Using CMAKE properties instead of variables for linking.

CMakeLists.txt

@@ -104,7 +104,11 @@ endif()
 target_compile_options(${libraryname} PUBLIC ${COMPILER_OPTIONS})
 
 # install
-set_property(TARGET ${libraryname} PROPERTY PUBLIC_HEADER ${ALGLIB_HEADERS})
+set_target_properties(${libraryname} PROPERTIES VERSION       ${ALGLIB_VERSION}
+                                                PUBLIC_HEADER "${ALGLIB_HEADERS}")
+
+target_include_directories(${libraryname} PUBLIC "$<BUILD_INTERFACE:${UNZIP_DIR}/cpp/src>"
+                                                 "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
 
 install(TARGETS ${libraryname}
         EXPORT ${libraryname}

README.md

@@ -38,14 +38,12 @@ Once the library is installed, you can link it using `CMake` with as little effo
 ...
 find_package(ALGLIB REQUIRED)
 ...
-target_link_libraries(<target> PRIVATE ${ALGLIB_LIB})
-...
-target_include_directories(<target> PRIVATE ${ALGLIB_INCLUDE_DIRS})
+target_link_libraries(<target> PRIVATE ALGLIB)
 ...
 ```
 
-Note that unless you did not use the default value of `CMAKE_INSTALL_PREFIX`, the `<prefix>` in which you installed iDynTree will need to be appended to the `CMAKE_PREFIX_PATH` enviromental
-variable to ensure that `find_package` can find your iDynTree installation. Alternatively, you can specify the environmental variable
+Note that unless you did not use the default value of `CMAKE_INSTALL_PREFIX`, the `<prefix>` in which you installed ALGLIB will need to be appended to the `CMAKE_PREFIX_PATH` enviromental
+variable to ensure that `find_package` can find your ALGLIB installation. Alternatively, you can specify the environmental variable
 ```bash
 export ALGLIB_DIR=path/where/alglib-cmake/is/installed
 ```

cmake/ALGLIB-config.cmake.in

@@ -8,9 +8,8 @@
 
 # - Try to find alglib
 # Once done this will define
-#  ALGLIB_INCLUDE_DIRS - The alglib include directory
-#  ALGLIB_LIB - The libraries needed to use alglib
 #  ALGLIB_FOUND -  True if ALGLIB found.
+#  ALGLIB target
 
 set(ALGLIB_VERSION @ALGLIB_VERSION@)
 set(ALGLIB_FOUND TRUE)
@@ -19,6 +18,3 @@ set(ALGLIB_FOUND TRUE)
 if(NOT TARGET ALGLIB)
   include("${CMAKE_CURRENT_LIST_DIR}/ALGLIB.cmake")
 endif()
-
-set_and_check(ALGLIB_INCLUDE_DIRS  "@CMAKE_INSTALL_FULL_INCLUDEDIR@" )
-set(ALGLIB_LIB ALGLIB)