Move out sgsn to its own subdir

Change-Id: I16fccc0eadf588599b9e5578d0f4dbaf9df81737
diff --git a/src/sgsn/Makefile.am b/src/sgsn/Makefile.am
new file mode 100644
index 0000000..a8da943
--- /dev/null
+++ b/src/sgsn/Makefile.am
@@ -0,0 +1,88 @@
+AM_CPPFLAGS = \
+	$(all_includes) \
+	-I$(top_srcdir)/include \
+	-I$(top_builddir) \
+	$(NULL)
+
+AM_CFLAGS = \
+	-Wall \
+	-fno-strict-aliasing \
+	$(LIBOSMOCORE_CFLAGS) \
+	$(LIBOSMOGSM_CFLAGS) \
+	$(LIBOSMOVTY_CFLAGS) \
+	$(LIBOSMOCTRL_CFLAGS) \
+	$(LIBOSMOABIS_CFLAGS) \
+	$(LIBOSMOGB_CFLAGS) \
+	$(LIBOSMOGSUPCLIENT_CFLAGS) \
+	$(COVERAGE_CFLAGS) \
+	$(LIBCARES_CFLAGS) \
+	$(LIBGTP_CFLAGS) \
+	$(NULL)
+if BUILD_IU
+AM_CFLAGS += \
+	$(LIBASN1C_CFLAGS) \
+	$(LIBOSMOSIGTRAN_CFLAGS) \
+	$(LIBOSMORANAP_CFLAGS) \
+	$(NULL)
+endif
+
+OSMO_LIBS = \
+	$(LIBOSMOCORE_LIBS) \
+	$(LIBOSMOGSM_LIBS) \
+	$(LIBOSMOVTY_LIBS) \
+	$(LIBOSMOCTRL_LIBS) \
+	$(LIBOSMOGB_LIBS) \
+	$(LIBGTP_LIBS) \
+	$(NULL)
+
+bin_PROGRAMS = \
+	osmo-sgsn \
+	$(NULL)
+
+osmo_sgsn_SOURCES = \
+	gprs_gb.c \
+	gprs_gmm_attach.c \
+	gprs_gmm.c \
+	gprs_mm_state_gb_fsm.c \
+	gprs_mm_state_iu_fsm.c \
+	gprs_ranap.c \
+	gprs_sgsn.c \
+	gprs_sndcp.c \
+	gprs_sndcp_comp.c \
+	gprs_sndcp_dcomp.c \
+	gprs_sndcp_pcomp.c \
+	gprs_sndcp_vty.c \
+	gprs_sndcp_xid.c \
+	sgsn_main.c \
+	sgsn_vty.c \
+	sgsn_libgtp.c \
+	gprs_llc.c \
+	gprs_llc_vty.c \
+	sgsn_ctrl.c \
+	sgsn_auth.c \
+	gprs_subscriber.c \
+	sgsn_cdr.c \
+	slhc.c \
+	gprs_llc_xid.c \
+	v42bis.c \
+	$(NULL)
+osmo_sgsn_LDADD = \
+	$(top_builddir)/src/gprs/gprs_llc_parse.o \
+	$(top_builddir)/src/gprs/crc24.o \
+	$(top_builddir)/src/gprs/gprs_utils.o \
+	$(top_builddir)/src/gprs/sgsn_ares.o \
+	$(OSMO_LIBS) \
+	$(LIBOSMOABIS_LIBS) \
+	$(LIBOSMOGSUPCLIENT_LIBS) \
+	$(LIBCARES_LIBS) \
+	$(LIBGTP_LIBS) \
+	-lrt \
+	-lm \
+	$(NULL)
+if BUILD_IU
+osmo_sgsn_LDADD += \
+	$(LIBOSMOSIGTRAN_LIBS) \
+	$(LIBOSMORANAP_LIBS) \
+	$(LIBASN1C_LIBS) \
+	$(NULL)
+endif