[configure] Add an explicit check for mce-dev. Fixes MER#1903

* add explicit check for mce development headers during configure stage
* provide relevant CFLAGS for sources, that explicitly include mce headers

configure.ac

@@ -206,6 +206,9 @@ AM_PROG_CC_C_O()
 PKG_CHECK_MODULES(GLIB, glib-2.0)
 PKG_CHECK_MODULES(DBUS, dbus-1)
 PKG_CHECK_MODULES(DBUSGLIB, dbus-glib-1)
+PKG_CHECK_MODULES(MCE_DEV, mce,
+		  [],
+		  AC_MSG_ERROR(Development files for mce are missing. Install mce-headers / mce-dev.))
 if test "x$enable_vibra_feedback" != xno; then
 PKG_CHECK_MODULES(LIBNGF, libngf0 >= 0.24)
 fi

modules/Makefile.am

@@ -129,7 +129,7 @@ usbtracker_la_CFLAGS = $(AM_CFLAGS) $(GLIB_CFLAGS) $(DBUS_CFLAGS)
 usbtracker_la_LIBADD = $(GLIB_LIBS) $(DBUS_LIBS)
 
 iphb_la_SOURCES = iphb.c
-iphb_la_CFLAGS = $(AM_CFLAGS) $(GLIB_CFLAGS) $(DBUS_CFLAGS)
+iphb_la_CFLAGS = $(AM_CFLAGS) $(GLIB_CFLAGS) $(DBUS_CFLAGS) $(MCE_DEV_CFLAGS)
 iphb_la_CPPFLAGS = $(AM_CPPFLAGS)
 iphb_la_LIBADD = $(GLIB_LIBS) $(DBUS_LIBS)
 
@@ -170,7 +170,7 @@ endif
 
 if WANT_BATTERY_TRACKER
 batterytracker_la_SOURCES = batterytracker.c
-batterytracker_la_CFLAGS = $(AM_CFLAGS) $(GLIB_CFLAGS) $(DBUS_CFLAGS)
+batterytracker_la_CFLAGS = $(AM_CFLAGS) $(GLIB_CFLAGS) $(DBUS_CFLAGS) $(MCE_DEV_CFLAGS)
 batterytracker_la_LIBADD = $(GLIB_LIBS)
 endif