$OpenBSD$

Index: cmake/create_pkgconfig_file.cmake
--- cmake/create_pkgconfig_file.cmake.orig
+++ cmake/create_pkgconfig_file.cmake
@@ -233,6 +233,8 @@ function(create_pkgconfig_file)
         # http://www.freebsd.org/doc/handbook/dirstructure.html
         if(${CMAKE_SYSTEM_NAME} STREQUAL "FreeBSD")
             set(_PKGCONFIG_INSTALL_DESTINATION "libdata/pkgconfig")
+        elseif(${CMAKE_SYSTEM_NAME} STREQUAL "OpenBSD")
+            set(_PKGCONFIG_INSTALL_DESTINATION "libdata/pkgconfig")
         else()
             set(_PKGCONFIG_INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
         endif()
