X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/df92b047912b261858e0368cbbc435aa05c4c98d..8d6cb5fdac4b2bab0922fe431e12d8f7cc02d723:/src/src/mytypes.h

diff --git a/src/src/mytypes.h b/src/src/mytypes.h
index a3496a298..c51c870c2 100644
--- a/src/src/mytypes.h
+++ b/src/src/mytypes.h
@@ -3,6 +3,7 @@
 *************************************************/
 
 /* Copyright (c) University of Cambridge 1995 - 2018 */
+/* Copyright (c) The Exim Maintainers 2020 - 2021 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 
@@ -29,17 +30,20 @@ local_scan.h includes it and exim.h includes them both (to get this earlier). */
 
 
 /* If gcc is being used to compile Exim, we can use its facility for checking
-the arguments of printf-like functions. This is done by a macro. */
+the arguments of printf-like functions. This is done by a macro.
+OpenBSD has unfortunately taken to objecting to use of %n in printf
+so we have to give up on all of the available parameter checking. */
 
 #if defined(__GNUC__) || defined(__clang__)
-# define PRINTF_FUNCTION(A,B)	__attribute__((format(printf,A,B)))
+# ifndef __OpenBSD__
+#  define PRINTF_FUNCTION(A,B)	__attribute__((format(printf,A,B)))
+# endif
 # define ARG_UNUSED		__attribute__((__unused__))
 # define WARN_UNUSED_RESULT	__attribute__((__warn_unused_result__))
 # define ALLOC			__attribute__((malloc))
 # define ALLOC_SIZE(A)		__attribute__((alloc_size(A)))
 # define NORETURN		__attribute__((noreturn))
 #else
-# define PRINTF_FUNCTION(A,B)
 # define ARG_UNUSED		/**/
 # define WARN_UNUSED_RESULT	/**/
 # define ALLOC			/**/
@@ -47,10 +51,14 @@ the arguments of printf-like functions. This is done by a macro. */
 # define NORETURN		/**/
 #endif
 
+#ifndef PRINTF_FUNCTION
+# define PRINTF_FUNCTION(A,B)	/**/
+#endif
+
 #ifdef WANT_DEEPER_PRINTF_CHECKS
 # define ALMOST_PRINTF(A, B) PRINTF_FUNCTION(A, B)
 #else
-# define ALMOST_PRINTF(A, B)
+# define ALMOST_PRINTF(A, B)	/**/
 #endif