Merge pull request #161 from stilllman/cmake-alias-target

[cmake] Define alias ghcFilesystem::ghc_filesystem unconditionally

CMakeLists.txt

@@ -40,6 +40,7 @@ message(STATUS "Compiler ID: ${CMAKE_CXX_COMPILER_ID}")
 message(STATUS "CMAKE_CXX_COMPILE_FEATURES: ${CMAKE_CXX_COMPILE_FEATURES}")
 
 add_library(ghc_filesystem INTERFACE)
+add_library(ghcFilesystem::ghc_filesystem ALIAS ghc_filesystem)
 target_include_directories(ghc_filesystem INTERFACE
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
     $<INSTALL_INTERFACE:include>)
@@ -84,5 +85,4 @@ if(GHC_FILESYSTEM_WITH_INSTALL)
             "${PROJECT_BINARY_DIR}/cmake/ghc_filesystem-config-version.cmake"
         DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/ghc_filesystem"
     )
-    add_library(ghcFilesystem::ghc_filesystem ALIAS ghc_filesystem)
 endif()