Fix build with CMake (#103)

Author: yurybura

CMakeLists.txt

@@ -10,7 +10,10 @@ project(boost_dll VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX)
 
 option(BOOST_DLL_USE_STD_FS "Use std::filesystem instead of Boost.Filesystem" OFF)
 
+# Base library
+
 add_library(boost_dll_base INTERFACE)
+add_library(Boost::dll_base ALIAS boost_dll_base)
 target_include_directories(boost_dll_base INTERFACE include)
 target_link_libraries(boost_dll_base
   INTERFACE
@@ -25,35 +28,53 @@ target_link_libraries(boost_dll_base
     ${CMAKE_DL_LIBS}
 )
 
+# Library with std::filesystem
 
 add_library(boost_dll_std_fs INTERFACE)
-target_link_libraries(boost_dll_std_fs
-  INTERFACE
-    boost_dll_base
-)
+add_library(Boost::dll_std_fs ALIAS boost_dll_std_fs)
+target_include_directories(boost_dll_std_fs INTERFACE include)
+target_link_libraries(boost_dll_std_fs INTERFACE Boost::dll_base)
 target_compile_definitions(boost_dll_std_fs INTERFACE BOOST_DLL_USE_STD_FS)
 target_compile_features(boost_dll_std_fs INTERFACE cxx_std_17)
 
+# Library with Boost.Filesystem
+
 add_library(boost_dll_boost_fs INTERFACE)
+add_library(Boost::dll_boost_fs ALIAS boost_dll_boost_fs)
+target_include_directories(boost_dll_boost_fs INTERFACE include)
 target_link_libraries(boost_dll_boost_fs
   INTERFACE
-    boost_dll_base
+    Boost::dll_base # Internal dependency
     Boost::filesystem
 )
 
+# Detault library
 
 add_library(boost_dll INTERFACE)
-if(BOOST_DLL_USE_STD_FS)
-  target_link_libraries(boost_dll INTERFACE boost_dll_std_fs)
+add_library(Boost::dll ALIAS boost_dll)
+target_include_directories(boost_dll INTERFACE include)
+if (BOOST_DLL_USE_STD_FS)
+  target_link_libraries(boost_dll INTERFACE Boost::dll_std_fs)
 else()
-  target_link_libraries(boost_dll INTERFACE boost_dll_boost_fs)
+  target_link_libraries(boost_dll INTERFACE Boost::dll_boost_fs)
 endif()
 
-add_library(Boost::dll ALIAS boost_dll)
+if (BOOST_SUPERPROJECT_VERSION AND NOT CMAKE_VERSION VERSION_LESS 3.13)
+  boost_install(
+    TARGETS
+      boost_dll
+      boost_dll_base
+      boost_dll_std_fs
+      boost_dll_boost_fs
+    VERSION
+      "${BOOST_SUPERPROJECT_VERSION}"
+    HEADER_DIRECTORY
+      include
+  )
+endif()
 
 if(BUILD_TESTING AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/test/CMakeLists.txt")
 
   add_subdirectory(test)
 
 endif()
-