X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fgl_oset.h;h=5134065e5e2061267026389c711e988984501cf2;hb=ec68a6fee63ee22364cb88f215b906989ab6b33c;hp=575ffd3c307f968c081b0ac8fcfe58bf48760644;hpb=9fc81090f6c5590bd1b0e0fa5087577a2ee43a3e;p=gnulib.git

diff --git a/lib/gl_oset.h b/lib/gl_oset.h
index 575ffd3c3..5134065e5 100644
--- a/lib/gl_oset.h
+++ b/lib/gl_oset.h
@@ -21,6 +21,9 @@
 #include <stdbool.h>
 #include <stddef.h>
 
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
 _GL_INLINE_HEADER_BEGIN
 #ifndef GL_OSET_INLINE
 # define GL_OSET_INLINE _GL_INLINE