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" PKG_CHECK_MODULES([XCB], [xcb], [], [ AC_MSG_ERROR(m4_normalize([XCB library not found. Sense API XCB/Xorg requires the XCB dev headers and shlib.])) ]) AC_SUBST([XCB_CFLAGS]) AC_SUBST([XCB_LIBS]) ] )], [enable_senseapi_xcbxorg=no] )