only build sysmocom-femtobts conditionally

configure.ac

@@ -12,15 +12,23 @@ AC_PROG_CC
 AC_PROG_INSTALL
 AC_PROG_RANLIB
 
+dnl checks for header files
+AC_HEADER_STDC
+
+dnl Checks for typedefs, structures and compiler characteristics
+
 dnl checks for libraries
 PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore  >= 0.3.0)
 PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty)
 PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 0.3.3)
 
-dnl checks for header files
-AC_HEADER_STDC
-
-dnl Checks for typedefs, structures and compiler characteristics
+AC_MSG_CHECKING([whether to enable sysmocom-bts hardware support])
+AC_ARG_ENABLE(sysmocom-bts,
+		AC_HELP_STRING([--enable-sysmocom-bts],
+				[enable code for sysmocom femto-bts [default=no]]),
+		[enable_sysmocom_bts="yes"],[enable_sysmocom_bts="no"])
+AC_MSG_RESULT([$enable_sysmocom_bts])
+AM_CONDITIONAL(ENABLE_SYSMOBTS, test "x$enable_sysmocom_bts" = "xyes")
 
 AC_OUTPUT(
     src/Makefile

src/Makefile.am

@@ -1 +1,5 @@
-SUBDIRS = common osmo-bts-sysmo #osmo-bts-bb
+SUBDIRS = common #osmo-bts-bb
+
+if ENABLE_SYSMOBTS
+SUBDIRS += osmo-bts-sysmo
+endif