build: Conditionally compile senseApis

configure.ac

@@ -53,12 +53,16 @@ AC_SUBST([AM_CPPFLAGS])
 AC_SUBST([YACC])
 AC_SUBST([LEX])
 
+m4_include([m4/senseApis.m4])
+AC_SUBST([SENSEAPIS_ENABLED])
+
 AC_CONFIG_HEADERS([include/config.h])
 AC_CONFIG_FILES([
     Makefile hcore/Makefile
     hcore/deviceManager/Makefile
     hcore/senseApis/Makefile
     senseApis/Makefile
+    senseApis/xcbXorg/Makefile
 ])
 
 AC_CONFIG_COMMANDS_POST([
@@ -66,6 +70,8 @@ AC_CONFIG_COMMANDS_POST([
     AC_MSG_NOTICE(m4_normalize([* MIND_VOSCILLATOR_PERIOD_MS:
         ${MIND_VOSCILLATOR_PERIOD_MS} ms
         (freq: ${MIND_VOSCILLATOR_FREQ_MS} Hz)]))
+    AC_MSG_NOTICE(m4_normalize(
+        [* SenseAPI backends enabled: ${SENSEAPIS_ENABLED}]))
 ])
 
 AC_OUTPUT

m4/senseApis.m4

@@ -0,0 +1,16 @@
+SENSEAPIS_ENABLED=
+
+AC_ARG_ENABLE([senseapi-xcbxorg],
+    [AS_HELP_STRING([--enable-senseapi-xcbxorg],
+        [Enable XCB/Xorg SenseAPI backend])],
+    [AS_CASE([$enableval],
+        [no], [enable_senseapi_xcbxorg=no],
+        [yes|*], [
+            enable_senseapi_xcbxorg=yes
+            AC_DEFINE([XCBXORG_ENABLED], [1],
+                [Define to 1 if you have XCB/Xorg SenseAPI backend])
+            SENSEAPIS_ENABLED="${SENSEAPIS_ENABLED} xcbXorg"
+        ]
+    )],
+    [enable_senseapi_xcbxorg=no]
+)

senseApis/Makefile.am

@@ -1,2 +1 @@
-pkglib_LTLIBRARIES=libxcbXorg.la
-libxcbXorg_la_SOURCES=xcbXorg.cpp
+SUBDIRS = @SENSEAPIS_ENABLED@

senseApis/xcbXorg/Makefile.am

@@ -0,0 +1,2 @@
+pkglib_LTLIBRARIES=libxcbXorg.la
+libxcbXorg_la_SOURCES=xcbXorg.cpp