cmake: Changes in the build system

Changes in this commit involve removing some existing parts of the main
CMake file and enabling the building of examples from the main CMake.

Signed-off-by: Tomasz Leman <tomasz.leman@outlook.com>

CMakeLists.txt

@@ -1,43 +1,22 @@
 cmake_minimum_required(VERSION 3.8)
 project(clipp
-  VERSION 1.2.3
-  LANGUAGES CXX)
-
-include(GNUInstallDirs)
-set(CMAKE_VERBOSE_MAKEFILE ON)
-
-message(STATUS "CMAKE_INSTALL_PREFIX: ${CMAKE_INSTALL_PREFIX}")
-add_library(${PROJECT_NAME} INTERFACE)
-add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
-target_compile_features(${PROJECT_NAME} INTERFACE cxx_std_11)
-target_include_directories(${PROJECT_NAME} INTERFACE
-  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-  $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
-)
-
-set(CONFIG_VERSION_FILE ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake)
-include(CMakePackageConfigHelpers)
-write_basic_package_version_file(
-  ${CONFIG_VERSION_FILE} COMPATIBILITY AnyNewerVersion
-)
-
-install(DIRECTORY include/
-  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-  FILES_MATCHING PATTERN "*.h"
-)
-install(TARGETS ${PROJECT_NAME}
-  EXPORT ${PROJECT_NAME}-config
-)
-install(EXPORT ${PROJECT_NAME}-config
-  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}
-  NAMESPACE ${PROJECT_NAME}::
-)
-install(FILES ${CONFIG_VERSION_FILE}
-  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}
-)
-
-option(BUILD_TESTING "Do not build tests by default" OFF)
-include(CTest)
-if(BUILD_TESTING AND ${CMAKE_SOURCE_DIR} STREQUAL ${PROJECT_SOURCE_DIR})
-  add_subdirectory(test)
+	VERSION 1.2.3
+	LANGUAGES CXX)
+
+if (NOT CMAKE_BUILD_TYPE)
+	set(CMAKE_BUILD_TYPE Debug)
 endif()
+
+message(STATUS "CMAKE_BUILD_TYPE: ${CMAKE_BUILD_TYPE}")
+
+message(STATUS "CMAKE_CXX_COMPILER_ID: ${CMAKE_CXX_COMPILER_ID}")
+
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+include_directories(include)
+
+add_subdirectory(examples)
+
+enable_testing()
+add_subdirectory(test)
+

test/CMakeLists.txt

@@ -1,16 +1,16 @@
 if (NOT CMAKE_BUILD_TYPE)
-  set(CMAKE_BUILD_TYPE Debug)
+	set(CMAKE_BUILD_TYPE Debug)
 endif()
 message(STATUS "CMAKE_BUILD_TYPE: ${CMAKE_BUILD_TYPE}")
 
 message(STATUS "CMAKE_CXX_COMPILER_ID: ${CMAKE_CXX_COMPILER_ID}")
 if("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-  add_compile_options(-stdlib=libc++)
+	add_compile_options(-stdlib=libc++)
 else()
-  add_compile_options(-Wlogical-op)
-  add_compile_options(-Wnoexcept)
-  add_compile_options(-Wstrict-null-sentinel)
-  add_compile_options(-Wuseless-cast)
+	add_compile_options(-Wlogical-op)
+	add_compile_options(-Wnoexcept)
+	add_compile_options(-Wstrict-null-sentinel)
+	add_compile_options(-Wuseless-cast)
 endif()
 add_compile_options(-Wall -Wextra -Wpedantic)
 add_compile_options(-Wcast-align -Wcast-qual)
@@ -30,14 +30,17 @@ add_compile_options(-Wstrict-overflow=5)
 add_compile_options(-Wswitch-default)
 add_compile_options(-Wundef)
 
+add_custom_target(all_tests)
+
 aux_source_directory(${CMAKE_CURRENT_SOURCE_DIR} source_files)
 foreach(src IN LISTS source_files)
-  get_filename_component(name_we ${src} NAME_WE)
-  add_executable(test-${name_we} ${src})
-  target_link_libraries(test-${name_we} ${PROJECT_NAME}::${PROJECT_NAME})
-  set_target_properties(test-${name_we} PROPERTIES
-    CXX_STANDARD_REQUIRED ON
-    CXX_EXTENSIONS OFF
-  )
-  add_test(NAME ${name_we} COMMAND $<TARGET_FILE:test-${name_we}>)
+	get_filename_component(name_we ${src} NAME_WE)
+	add_executable(test-${name_we} ${src})
+	set_target_properties(test-${name_we} PROPERTIES
+		CXX_STANDARD_REQUIRED ON
+		CXX_EXTENSIONS OFF
+	)
+	add_test(NAME ${name_we} COMMAND $<TARGET_FILE:test-${name_we}>)
+	add_dependencies(all_tests test-${name_we})
 endforeach()
+