Using cmake to generate a dynamic library

cpp/CMakeLists.txt

@@ -0,0 +1,87 @@
+#
+# Makefile for QR Code generator (C++)
+#
+# Copyright (c) Project Nayuki. (MIT License)
+# https://www.nayuki.io/page/qr-code-generator-library
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy of
+# this software and associated documentation files (the "Software"), to deal in
+# the Software without restriction, including without limitation the rights to
+# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+# the Software, and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+# - The above copyright notice and this permission notice shall be included in
+#   all copies or substantial portions of the Software.
+# - The Software is provided "as is", without warranty of any kind, express or
+#   implied, including but not limited to the warranties of merchantability,
+#   fitness for a particular purpose and noninfringement. In no event shall the
+#   authors or copyright holders be liable for any claim, damages or other
+#   liability, whether in an action of contract, tort or otherwise, arising from,
+#   out of or in connection with the Software or the use or other dealings in the
+#   Software.
+#
+cmake_minimum_required(VERSION 3.0)
+
+project(QrCode VERSION 1.0.0)
+
+add_definitions("-Wall")
+add_definitions("-Wextra")
+add_definitions("-Werror")
+#add_definitions("-fsanitize=undefined")
+
+set(${PROJECT_NAME}_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/${PROJECT_NAME}")
+
+include_directories(${${PROJECT_NAME}_INCLUDE_DIR})
+
+file(GLOB ${PROJECT_NAME}_PUBLIC_HEADERS "${${PROJECT_NAME}_INCLUDE_DIR}/*.hpp")
+file(GLOB ${PROJECT_NAME}_SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp")
+
+add_library(${PROJECT_NAME} SHARED ${${PROJECT_NAME}_SOURCES})
+
+set_target_properties(${PROJECT_NAME} PROPERTIES CXX_STANDARD 11
+                                                 CXX_STANDARD_REQUIRED YES
+                                                 CXX_EXTENSIONS NO)
+
+set_target_properties(${PROJECT_NAME} PROPERTIES PUBLIC_HEADER "${${PROJECT_NAME}_PUBLIC_HEADERS}")
+set_target_properties(${PROJECT_NAME} PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION ${PROJECT_VERSION_MAJOR})
+
+# Installation options
+include(GNUInstallDirs)
+set(${PROJECT_NAME}_INSTALL_LIB_DIR ${CMAKE_INSTALL_LIBDIR} CACHE PATH "Installation directory for libraries")
+set(${PROJECT_NAME}_INSTALL_INCLUDE_DIR ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME} CACHE PATH "Installation directory for header files")
+set(${PROJECT_NAME}_INSTALL_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME} CACHE PATH "Installation directory for CMake files")
+
+# Get absolute path where to install files
+foreach(p LIB BIN INCLUDE CMAKE)
+    set(var ${PROJECT_NAME}_INSTALL_${p}_DIR)
+    if(NOT IS_ABSOLUTE "${${var}}")
+        set(${var} "${CMAKE_INSTALL_PREFIX}/${${var}}")
+    endif()
+endforeach()
+
+# Exporting target
+export(TARGETS ${PROJECT_NAME} FILE "${PROJECT_BINARY_DIR}/${PROJECT_NAME}.cmake")
+export(PACKAGE ${PROJECT_NAME})
+
+file(RELATIVE_PATH ${PROJECT_NAME}_REL_INCLUDE_DIR "${${PROJECT_NAME}_INSTALL_CMAKE_DIR}" "${${PROJECT_NAME}_INSTALL_INCLUDE_DIR}")
+
+## configure for build tree
+set(CONF_INCLUDE_DIRS "${PROJECT_SOURCE_DIR}" "${PROJECT_BINARY_DIR}")
+configure_file(${PROJECT_NAME}Config.cmake.in "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake" @ONLY)
+
+## configure for install tree
+set(CONF_INCLUDE_DIRS "\${${PROJECT_NAME}_CMAKE_DIR}/${REL_INCLUDE_DIR}")
+configure_file(${PROJECT_NAME}Config.cmake.in "${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/${PROJECT_NAME}Config.cmake" @ONLY)
+
+##  ... for both
+configure_file(${PROJECT_NAME}ConfigVersion.cmake.in  "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake" @ONLY)
+
+install(TARGETS ${PROJECT_NAME}
+        EXPORT ${PROJECT_NAME} DESTINATION "${${PROJECT_NAME}_INSTALL_CMAKE_DIR}" COMPONENT dev
+        LIBRARY DESTINATION "${${PROJECT_NAME}_INSTALL_LIB_DIR}"
+        PUBLIC_HEADER DESTINATION "${${PROJECT_NAME}_INSTALL_INCLUDE_DIR}" COMPONENT dev)
+
+install(FILES
+        "${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/${PROJECT_NAME}Config.cmake"
+        "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
+        DESTINATION "${${PROJECT_NAME}_INSTALL_CMAKE_DIR}" COMPONENT dev)

cpp/Makefile

@@ -32,6 +32,7 @@
 CXXFLAGS += -std=c++11
 # Diagnostics. Adding '-fsanitize=address' is helpful for most versions of Clang and newer versions of GCC.
 CXXFLAGS += -Wall -fsanitize=undefined
+CXXFLAGS += -IQrCode
 # Optimization level
 CXXFLAGS += -O1
 
@@ -62,5 +63,5 @@ clean:
 	rm -f -- $(MAINS)
 
 # Executable files
-%: %.cpp $(LIBSRC:=.cpp) $(LIBSRC:=.hpp)
+%: examples/%.cpp $(addprefix src/,$(LIBSRC:=.cpp)) $(addprefix QrCode/,$(LIBSRC:=.hpp))
-	$(CXX) $(CXXFLAGS) -o $@ $< $(LIBSRC:=.cpp)
+	$(CXX) $(CXXFLAGS) -o $@ $< $(addprefix src/,$(LIBSRC:=.cpp))

cpp/QrCodeConfig.cmake.in

@@ -0,0 +1,14 @@
+# - Config file for the @PROJECT_NAME@ package
+# It defines the following variables
+#  @PROJECT_NAME@_INCLUDE_DIRS - include directories for @PROJECT_NAME@
+#  @PROJECT_NAME@_LIBRARIES    - libraries to link against
+
+# Compute paths
+get_filename_component(@PROJECT_NAME@_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
+set(@PROJECT_NAME@_INCLUDE_DIRS "@CONF_INCLUDE_DIRS@")
+
+# Our library dependencies (contains definitions for IMPORTED targets)
+include("${@PROJECT_NAME@_CMAKE_DIR}/@PROJECT_NAME@Targets.cmake")
+
+# These are IMPORTED targets created by @PROJECT_NAME@Targets.cmake
+set(@PROJECT_NAME@_LIBRARIES "@PROJECT_NAME@")

cpp/QrCodeConfigVersion.cmake.in

@@ -0,0 +1,11 @@
+set(PACKAGE_VERSION "@PROJECT_VERSION@")
+
+# Check whether the requested PACKAGE_FIND_VERSION is compatible
+if("${PACKAGE_VERSION}" VERSION_LESS "${PACKAGE_FIND_VERSION}")
+  set(PACKAGE_VERSION_COMPATIBLE FALSE)
+else()
+  set(PACKAGE_VERSION_COMPATIBLE TRUE)
+  if ("${PACKAGE_VERSION}" VERSION_EQUAL "${PACKAGE_FIND_VERSION}")
+    set(PACKAGE_VERSION_EXACT TRUE)
+  endif()
+endif()