Add error message if neither DZEN nor XMOBAR is defined

diff --git a/i3status.h b/i3status.h
index 19260217eda422c29da5123776e051b23b2ec7e9..0a425558bab24375da20fb048072737cdf757dd0 100644 (file)
--- a/i3status.h
+++ b/i3status.h
@@ -1,6 +1,10 @@
 #ifndef _I3STATUS_H
 #define _I3STATUS_H
 
+#if !defined(DZEN) && !defined(XMOBAR)
+       #error "You have to enable either -DDZEN or -DXMOBAR"
+#endif
+
 #include <stdbool.h>
 #include <confuse.h>