md5, sha1, sha256, sha512: add gl_SET_CRYPTO_CHECK_DEFAULT

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

diff --git a/lib/math.in.h b/lib/math.in.h
index 7189819..6cc0f7d 100644 (file)
--- a/lib/math.in.h
+++ b/lib/math.in.h
@@ -28,6 +28,9 @@
 #ifndef _@GUARD_PREFIX@_MATH_H
 #define _@GUARD_PREFIX@_MATH_H
 
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
 _GL_INLINE_HEADER_BEGIN
 #ifndef _GL_MATH_INLINE
 # define _GL_MATH_INLINE _GL_INLINE