Import patch to add FreeBSD support.

ltconfig

@@ -1111,6 +1111,18 @@ darwin* | rhapsody*)
   shlibpath_var=DYLD_LIBRARY_PATH
   ;;
 
+freebsd*-gnu*)
+  version_type=linux
+  need_lib_prefix=no
+  need_version=no
+  library_names_spec='${libname}${release}.so$versuffix ${libname}${release}.so${major} ${libname}.so'
+  soname_spec='${libname}${release}.so${major}'
+  shlibpath_var=LD_LIBRARY_PATH
+  shlibpath_overrides_runpath=no
+  hardcode_into_libs=yes
+  dynamic_linker='GNU/FreeBSD ld.so'
+  ;;
+
 freebsd1*)
   dynamic_linker=no
   ;;