RunCMake/CXXModules: test installation of BMIs and interfaces

Tests/RunCMake/CXXModules/RunCMakeTest.cmake

@@ -104,12 +104,22 @@ function (run_cxx_module_test directory)
     set(RunCMake_TEST_OPTIONS -DCMAKE_BUILD_TYPE=Debug)
   endif ()
 
+  if (RunCMake_CXXModules_INSTALL)
+    set(prefix "${RunCMake_BINARY_DIR}/examples/${test_name}-install")
+    file(REMOVE_RECURSE "${prefix}")
+    list(APPEND RunCMake_TEST_OPTIONS
+      "-DCMAKE_INSTALL_PREFIX=${prefix}")
+  endif ()
+
   list(APPEND RunCMake_TEST_OPTIONS
     "-DCMake_TEST_MODULE_COMPILATION_RULES=${CMake_TEST_MODULE_COMPILATION_RULES}"
     ${ARGN})
   run_cmake("examples/${test_name}")
   set(RunCMake_TEST_NO_CLEAN 1)
   run_cmake_command("examples/${test_name}-build" "${CMAKE_COMMAND}" --build . --config Debug)
+  if (RunCMake_CXXModules_INSTALL)
+    run_cmake_command("examples/${test_name}-install" "${CMAKE_COMMAND}" --build . --target install --config Debug)
+  endif ()
   run_cmake_command("examples/${test_name}-test" "${CMAKE_CTEST_COMMAND}" -C Debug --output-on-failure)
 endfunction ()
 
@@ -136,3 +146,12 @@ endif ()
 if ("internal_partitions" IN_LIST CMake_TEST_MODULE_COMPILATION)
   run_cxx_module_test(internal-partitions)
 endif ()
+
+# All of the following tests perform installation.
+set(RunCMake_CXXModules_INSTALL 1)
+
+# Tests which install BMIs
+if ("install_bmi" IN_LIST CMake_TEST_MODULE_COMPILATION)
+  run_cxx_module_test(install-bmi)
+  run_cxx_module_test(install-bmi-and-interfaces)
+endif ()

Tests/RunCMake/CXXModules/examples/cxx-modules-find-bmi-and-interfaces.cmake

@@ -0,0 +1,22 @@
+function (check_for_bmi prefix destination name)
+  set(found 0)
+  foreach (ext IN ITEMS gcm)
+    if (EXISTS "${prefix}/${destination}/${name}.${ext}")
+      set(found 1)
+      break ()
+    endif ()
+  endforeach ()
+
+  if (NOT found)
+    message(SEND_ERROR
+      "Failed to find the ${name} BMI")
+  endif ()
+endfunction ()
+
+function (check_for_interface prefix destination subdir name)
+  set(found 0)
+  if (NOT EXISTS "${prefix}/${destination}/${subdir}/${name}")
+    message(SEND_ERROR
+      "Failed to find the ${name} module interface")
+  endif ()
+endfunction ()

Tests/RunCMake/CXXModules/examples/cxx-modules-find-bmi.cmake

@@ -0,0 +1,27 @@
+function (check_for_bmi prefix destination name)
+  set(found 0)
+  foreach (ext IN ITEMS gcm)
+    if (EXISTS "${prefix}/${destination}/${name}.${ext}")
+      set(found 1)
+      break ()
+    endif ()
+  endforeach ()
+
+  if (NOT found)
+    message(SEND_ERROR
+      "Failed to find the ${name} BMI")
+  endif ()
+endfunction ()
+
+function (check_for_interface prefix destination subdir name)
+  set(found 0)
+  if (NOT EXISTS "${prefix}/${destination}/${subdir}/${name}")
+    message(SEND_ERROR
+      "Failed to find the ${name} module interface")
+  endif ()
+endfunction ()
+
+function (report_dirs prefix destination)
+  message("prefix: ${prefix}")
+  message("destination: ${destination}")
+endfunction ()

Tests/RunCMake/CXXModules/examples/install-bmi-and-interfaces-stderr.txt

@@ -0,0 +1,9 @@
+CMake Warning \(dev\) at CMakeLists.txt:7 \(target_sources\):
+  CMake's C\+\+ module support is experimental.  It is meant only for
+  experimentation and feedback to CMake developers.
+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.

Tests/RunCMake/CXXModules/examples/install-bmi-and-interfaces/CMakeLists.txt

@@ -0,0 +1,27 @@
+cmake_minimum_required(VERSION 3.24)
+project(cxx_modules_install_bmi_and_interfaces CXX)
+
+include("${CMAKE_SOURCE_DIR}/../cxx-modules-rules.cmake")
+
+add_library(install_bmi_and_interfaces STATIC)
+target_sources(install_bmi_and_interfaces
+  PUBLIC
+    FILE_SET CXX_MODULES
+      BASE_DIRS
+        "${CMAKE_CURRENT_SOURCE_DIR}"
+      FILES
+        importable.cxx)
+target_compile_features(install_bmi_and_interfaces PUBLIC cxx_std_20)
+
+install(TARGETS install_bmi_and_interfaces
+  ARCHIVE DESTINATION "lib"
+  CXX_MODULES_BMI DESTINATION "lib/cxx/bmi"
+  FILE_SET CXX_MODULES DESTINATION "lib/cxx/miu")
+
+add_test(NAME check-for-bmi
+  COMMAND
+    "${CMAKE_COMMAND}"
+      "-Dprefix=${CMAKE_INSTALL_PREFIX}"
+      "-Dbmi_destination=lib/cxx/bmi"
+      "-Dfs_destination=lib/cxx/miu"
+      -P "${CMAKE_CURRENT_SOURCE_DIR}/check-for-bmi.cmake")

Tests/RunCMake/CXXModules/examples/install-bmi-and-interfaces/check-for-bmi.cmake

@@ -0,0 +1,7 @@
+include("${CMAKE_CURRENT_LIST_DIR}/../cxx-modules-find-bmi.cmake")
+
+report_dirs("${prefix}" "${bmi_destination}")
+check_for_bmi("${prefix}" "${bmi_destination}" importable)
+
+report_dirs("${prefix}" "${fs_destination}")
+check_for_interface("${prefix}" "${fs_destination}" "" importable.cxx)

Tests/RunCMake/CXXModules/examples/install-bmi-and-interfaces/importable.cxx

@@ -0,0 +1,6 @@
+export module importable;
+
+export int from_import()
+{
+  return 0;
+}

Tests/RunCMake/CXXModules/examples/install-bmi-stderr.txt

@@ -0,0 +1,9 @@
+CMake Warning \(dev\) at CMakeLists.txt:7 \(target_sources\):
+  CMake's C\+\+ module support is experimental.  It is meant only for
+  experimentation and feedback to CMake developers.
+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.

Tests/RunCMake/CXXModules/examples/install-bmi/CMakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.24)
+project(cxx_modules_install_bmi CXX)
+
+include("${CMAKE_SOURCE_DIR}/../cxx-modules-rules.cmake")
+
+add_library(install_bmi STATIC)
+target_sources(install_bmi
+  PUBLIC
+    FILE_SET CXX_MODULES
+      BASE_DIRS
+        "${CMAKE_CURRENT_SOURCE_DIR}"
+      FILES
+        importable.cxx)
+target_compile_features(install_bmi PUBLIC cxx_std_20)
+
+install(TARGETS install_bmi
+  ARCHIVE DESTINATION "lib"
+  CXX_MODULES_BMI DESTINATION "lib/cxx/bmi")
+
+add_test(NAME check-for-bmi
+  COMMAND
+    "${CMAKE_COMMAND}"
+      "-Dprefix=${CMAKE_INSTALL_PREFIX}"
+      "-Ddestination=lib/cxx/bmi"
+      -P "${CMAKE_CURRENT_SOURCE_DIR}/check-for-bmi.cmake")

Tests/RunCMake/CXXModules/examples/install-bmi/check-for-bmi.cmake

@@ -0,0 +1,4 @@
+include("${CMAKE_CURRENT_LIST_DIR}/../cxx-modules-find-bmi.cmake")
+
+report_dirs("${prefix}" "${destination}")
+check_for_bmi("${prefix}" "${destination}" importable)

Tests/RunCMake/CXXModules/examples/install-bmi/importable.cxx

@@ -0,0 +1,6 @@
+export module importable;
+
+export int from_import()
+{
+  return 0;
+}