Added pkg-config support info to GSG (#543) (#582)

Signed-off-by: Dylan Benito <[email protected]>
(cherry picked from commit 527fbca)

Co-authored-by: Dylan <[email protected]>

Author: ValentinaKats

documentation/library_guide/onedpl_gsg.rst

@@ -43,6 +43,32 @@ To use tested C++ standard APIs, you need to include the corresponding C++ stand
 and use the ``std`` namespace.
 
 
+pkg-config Support
+==================
+
+The pkg-config program is used to retrieve information about your installed libraries, and
+to compile and link against one or more libraries.
+
+Use pkg-config with |onedpl_short|
+----------------------------------
+
+Use pkg-config with the ``--cflags`` flag to get the include path to the oneDPL directory:
+
+.. code:: cpp
+
+  dpcpp test.cpp $(pkg-config --cflags dpl)
+  
+The ``--msvc-syntax`` flag is required when you use a Microsoft Visual C++* compiler.
+This flag converts your compiling and linking flags to the appropriate form:
+
+.. code:: cpp
+
+  dpcpp test.cpp $(pkg-config --msvc-syntax --cflags dpl)
+
+.. note::
+  Use the pkg-config tool to get rid of large hard-coded paths and make compilation more portable.
+
+
 Usage Examples
 ==============