(target_sources\):
-  CMake's C\+\+ module support is experimental.  It is meant only for
-  experimentation and feedback to CMake developers.
-Call Stack \(most recent call first\):
-  CMakeLists.txt:6 \(include\)
-This warning is for project developers.  Use -Wno-dev to suppress it.
-
-CMake Error at FileSetModuleHeaderUnitsInterface.cmake:2 \(target_sources\):
-  target_sources File set TYPEs "CXX_MODULES" and "CXX_MODULE_HEADER_UNITS"
-  may not have "INTERFACE" visibility
-Call Stack \(most recent call first\):
-  CMakeLists.txt:6 \(include\)
diff --git a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterface.cmake b/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterface.cmake
deleted file mode 100644
index 03ca17e..0000000
--- a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterface.cmake
+++ /dev/null
@@ -1,8 +0,0 @@
-add_library(module-header)
-target_sources(module-header
-  INTERFACE
-    FILE_SET fs TYPE CXX_MODULE_HEADER_UNITS FILES
-      sources/module-header.h)
-target_compile_features(module-header
-  PRIVATE
-    cxx_std_20)
diff --git a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterfaceImported-stderr.txt b/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterfaceImported-stderr.txt
deleted file mode 100644
index 1b4ba5d..0000000
--- a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterfaceImported-stderr.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-CMake Warning \(dev\) at FileSetModuleHeaderUnitsInterfaceImported.cmake:2 \(target_sources\):
-  CMake's C\+\+ module support is experimental.  It is meant only for
-  experimentation and feedback to CMake developers.
-Call Stack \(most recent call first\):
-  CMakeLists.txt:6 \(include\)
-This warning is for project developers.  Use -Wno-dev to suppress it.
diff --git a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterfaceImported.cmake b/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterfaceImported.cmake
deleted file mode 100644
index d287198..0000000
--- a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsInterfaceImported.cmake
+++ /dev/null
@@ -1,8 +0,0 @@
-add_library(module-header INTERFACE IMPORTED)
-target_sources(module-header
-  INTERFACE
-    FILE_SET fs TYPE CXX_MODULE_HEADER_UNITS FILES
-      sources/module-header.h)
-target_compile_features(module-header
-  INTERFACE
-    cxx_std_20)
diff --git a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsPrivate-stderr.txt b/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsPrivate-stderr.txt
deleted file mode 100644
index a7ac88e..0000000
--- a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsPrivate-stderr.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-CMake Warning \(dev\) at FileSetModuleHeaderUnitsPrivate.cmake:7 \(target_sources\):
-  CMake's C\+\+ module support is experimental.  It is meant only for
-  experimentation and feedback to CMake developers.
-Call Stack \(most recent call first\):
-  CMakeLists.txt:6 \(include\)
-This warning is for project developers.  Use -Wno-dev to suppress it.
-
-CMake Warning \(dev\):
-  C\+\+20 modules support via CMAKE_EXPERIMENTAL_CXX_MODULE_DYNDEP is
-  experimental.  It is meant only for compiler developers to try.
-This warning is for project developers.  Use -Wno-dev to suppress it.
diff --git a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsPrivate.cmake b/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsPrivate.cmake
deleted file mode 100644
index ebf9853..0000000
--- a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsPrivate.cmake
+++ /dev/null
@@ -1,13 +0,0 @@
-enable_language(CXX)
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_DYNDEP 1)
-set(CMAKE_EXPERIMENTAL_CXX_SCANDEP_SOURCE "")
-
-add_library(module-header
-  sources/cxx-anchor.cxx)
-target_sources(module-header
-  PRIVATE
-    FILE_SET fs TYPE CXX_MODULE_HEADER_UNITS FILES
-      sources/module-header.h)
-target_compile_features(module-header
-  PRIVATE
-    cxx_std_20)
diff --git a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsPublic-stderr.txt b/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsPublic-stderr.txt
deleted file mode 100644
index a5b4ede..0000000
--- a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsPublic-stderr.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-CMake Warning \(dev\) at FileSetModuleHeaderUnitsPublic.cmake:7 \(target_sources\):
-  CMake's C\+\+ module support is experimental.  It is meant only for
-  experimentation and feedback to CMake developers.
-Call Stack \(most recent call first\):
-  CMakeLists.txt:6 \(include\)
-This warning is for project developers.  Use -Wno-dev to suppress it.
-
-CMake Warning \(dev\):
-  C\+\+20 modules support via CMAKE_EXPERIMENTAL_CXX_MODULE_DYNDEP is
-  experimental.  It is meant only for compiler developers to try.
-This warning is for project developers.  Use -Wno-dev to suppress it.
diff --git a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsPublic.cmake b/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsPublic.cmake
deleted file mode 100644
index 3dfccbb5..0000000
--- a/Tests/RunCMake/CXXModules/FileSetModuleHeaderUnitsPublic.cmake
+++ /dev/null
@@ -1,13 +0,0 @@
-enable_language(CXX)
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_DYNDEP 1)
-set(CMAKE_EXPERIMENTAL_CXX_SCANDEP_SOURCE "")
-
-add_library(module-header
-  sources/cxx-anchor.cxx)
-target_sources(module-header
-  PUBLIC
-    FILE_SET fs TYPE CXX_MODULE_HEADER_UNITS FILES
-      sources/module-header.h)
-target_compile_features(module-header
-  PRIVATE
-    cxx_std_20)
diff --git a/Tests/RunCMake/CXXModules/FileSetModulesInterface-stderr.txt b/Tests/RunCMake/CXXModules/FileSetModulesInterface-stderr.txt
index 81a35e8..dfcdbec 100644
--- a/Tests/RunCMake/CXXModules/FileSetModulesInterface-stderr.txt
+++ b/Tests/RunCMake/CXXModules/FileSetModulesInterface-stderr.txt
@@ -6,7 +6,7 @@ Call Stack \(most recent call first\):
 This warning is for project developers.  Use -Wno-dev to suppress it.
 
 CMake Error at FileSetModulesInterface.cmake:2 \(target_sources\):
-  target_sources File set TYPEs "CXX_MODULES" and "CXX_MODULE_HEADER_UNITS"
-  may not have "INTERFACE" visibility
+  target_sources File set TYPE "CXX_MODULES" may not have "INTERFACE"
+  visibility
 Call Stack \(most recent call first\):
   CMakeLists.txt:6 \(include\)
diff --git a/Tests/RunCMake/CXXModules/NotCXXSourceModuleHeaderUnits-result.txt b/Tests/RunCMake/CXXModules/NotCXXSourceModuleHeaderUnits-result.txt
deleted file mode 100644
index d00491f..0000000
--- a/Tests/RunCMake/CXXModules/NotCXXSourceModuleHeaderUnits-result.txt
+++ /dev/null
@@ -1 +0,0 @@
-1
diff --git a/Tests/RunCMake/CXXModules/NotCXXSourceModuleHeaderUnits-stderr.txt b/Tests/RunCMake/CXXModules/NotCXXSourceModuleHeaderUnits-stderr.txt
deleted file mode 100644
index a93eb40..0000000
--- a/Tests/RunCMake/CXXModules/NotCXXSourceModuleHeaderUnits-stderr.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-CMake Warning \(dev\) at NotCXXSourceModuleHeaderUnits.cmake:7 \(target_sources\):
-  CMake's C\+\+ module support is experimental.  It is meant only for
-  experimentation and feedback to CMake developers.
-Call Stack \(most recent call first\):
-  CMakeLists.txt:6 \(include\)
-This warning is for project developers.  Use -Wno-dev to suppress it.
-
-CMake Warning \(dev\):
-  C\+\+20 modules support via CMAKE_EXPERIMENTAL_CXX_MODULE_DYNDEP is
-  experimental.  It is meant only for compiler developers to try.
-This warning is for project developers.  Use -Wno-dev to suppress it.
-
-CMake Error in CMakeLists.txt:
-  Target "not-cxx-source" contains the source
-
-    .*/Tests/RunCMake/CXXModules/sources/c-anchor.c
-
-  in a file set of type "CXX_MODULE_HEADER_UNITS" but the source is not
-  classified as a "CXX" source.
-
-
-CMake Generate step failed.  Build files cannot be regenerated correctly.
diff --git a/Tests/RunCMake/CXXModules/NotCXXSourceModuleHeaderUnits.cmake b/Tests/RunCMake/CXXModules/NotCXXSourceModuleHeaderUnits.cmake
deleted file mode 100644
index af4ddac..0000000
--- a/Tests/RunCMake/CXXModules/NotCXXSourceModuleHeaderUnits.cmake
+++ /dev/null
@@ -1,15 +0,0 @@
-enable_language(C)
-enable_language(CXX)
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_DYNDEP 1)
-set(CMAKE_EXPERIMENTAL_CXX_SCANDEP_SOURCE "")
-
-add_library(not-cxx-source)
-target_sources(not-cxx-source
-  PRIVATE
-    sources/cxx-anchor.cxx
-  PUBLIC
-    FILE_SET fs TYPE CXX_MODULE_HEADER_UNITS FILES
-      sources/c-anchor.c)
-target_compile_features(not-cxx-source
-  PRIVATE
-    cxx_std_20)
diff --git a/Tests/RunCMake/CXXModules/RunCMakeTest.cmake b/Tests/RunCMake/CXXModules/RunCMakeTest.cmake
index b088724..1569f91 100644
--- a/Tests/RunCMake/CXXModules/RunCMakeTest.cmake
+++ b/Tests/RunCMake/CXXModules/RunCMakeTest.cmake
@@ -60,8 +60,7 @@ if (NOT generator_supports_cxx_modules)
 endif ()
 
 set(fileset_types
-  Modules
-  ModuleHeaderUnits)
+  Modules)
 set(scopes
   Interface
   Private
diff --git a/Tests/RunCMake/target_sources/FileSetDefaultWrongTypeExperimental-stderr.txt b/Tests/RunCMake/target_sources/FileSetDefaultWrongTypeExperimental-stderr.txt
index 042d67d..5356b07 100644
--- a/Tests/RunCMake/target_sources/FileSetDefaultWrongTypeExperimental-stderr.txt
+++ b/Tests/RunCMake/target_sources/FileSetDefaultWrongTypeExperimental-stderr.txt
@@ -6,7 +6,6 @@ Call Stack \(most recent call first\):
 This warning is for project developers.  Use -Wno-dev to suppress it.
 
 CMake Error at FileSetDefaultWrongTypeExperimental\.cmake:[0-9]+ \(target_sources\):
-  target_sources File set TYPE may only be "HEADERS", "CXX_MODULES", or
-  "CXX_MODULE_HEADER_UNITS"
+  target_sources File set TYPE may only be "HEADERS" or "CXX_MODULES"
 Call Stack \(most recent call first\):
   CMakeLists\.txt:[0-9]+ \(include\)$
diff --git a/Tests/RunCMake/target_sources/FileSetWrongTypeExperimental-stderr.txt b/Tests/RunCMake/target_sources/FileSetWrongTypeExperimental-stderr.txt
index a1b784f..5c75000 100644
--- a/Tests/RunCMake/target_sources/FileSetWrongTypeExperimental-stderr.txt
+++ b/Tests/RunCMake/target_sources/FileSetWrongTypeExperimental-stderr.txt
@@ -6,7 +6,6 @@ Call Stack \(most recent call first\):
 This warning is for project developers.  Use -Wno-dev to suppress it.
 
 CMake Error at FileSetWrongTypeExperimental\.cmake:[0-9]+ \(target_sources\):
-  target_sources File set TYPE may only be "HEADERS", "CXX_MODULES", or
-  "CXX_MODULE_HEADER_UNITS"
+  target_sources File set TYPE may only be "HEADERS" or "CXX_MODULES"
 Call Stack \(most recent call first\):
   CMakeLists\.txt:[0-9]+ \(include\)$