create libosmoisdn sub-library
There are some parts of libosmogsm which are not really GSM specific,
but rather ISDN bits that were inherited by GSM. This includes the
I.460 multiplex as well as the core LAPD protocol.
Let's move those bits to its own libosmoisdn library, before we add
more ISDN specific bits to the wrong place.
Backwards-compatibility is created by making libosmogsm depend on
libosmoisdn, and by providing wrapper include files for source
compatibility.
Change-Id: Ib1a6c762322fd5047be3188b1df22408ef06aa50
diff --git a/Doxyfile.gsm.in b/Doxyfile.gsm.in
index fd89390..c04a1f6 100644
--- a/Doxyfile.gsm.in
+++ b/Doxyfile.gsm.in
@@ -1485,7 +1485,7 @@
# If a tag file is not located in the directory in which doxygen
# is run, you must also specify the path to the tagfile here.
-TAGFILES = doc/libosmocore.tag=../../core/html doc/libosmovty.tag=../../vty/html doc/libosmocodec.tag=../../codec/html doc/libosmocoding.tag=../../coding/html doc/libosmoctrl.tag=../../ctrl/html doc/libosmogb.tag=../../gb/html
+TAGFILES = doc/libosmocore.tag=../../core/html doc/libosmoisdn.tag=../../isdn/html doc/libosmovty.tag=../../vty/html doc/libosmocodec.tag=../../codec/html doc/libosmocoding.tag=../../coding/html doc/libosmoctrl.tag=../../ctrl/html doc/libosmogb.tag=../../gb/html
# When a file name is specified after GENERATE_TAGFILE, doxygen will create
# a tag file that is based on the input files it reads.