pkg-config files added

CMakeLists.txt

 cmake_minimum_required(VERSION 3.1)
-project(pinkIndexer)
+project(pinkIndexer VERSION 1.0)
+
+include(GNUInstallDirs)
 
 option(PINKINDEXER_BUILD_EXECUTABLE "Build the test executable for pinkIndexer" OFF)
  
@@ -82,8 +84,8 @@ set_target_properties(pinkIndexer PROPERTIES
 
 
 install(TARGETS pinkIndexer 
-        LIBRARY DESTINATION lib
-        RUNTIME DESTINATION lib
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
 )
 
 install(
@@ -95,3 +97,7 @@ install(
 	PATTERN "Eigen" EXCLUDE
 )
 
+# pinkIndexer.pc
+configure_file(pinkIndexer.pc.in pinkIndexer.pc)
+install(FILES ${CMAKE_BINARY_DIR}/pinkIndexer.pc
+        DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
\ No newline at end of file

pinkIndexer.pc.in

+prefix=${CMAKE_INSTALL_PREFIX}
+exec_prefix=${CMAKE_INSTALL_PREFIX}
+libdir=${CMAKE_INSTALL_FULL_LIBDIR}
+includedir=${CMAKE_INSTALL_FULL_INCLUDEDIR}
+
+Name: pinkIndexer
+Description: Indexing program for serial X-ray crystallography
+Version: ${PROJECT_VERSION}
+Cflags: -I${CMAKE_INSTALL_FULL_INCLUDEDIR}
+Libs: -L${CMAKE_INSTALL_FULL_LIBDIR} -lpinkIndexer
+