headers: check that _GL_INLINE_HEADER_BEGIN is defined

[gnulib.git] / lib / unistd.in.h

diff --git a/lib/unistd.in.h b/lib/unistd.in.h
index 31e20bc..2543a40 100644 (file)
--- a/lib/unistd.in.h
+++ b/lib/unistd.in.h
@@ -116,6 +116,9 @@
 # include <getopt.h>
 #endif
 
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
 _GL_INLINE_HEADER_BEGIN
 #ifndef _GL_UNISTD_INLINE
 # define _GL_UNISTD_INLINE _GL_INLINE