Failure to build as a subdirectory

[william-swy]

Hi. One of my projects needed to use the ALGLIB library and it seems that their website did not have CMake support. This repo seems to do most of the work with downloading the tar and building it. Only issue is that when when this thing is built as a subdirectory, the script from the CMakeLists.txt fails to configure at

configure_package_config_file(${CMAKE_SOURCE_DIR}/cmake/ALGLIB-config.cmake.in
                              ${CMAKE_BINARY_DIR}/alglib-config.cmake
                              INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/ALGLIB)

I'm quite sure the CMAKE_SOURCE_DIR should be CMAKE_CURRENT_SOURCE_DIR and likewise for the binary directory because otherwise it is using the value set by the parent project which messes up the configuration process (at least after making these changes the configuration spewed no errors).

Also when I was debugging the build script I did notice that on line 23 the comment output paths is misspelt as ouptut paths.

Another edit I have a feeling that the output paths should be this instead

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}")
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}")
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}")