[C++] Add pkg-config file

Author: stephanlachnit

lang/c++/CMakeLists.txt

@@ -308,3 +308,12 @@ install(FILES
     "${CMAKE_CURRENT_BINARY_DIR}/AvroConfigVersion.cmake"
     DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Avro
 )
+
+configure_file(
+    "${CMAKE_CURRENT_SOURCE_DIR}/cmake/avro-cpp.pc.in"
+    "${CMAKE_CURRENT_BINARY_DIR}/avro-cpp.pc"
+    @ONLY
+)
+install(FILES "${CMAKE_CURRENT_BINARY_DIR}/avro-cpp.pc"
+        DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig"
+)

lang/c++/cmake/avro-cpp.pc.in

@@ -0,0 +1,12 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
+
+Name: avro-cpp
+Description: C++ library for parsing Avro data
+URL: https://avro.apache.org/
+Version: @AVRO_VERSION@
+
+Cflags: -I${includedir}
+Libs: -L${libdir} -lavrocpp
+Requires: fmt