-AC_CHECK_LIB([ogg], [ogg_stream_init], [], [
- have_ogg="no"
-])
-AC_CHECK_LIB([vorbis], [vorbis_info_init], [], [
- have_ogg="no"
-])
-AC_CHECK_HEADERS([ogg/ogg.h vorbis/codec.h], [], [
- have_ogg="no"
-])
+OLD_CPPFLAGS="$CPPFLAGS"
+OLD_LD_FLAGS="$LDFLAGS"
+OLD_LIBS="$LIBS"
+AC_ARG_WITH(oggvorbis_headers, [AC_HELP_STRING(--with-oggvorbis-headers=dir,
+ [look for vorbis/codec.h also in dir])])
+if test -n "$with_oggvorbis_headers"; then
+ oggvorbis_cppflags="-I$with_oggvorbis_headers"
+ CPPFLAGS="$CPPFLAGS $oggvorbis_cppflags"
+fi
+AC_ARG_WITH(oggvorbis_libs, [AC_HELP_STRING(--with-oggvorbis-libs=dir,
+ [look for oggvorbis libs also in dir])])
+if test -n "$with_oggvorbis_libs"; then
+ oggvorbis_libs="-L$with_oggvorbis_libs"
+ LDFLAGS="$LDFLAGS $oggvorbis_libs"
+fi
+
+AC_CHECK_LIB([ogg], [ogg_stream_init], [], [ have_ogg="no" ])
+AC_CHECK_LIB([vorbis], [vorbis_info_init], [], [ have_ogg="no" ])
+AC_CHECK_HEADERS([ogg/ogg.h vorbis/codec.h], [], [ have_ogg="no" ])