add cmake installation support (#82)

Adds cmake installation support

CMakeLists.txt

@@ -0,0 +1,48 @@
+# Version 3.2 is needed to be able to have support of target_compile_features for AppleClang
+cmake_minimum_required(VERSION 3.2.0 FATAL_ERROR)
+
+# Sets the name of the project, and stores it in the variable PROJECT_NAME. When called from the top-level CMakeLists.txt also stores the project name in the variable CMAKE_PROJECT_NAME.
+project(Mach7)
+
+# Adds a subdirectory to the build. The source_dir specifies the directory in which the source CMakeLists.txt and code files are located.
+project(Mach7)
+
+add_subdirectory(code/test)
+
+# Define the library target
+add_library(Mach7 INTERFACE)
+add_library(Mach7::Mach7 ALIAS Mach7)
+
+install(TARGETS Mach7
+    EXPORT Mach7Targets
+    LIBRARY DESTINATION lib COMPONENT Runtime
+    ARCHIVE DESTINATION lib COMPONENT Development
+    RUNTIME DESTINATION bin COMPONENT Runtime
+    PUBLIC_HEADER DESTINATION include COMPONENT Development
+    BUNDLE DESTINATION bin COMPONENT Runtime
+)
+
+include(CMakePackageConfigHelpers)
+configure_package_config_file(
+    "${PROJECT_SOURCE_DIR}/cmake/Mach7Config.cmake.in"
+    "${PROJECT_BINARY_DIR}/Mach7Config.cmake"
+    INSTALL_DESTINATION lib/cmake/Mach7
+)
+
+install(EXPORT Mach7Targets DESTINATION lib/cmake/Mach7)
+install(FILES
+    "${PROJECT_BINARY_DIR}/Mach7Config.cmake"
+    DESTINATION lib/cmake/Mach7)
+
+
+# for linux: copy header files to /usr/local/ by default
+# for windows: copy header fiels to c:/Program Files by default
+install(
+    DIRECTORY ${CMAKE_SOURCE_DIR}/code/mach7/
+    DESTINATION include/mach7)
+install(
+    DIRECTORY ${CMAKE_SOURCE_DIR}/code/xtl/
+    DESTINATION include/xtl)
+install(
+    DIRECTORY ${CMAKE_SOURCE_DIR}/code/cppft/
+    DESTINATION include/cppft)

README.md

@@ -161,13 +161,20 @@ on the library were built with.
  [CMake](https://cmake.org/) support is the most recent and is still very experimental at this point. To
  build with cmake, perform the following commands from within Mach7 folder:
 
-    cd code/test
-    mkdir build
-    cd build
-    cmake ..
-    cmake --build .
-
- Version 3.2 is needed in order to be able to have support of target_compile_features for AppleClang
+    cmake -H. -Bbuild 
+    cmake --build build --target install
+    
+Note: this requires administrative privileges under all systems, if you don't like this, try commands below:
+
+    cmake -H. -Bbuild -DCMAKE_INSTALL_PREFIX=/wherever/doesn't/require/administrative/priviege
+    cmake --build build --target install
+    
+But please make sure msvc/clang/gcc is able to find the path your provide above when
+including Mach7's headers in your own project:
+
+- MSVC: https://stackoverflow.com/questions/335408/where-does-visual-studio-look-for-c-header-files
+- Gcc/Clang: -I
+- CMake: https://stackoverflow.com/questions/13703647/how-to-properly-add-include-directories-with-cmake 
 
 #### Using Makefiles for GCC (4.4 or later) or Clang (3.3 or later)
  

cmake/Mach7Config.cmake.in

@@ -0,0 +1,5 @@
+# https://stackoverflow.com/questions/47718485/install-and-export-interface-only-library-cmake
+@PACKAGE_INIT@
+
+include("${CMAKE_CURRENT_LIST_DIR}/Mach7Targets.cmake")
+check_required_components("@PROJECT_NAME@")

code/test/CMakeLists.txt

@@ -7,7 +7,9 @@ set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 # Add preprocessor definition to disable internal XTL messages
 add_definitions(-DXTL_MESSAGE_ENABLED=0)
 
+# Sets the name of the project, and stores it in the variable PROJECT_NAME. When called from the top-level CMakeLists.txt also stores the project name in the variable CMAKE_PROJECT_NAME.
 project(Tests)
 
+# Adds a subdirectory to the build. The source_dir specifies the directory in which the source CMakeLists.txt and code files are located.
 add_subdirectory(unit)
 add_subdirectory(time)