fix ccache handling

cmake/StandardSettings.cmake

@@ -2,58 +2,75 @@
 # Project settings
 #
 
-option(${PROJECT_NAME}_BUILD_EXECUTABLE "Build the project as an executable, rather than a library." OFF)
-option(${PROJECT_NAME}_BUILD_HEADERS_ONLY "Build the project as a header-only library." OFF)
-option(${PROJECT_NAME}_USE_ALT_NAMES "Use alternative names for the project, such as naming the include directory all lowercase." ON)
+option(${PROJECT_NAME}_BUILD_EXECUTABLE
+       "Build the project as an executable, rather than a library." OFF)
+option(${PROJECT_NAME}_BUILD_HEADERS_ONLY
+       "Build the project as a header-only library." OFF)
+option(
+  ${PROJECT_NAME}_USE_ALT_NAMES
+  "Use alternative names for the project, such as naming the include directory all lowercase."
+  ON)
 
 #
 # Compiler options
 #
 
-option(${PROJECT_NAME}_WARNINGS_AS_ERRORS "Treat compiler warnings as errors." OFF)
+option(${PROJECT_NAME}_WARNINGS_AS_ERRORS "Treat compiler warnings as errors."
+       OFF)
 
 #
 # Package managers
 #
 # Currently supporting: Conan, Vcpkg, CPM
 
-option(${PROJECT_NAME}_ENABLE_CONAN "Enable the Conan package manager for this project." OFF)
-option(${PROJECT_NAME}_ENABLE_VCPKG "Enable the Vcpkg package manager for this project." OFF)
-option(${PROJECT_NAME}_ENABLE_CPM "Enable the CMake's missing package manager for this project." OFF)
+option(${PROJECT_NAME}_ENABLE_CONAN
+       "Enable the Conan package manager for this project." OFF)
+option(${PROJECT_NAME}_ENABLE_VCPKG
+       "Enable the Vcpkg package manager for this project." OFF)
+option(${PROJECT_NAME}_ENABLE_CPM
+       "Enable the CMake's missing package manager for this project." OFF)
 
-option(${PROJECT_NAME}_USE_HEADER_ONLY_FMTLIB "Use Header only fmtlib/fmt . With conan, automatically OFF" ON)
+option(${PROJECT_NAME}_USE_HEADER_ONLY_FMTLIB
+       "Use Header only fmtlib/fmt . With conan, automatically OFF" ON)
 
 #
 # Unit testing
 #
 # Currently supporting: GoogleTest, Catch2.
 
-option(${PROJECT_NAME}_ENABLE_UNIT_TESTING "Enable unit tests for the projects (from the `test` subfolder)." OFF)
+option(${PROJECT_NAME}_ENABLE_UNIT_TESTING
+       "Enable unit tests for the projects (from the `test` subfolder)." OFF)
 
-# option(${PROJECT_NAME}_USE_GTEST "Use the GoogleTest project for creating unit tests." ON)
-# option(${PROJECT_NAME}_USE_GOOGLE_MOCK "Use the GoogleMock project for extending the unit tests." OFF)
+# option(${PROJECT_NAME}_USE_GTEST "Use the GoogleTest project for creating unit
+# tests." ON) option(${PROJECT_NAME}_USE_GOOGLE_MOCK "Use the GoogleMock project
+# for extending the unit tests." OFF)
 
-# option(${PROJECT_NAME}_USE_CATCH2 "Use the Catch2 project for creating unit tests." OFF)
+# option(${PROJECT_NAME}_USE_CATCH2 "Use the Catch2 project for creating unit
+# tests." OFF)
 
 #
 # Static analyzers
 #
 # Currently supporting: Clang-Tidy, Cppcheck.
 
-option(${PROJECT_NAME}_ENABLE_CLANG_TIDY "Enable static analysis with Clang-Tidy." OFF)
-option(${PROJECT_NAME}_ENABLE_CPPCHECK "Enable static analysis with Cppcheck." OFF)
+option(${PROJECT_NAME}_ENABLE_CLANG_TIDY
+       "Enable static analysis with Clang-Tidy." OFF)
+option(${PROJECT_NAME}_ENABLE_CPPCHECK "Enable static analysis with Cppcheck."
+       OFF)
 
 #
 # Code coverage
 #
 
-option(${PROJECT_NAME}_ENABLE_CODE_COVERAGE "Enable code coverage through GCC." OFF)
+option(${PROJECT_NAME}_ENABLE_CODE_COVERAGE "Enable code coverage through GCC."
+       OFF)
 
 #
 # Doxygen
 #
 
-option(${PROJECT_NAME}_ENABLE_DOXYGEN "Enable Doxygen documentation builds of source." OFF)
+option(${PROJECT_NAME}_ENABLE_DOXYGEN
+       "Enable Doxygen documentation builds of source." OFF)
 
 #
 # Miscelanious options
@@ -62,8 +79,12 @@ option(${PROJECT_NAME}_ENABLE_DOXYGEN "Enable Doxygen documentation builds of so
 # Generate compile_commands.json for clang based tools
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
-option(${PROJECT_NAME}_VERBOSE_OUTPUT "Enable verbose output, allowing for a better understanding of each step taken." ON)
-option(${PROJECT_NAME}_GENERATE_EXPORT_HEADER "Create a `project_export.h` file containing all exported symbols." OFF)
+option(
+  ${PROJECT_NAME}_VERBOSE_OUTPUT
+  "Enable verbose output, allowing for a better understanding of each step taken."
+  ON)
+option(${PROJECT_NAME}_GENERATE_EXPORT_HEADER
+       "Create a `project_export.h` file containing all exported symbols." OFF)
 
 # Export all symbols when building a shared library
 if(BUILD_SHARED_LIBS)
@@ -72,7 +93,9 @@ if(BUILD_SHARED_LIBS)
   set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)
 endif()
 
-option(${PROJECT_NAME}_ENABLE_LTO "Enable Interprocedural Optimization, aka Link Time Optimization (LTO)." OFF)
+option(${PROJECT_NAME}_ENABLE_LTO
+       "Enable Interprocedural Optimization, aka Link Time Optimization (LTO)."
+       OFF)
 if(${PROJECT_NAME}_ENABLE_LTO)
   include(CheckIPOSupported)
   check_ipo_supported(RESULT result OUTPUT output)
@@ -83,16 +106,19 @@ if(${PROJECT_NAME}_ENABLE_LTO)
   endif()
 endif()
 
-
-option(${PROJECT_NAME}_ENABLE_CCACHE "Enable the usage of Ccache, in order to speed up rebuild times." ON)
-find_program(CCACHE_FOUND ccache)
-if(CCACHE_FOUND)
-  set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
-  set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
+option(${PROJECT_NAME}_ENABLE_CCACHE
+       "Enable the usage of Ccache, in order to speed up rebuild times." OFF)
+if(${${PROJECT_NAME}_ENABLE_CCACHE})
+  find_program(CCACHE_FOUND ccache)
+  if(CCACHE_FOUND)
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
+  endif()
 endif()
 
-option(${PROJECT_NAME}_ENABLE_ASAN "Enable Address Sanitize to detect memory error." OFF)
+option(${PROJECT_NAME}_ENABLE_ASAN
+       "Enable Address Sanitize to detect memory error." OFF)
 if(${PROJECT_NAME}_ENABLE_ASAN)
-    add_compile_options(-fsanitize=address)
-    add_link_options(-fsanitize=address)
+  add_compile_options(-fsanitize=address)
+  add_link_options(-fsanitize=address)
 endif()