diff --git a/devel/m4/Makefile b/devel/m4/Makefile
index 6dddf4e92a28..6a1695f01d79 100644
--- a/devel/m4/Makefile
+++ b/devel/m4/Makefile
@@ -6,8 +6,7 @@
 #
 
 PORTNAME=	m4
-PORTVERSION=	1.4.14
-PORTREVISION=	1
+PORTVERSION=	1.4.15
 PORTEPOCH=	1
 CATEGORIES=	devel
 MASTER_SITES=	${MASTER_SITE_GNU}
diff --git a/devel/m4/distinfo b/devel/m4/distinfo
index 9998d796d596..3638d621b506 100644
--- a/devel/m4/distinfo
+++ b/devel/m4/distinfo
@@ -1,3 +1,3 @@
-MD5 (m4-1.4.14.tar.bz2) = e6fb7d08d50d87e796069cff12a52a93
-SHA256 (m4-1.4.14.tar.bz2) = 0885ffa93256353a96b1cf0bcbc4d639ed09953b687e6cc412c4048e656f4dd2
-SIZE (m4-1.4.14.tar.bz2) = 1125670
+MD5 (m4-1.4.15.tar.bz2) = c7c32540bc3842d5550f88d47ef551d8
+SHA256 (m4-1.4.15.tar.bz2) = 0aafea5cb30f9304a73535c4ef473e6657a8fcfc0ccb2d0ae4861a4824d4fff9
+SIZE (m4-1.4.15.tar.bz2) = 1201245
diff --git a/devel/m4/files/patch-lib_spawn.in.h b/devel/m4/files/patch-lib_spawn.in.h
deleted file mode 100644
index 2e683dcb2a77..000000000000
--- a/devel/m4/files/patch-lib_spawn.in.h
+++ /dev/null
@@ -1,50 +0,0 @@
-2010-03-02  Bruno Haible  <bruno@clisp.org>
-
-	spawn: Don't override the system defined values on FreeBSD 8.
-	* lib/spawn.in.h (POSIX_SPAWN_RESETIDS, POSIX_SPAWN_SETPGROUP,
-	POSIX_SPAWN_SETSIGDEF, POSIX_SPAWN_SETSIGMASK,
-	POSIX_SPAWN_SETSCHEDPARAM, POSIX_SPAWN_SETSCHEDULER): Don't redefine
-	if HAVE_POSIX_SPAWN is 1.
-	Reported by Johan van Selst <johans@stack.nl> via Eric Blake.
-
-*** lib/spawn.in.h.orig	Tue Mar  2 11:53:02 2010
---- lib/spawn.in.h	Tue Mar  2 11:48:54 2010
-***************
-*** 110,126 ****
-  
-  
-  /* Flags to be set in the `posix_spawnattr_t'.  */
-! #if @REPLACE_POSIX_SPAWN@
-  /* Use the values from the system, for better compatibility.  */
-  /* But this implementation does not support AIX extensions.  */
-! # undef POSIX_SPAWN_FORK_HANDLERS
-! #else
-! # define POSIX_SPAWN_RESETIDS           0x01
-! # define POSIX_SPAWN_SETPGROUP          0x02
-! # define POSIX_SPAWN_SETSIGDEF          0x04
-! # define POSIX_SPAWN_SETSIGMASK         0x08
-! # define POSIX_SPAWN_SETSCHEDPARAM      0x10
-! # define POSIX_SPAWN_SETSCHEDULER       0x20
-  #endif
-  /* A GNU extension.  Use the next free bit position.  */
-  #define POSIX_SPAWN_USEVFORK \
---- 110,128 ----
-  
-  
-  /* Flags to be set in the `posix_spawnattr_t'.  */
-! #if !@HAVE_POSIX_SPAWN@
-! # if @REPLACE_POSIX_SPAWN@
-  /* Use the values from the system, for better compatibility.  */
-  /* But this implementation does not support AIX extensions.  */
-! #  undef POSIX_SPAWN_FORK_HANDLERS
-! # else
-! #  define POSIX_SPAWN_RESETIDS           0x01
-! #  define POSIX_SPAWN_SETPGROUP          0x02
-! #  define POSIX_SPAWN_SETSIGDEF          0x04
-! #  define POSIX_SPAWN_SETSIGMASK         0x08
-! #  define POSIX_SPAWN_SETSCHEDPARAM      0x10
-! #  define POSIX_SPAWN_SETSCHEDULER       0x20
-! # endif
-  #endif
-  /* A GNU extension.  Use the next free bit position.  */
-  #define POSIX_SPAWN_USEVFORK \