Modernise CMake

* Use `GNUInstallDirs` in order to respect GNU conventions.
  This is especially important for multi-arch/multi-lib setups.
* Specify position independent mode building properly, without
  using the historic hack of adding `-fPIC` as a definition.
  This makes the build system more portable.
* Only detect C++ (and not C) to slightly speed up configuring.
* Specify C++11 mode using modern CMake idioms.
* Fix some whitespace issues.

gtests/CMakeLists.txt

@@ -1,55 +1,55 @@
 if (TARGET gmock)
-  message(STATUS "Google Mock found - building tests")
+    message(STATUS "Google Mock found - building tests")
 
-  set(TEST_SOURCES
-    # Framework related source files
-    ${CMAKE_CURRENT_SOURCE_DIR}/Initializer.h
-    ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/Settings.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/Settings.h
-    ${CMAKE_CURRENT_SOURCE_DIR}/TestFixture.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/TestFixture.h
+    set(TEST_SOURCES
+        # Framework related source files
+        ${CMAKE_CURRENT_SOURCE_DIR}/Initializer.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/Settings.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/Settings.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/TestFixture.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/TestFixture.h
 
-    # Test related source files
-    ${CMAKE_CURRENT_SOURCE_DIR}/AST.FromFile.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/BuiltInResource.FromFile.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/Config.FromFile.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/HexFloat.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/Hlsl.FromFile.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/Link.FromFile.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/Link.FromFile.Vk.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/Pp.FromFile.cpp
-    ${CMAKE_CURRENT_SOURCE_DIR}/Spv.FromFile.cpp
-    # -- Remapper tests
-    ${CMAKE_CURRENT_SOURCE_DIR}/Remap.FromFile.cpp
-  )
+        # Test related source files
+        ${CMAKE_CURRENT_SOURCE_DIR}/AST.FromFile.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/BuiltInResource.FromFile.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/Config.FromFile.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/HexFloat.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/Hlsl.FromFile.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/Link.FromFile.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/Link.FromFile.Vk.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/Pp.FromFile.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/Spv.FromFile.cpp
 
-  add_executable(glslangtests ${TEST_SOURCES})
-  set_property(TARGET glslangtests PROPERTY FOLDER tests)
-  glslang_set_link_args(glslangtests)
-  install(TARGETS glslangtests
-        RUNTIME DESTINATION bin)
+        # -- Remapper tests
+        ${CMAKE_CURRENT_SOURCE_DIR}/Remap.FromFile.cpp)
 
-  set(GLSLANG_TEST_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/../Test")
-  # Supply a default test root directory, so that manual testing
-  # doesn't have to specify the --test-root option in the normal
-  # case that you want to use the tests from the same source tree.
-  target_compile_definitions(glslangtests
-    PRIVATE GLSLANG_TEST_DIRECTORY="${GLSLANG_TEST_DIRECTORY}")
-  target_include_directories(glslangtests PRIVATE
-    ${CMAKE_CURRENT_SOURCE_DIR}
-    ${PROJECT_SOURCE_DIR}
-    ${gmock_SOURCE_DIR}/include
-    ${gtest_SOURCE_DIR}/include)
+    add_executable(glslangtests ${TEST_SOURCES})
+    set_property(TARGET glslangtests PROPERTY FOLDER tests)
+    glslang_set_link_args(glslangtests)
+    install(TARGETS glslangtests
+            RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
 
-  set(LIBRARIES
-      SPVRemapper glslang OSDependent OGLCompiler glslang
-      SPIRV glslang-default-resource-limits)
-  if(ENABLE_HLSL)
-    set(LIBRARIES ${LIBRARIES} HLSL)
-  endif(ENABLE_HLSL)
-  target_link_libraries(glslangtests PRIVATE ${LIBRARIES} gmock)
+    set(GLSLANG_TEST_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/../Test")
+    # Supply a default test root directory, so that manual testing
+    # doesn't have to specify the --test-root option in the normal
+    # case that you want to use the tests from the same source tree.
+    target_compile_definitions(glslangtests
+                               PRIVATE GLSLANG_TEST_DIRECTORY="${GLSLANG_TEST_DIRECTORY}")
+    target_include_directories(glslangtests PRIVATE
+                               ${CMAKE_CURRENT_SOURCE_DIR}
+                               ${PROJECT_SOURCE_DIR}
+                               ${gmock_SOURCE_DIR}/include
+                               ${gtest_SOURCE_DIR}/include)
 
-  add_test(NAME glslang-gtests
-    COMMAND glslangtests --test-root "${GLSLANG_TEST_DIRECTORY}")
+    set(LIBRARIES
+        SPVRemapper glslang OSDependent OGLCompiler glslang
+        SPIRV glslang-default-resource-limits)
+    if(ENABLE_HLSL)
+        set(LIBRARIES ${LIBRARIES} HLSL)
+    endif(ENABLE_HLSL)
+    target_link_libraries(glslangtests PRIVATE ${LIBRARIES} gmock)
+
+    add_test(NAME glslang-gtests
+             COMMAND glslangtests --test-root "${GLSLANG_TEST_DIRECTORY}")
 endif()