Changed CMake dirs to current dirs to work with external apps

CMakeLists.txt

@@ -444,19 +444,19 @@ endif()
 ##
 ############################################################################################################################
 
-try_compile( WALBERLA_USE_STD_FILESYSTEM "${CMAKE_BINARY_DIR}" "${CMAKE_SOURCE_DIR}/cmake/TestStdFilesystem.cpp"
+try_compile( WALBERLA_USE_STD_FILESYSTEM "${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/TestStdFilesystem.cpp"
              COMPILE_DEFINITIONS -DWALBERLA_USE_STD_FILESYSTEM ${CMAKE_CXX14_STANDARD_COMPILE_OPTION} )
 if( WALBERLA_USE_STD_FILESYSTEM )
    message( STATUS "Found std::filesystem")
 else()
-   try_compile( WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM "${CMAKE_BINARY_DIR}" "${CMAKE_SOURCE_DIR}/cmake/TestStdFilesystem.cpp"
+   try_compile( WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM "${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/TestStdFilesystem.cpp"
                 COMPILE_DEFINITIONS -DWALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM ${CMAKE_CXX14_STANDARD_COMPILE_OPTION} )
    if( WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM )
       message( STATUS "Found std::experimental::filesystem")
    endif()
    if( NOT WALBERLA_CXX_COMPILER_IS_MSVC AND NOT WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM )
       unset( WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM CACHE )
-      try_compile( WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM "${CMAKE_BINARY_DIR}" "${CMAKE_SOURCE_DIR}/cmake/TestStdFilesystem.cpp"
+      try_compile( WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM "${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/TestStdFilesystem.cpp"
                    COMPILE_DEFINITIONS -DWALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM ${CMAKE_CXX14_STANDARD_COMPILE_OPTION}
                    LINK_LIBRARIES stdc++fs )
       if( WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM )
@@ -466,7 +466,7 @@ else()
    endif()
    if( NOT WALBERLA_CXX_COMPILER_IS_MSVC AND NOT WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM )
       unset( WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM CACHE )
-      try_compile( WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM "${CMAKE_BINARY_DIR}" "${CMAKE_SOURCE_DIR}/cmake/TestStdFilesystem.cpp"
+      try_compile( WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM "${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/TestStdFilesystem.cpp"
                    COMPILE_DEFINITIONS -DWALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM ${CMAKE_CXX14_STANDARD_COMPILE_OPTION}
                    LINK_LIBRARIES c++experimental )
       if( WALBERLA_USE_STD_EXPERIMENTAL_FILESYSTEM )
@@ -476,24 +476,24 @@ else()
    endif()
 endif()
 
-try_compile( WALBERLA_USE_STD_ANY "${CMAKE_BINARY_DIR}" "${CMAKE_SOURCE_DIR}/cmake/TestStdAny.cpp"
+try_compile( WALBERLA_USE_STD_ANY "${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/TestStdAny.cpp"
              COMPILE_DEFINITIONS -DWALBERLA_USE_STD_ANY ${CMAKE_CXX14_STANDARD_COMPILE_OPTION} )
 if( WALBERLA_USE_STD_ANY )
    message( STATUS "Found std::any")
 else()
-   try_compile( WALBERLA_USE_STD_EXPERIMENTAL_ANY "${CMAKE_BINARY_DIR}" "${CMAKE_SOURCE_DIR}/cmake/TestStdAny.cpp"
+   try_compile( WALBERLA_USE_STD_EXPERIMENTAL_ANY "${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/TestStdAny.cpp"
                 COMPILE_DEFINITIONS -DWALBERLA_USE_STD_EXPERIMENTAL_ANY ${CMAKE_CXX14_STANDARD_COMPILE_OPTION} )
    if( WALBERLA_USE_STD_EXPERIMENTAL_ANY )
       message( STATUS "Found std::experimental::any")
    endif()
 endif()
 
-try_compile( WALBERLA_USE_STD_OPTIONAL "${CMAKE_BINARY_DIR}" "${CMAKE_SOURCE_DIR}/cmake/TestStdOptional.cpp"
+try_compile( WALBERLA_USE_STD_OPTIONAL "${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/TestStdOptional.cpp"
              COMPILE_DEFINITIONS -DWALBERLA_USE_STD_OPTIONAL ${CMAKE_CXX14_STANDARD_COMPILE_OPTION} )
 if( WALBERLA_USE_STD_OPTIONAL )
    message( STATUS "Found std::optional")
 else()
-   try_compile( WALBERLA_USE_STD_EXPERIMENTAL_OPTIONAL "${CMAKE_BINARY_DIR}" "${CMAKE_SOURCE_DIR}/cmake/TestStdOptional.cpp"
+   try_compile( WALBERLA_USE_STD_EXPERIMENTAL_OPTIONAL "${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/TestStdOptional.cpp"
                 COMPILE_DEFINITIONS -DWALBERLA_USE_STD_EXPERIMENTAL_OPTIONAL ${CMAKE_CXX14_STANDARD_COMPILE_OPTION} )
    if( WALBERLA_USE_STD_EXPERIMENTAL_OPTIONAL )
       message( STATUS "Found std::experimental::optional")