[CMake] Add UTF8PROC_NO_INSTALL option (#152)

* [CMake] Add UTF8PROC_NO_INSTALL option

* change to UTF8PROC_INSTALL

CMakeLists.txt

@@ -13,6 +13,8 @@ set(SO_MAJOR 2)
 set(SO_MINOR 2)
 set(SO_PATCH 0)
 
+option(UTF8PROC_INSTALL "Enable installation of utf8proc" On)
+
 add_library (utf8proc
   utf8proc.c
   utf8proc.h
@@ -46,12 +48,14 @@ set_target_properties (utf8proc PROPERTIES
   SOVERSION ${SO_MAJOR}
 )
 
-install(TARGETS utf8proc
+if (UTF8PROC_INSTALL)
+  install(TARGETS utf8proc
     RUNTIME DESTINATION bin
     LIBRARY DESTINATION lib
     ARCHIVE DESTINATION lib)
 
-install(
+  install(
     FILES
       "${PROJECT_SOURCE_DIR}/utf8proc.h"
     DESTINATION include)
+endif()