CMake: harmonizes options

CMakeLists.txt

@@ -17,9 +17,11 @@ if(MSVC)
 else()
   set(LIBCPUID_SHARED ON)
 endif()
-option(BUILD_SHARED_LIBS "Build shared lib" ${LIBCPUID_SHARED})
-option(LIBCPUID_DRIVERS "Enable kernel drivers" ON)
-option(LIBCPUID_TESTS "Enable building tests" OFF)
+
+# Options
+option(BUILD_SHARED_LIBS "Build building shared libraries" ${LIBCPUID_SHARED})
+option(LIBCPUID_BUILD_DRIVERS "Enable building kernel drivers" ON)
+option(LIBCPUID_ENABLE_TESTS "Enable tests targets" OFF)
 
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_C_STANDARD 99)
@@ -65,9 +67,9 @@ endif(UNIX)
 # Include subdirectories
 add_subdirectory(libcpuid)
 add_subdirectory(cpuid_tool)
-if(LIBCPUID_DRIVERS)
+if(LIBCPUID_BUILD_DRIVERS)
   add_subdirectory(drivers)
-endif()
-if(LIBCPUID_TESTS)
+endif(LIBCPUID_BUILD_DRIVERS)
+if(LIBCPUID_ENABLE_TESTS)
   add_subdirectory(tests)
-endif()
+endif(LIBCPUID_ENABLE_TESTS)

Readme.md

@@ -65,9 +65,17 @@ sources.
 
 ##### By using CMake
 
+CMake options for libcpuid (use `cmake -LH` to list all options):
+- `LIBCPUID_ENABLE_DOCS`: enable building documentation by using Doxyen (**ON** by default)
+- `LIBCPUID_ENABLE_TESTS`: enable tests targets, like `test-fast`, `test-old` and `fix-tests` (**OFF** by default)
+- `LIBCPUID_BUILD_DEPRECATED`: build support of deprecated attributes (**ON** by default to guarantee backward compatibility)
+- `LIBCPUID_BUILD_DRIVERS`: enable building kernel drivers (**ON** by default)
+- `LIBCPUID_DRIVER_DEBUG`: enable debug mode flr kernel drivers (**OFF** by default)
+- `LIBCPUID_DRIVER_ARM_LINUX_DKMS`: use DKMS for CPUID Linux kernel module for ARM (**ON** by default), switch off to build the kernel module in the `build` directory
+
 Basic example to build and install libcpuid by using CMake:
 ```shell
-cmake -S . -B build -DCMAKE_BUILD_TYPE=RelWithDebInfo
+cmake -S . -B build -DCMAKE_BUILD_TYPE=RelWithDebInfo -DLIBCPUID_ENABLE_TESTS=ON
 cmake --build build
 cmake --install build # may need administrative privileges, install under /usr/local by default
 ```

drivers/arm/CMakeLists.txt

@@ -1,4 +1,6 @@
-option(LIBCPUID_DRIVER_DEBUG "Debug kernel module" OFF)
+# Options
+option(LIBCPUID_DRIVER_DEBUG "Debug kernel driver" OFF)
+
 if(LIBCPUID_DRIVER_DEBUG)
   add_definitions(-DLIBCPUID_DRIVER_DEBUG)
 endif(LIBCPUID_DRIVER_DEBUG)

drivers/arm/linux/CMakeLists.txt

@@ -1,6 +1,8 @@
-set(DRIVER_NAME "cpuid")
+# Options
 option(LIBCPUID_DRIVER_ARM_LINUX_DKMS "Use DKMS for CPUID kernel module for ARM" ON)
 
+set(DRIVER_NAME "cpuid")
+
 if(LIBCPUID_DRIVER_ARM_LINUX_DKMS)
   message(STATUS "Deploying DKMS configuration for CPUID kernel module...")
   set(LIBCPUID_SRC_DIR "/usr/src/${CMAKE_PROJECT_NAME}-${PROJECT_VERSION}")

libcpuid/CMakeLists.txt

@@ -1,3 +1,7 @@
+# Options
+option(LIBCPUID_BUILD_DEPRECATED "Build support of deprecated attributes" ON)
+option(LIBCPUID_ENABLE_DOCS "Enable building documentation" ON)
+
 set(cpuid_sources
     cpuid_main.c
     recog_amd.c
@@ -21,11 +25,10 @@ if("${MSVC_CXX_ARCHITECTURE_ID}" MATCHES "x64")
   list(APPEND cpuid_sources masm-x64.asm)
 endif()
 
-option(SUPPORT_DEPRECATED "Build support of deprecated attributes" ON)
-if(NOT SUPPORT_DEPRECATED)
+if(NOT LIBCPUID_BUILD_DEPRECATED)
   message(AUTHOR_WARNING "Deprecated attributes will not be available, the library will be not backward compatible")
   add_compile_definitions(LIBCPUID_DISABLE_DEPRECATED)
-endif(NOT SUPPORT_DEPRECATED)
+endif(NOT LIBCPUID_BUILD_DEPRECATED)
 
 add_library(cpuid ${cpuid_sources})
 set_property(TARGET cpuid PROPERTY WINDOWS_EXPORT_ALL_SYMBOLS ON)
@@ -38,9 +41,9 @@ set_target_properties(cpuid PROPERTIES SOVERSION "${LIBCPUID_CURRENT}")
 set_target_properties(cpuid PROPERTIES PUBLIC_HEADER "libcpuid.h;libcpuid_types.h;libcpuid_constants.h")
 
 # Documentation
+if(LIBCPUID_ENABLE_DOCS)
   find_package(Doxygen)
-option(ENABLE_DOCS "Enable building documentation." ON)
-if(DOXYGEN_FOUND AND ENABLE_DOCS)
+  if(DOXYGEN_FOUND)
     set(top_srcdir ${PROJECT_SOURCE_DIR})
     configure_file(Doxyfile.in Doxyfile ESCAPE_QUOTES)
     add_custom_target(
@@ -58,13 +61,14 @@ if(DOXYGEN_FOUND AND ENABLE_DOCS)
         PATTERN "libcpuid.3"
         PATTERN "cpuid_tool.3")
     endif(UNIX)
-else()
+  else(DOXYGEN_FOUND)
     add_custom_target(
       docs
       echo
-    "Doxygen was not installed when CMake was run or ENABLE_DOCS was OFF. Check that Doxygen is installed and rerun `cmake .`"
+      "Doxygen was not installed when CMake was run. Check that Doxygen is installed and rerun `cmake .`"
       VERBATIM)
-endif()
+  endif(DOXYGEN_FOUND)
+endif(LIBCPUID_ENABLE_DOCS)
 
 # Configuration
 set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated")