Index: graphics/mesa-dri/Makefile
===================================================================
--- graphics/mesa-dri/Makefile	(revision 451990)
+++ graphics/mesa-dri/Makefile	(working copy)
@@ -3,6 +3,7 @@
 
 PORTNAME=	mesa-dri
 PORTVERSION=	${MESAVERSION}
+PORTREVISION=	1
 CATEGORIES=	graphics
 
 COMMENT=	OpenGL hardware acceleration drivers for DRI2+
Index: graphics/mesa-dri/files/patch-src_gallium_auxiliary_util_u__cpu__detect.c
===================================================================
--- graphics/mesa-dri/files/patch-src_gallium_auxiliary_util_u__cpu__detect.c	(nonexistent)
+++ graphics/mesa-dri/files/patch-src_gallium_auxiliary_util_u__cpu__detect.c	(working copy)
@@ -0,0 +1,70 @@
+Assume NEON if targeting NEON-capable hardware, detect otherwise
+Don't rely on SIGILL but use sysctl to detect AltiVec on powerpc*
+
+--- src/gallium/auxiliary/util/u_cpu_detect.c.orig	2017-10-02 15:49:02 UTC
++++ src/gallium/auxiliary/util/u_cpu_detect.c
+@@ -53,8 +53,9 @@
+ #endif
+ 
+ #if defined(PIPE_OS_FREEBSD) || defined(PIPE_OS_DRAGONFLY)
+-#include <sys/types.h>
++#include <sys/param.h>
+ #include <sys/sysctl.h>
++#include <elf.h>
+ #endif
+ 
+ #if defined(PIPE_OS_LINUX)
+@@ -112,13 +113,21 @@ sigill_handler(int sig)
+ static void
+ check_os_altivec_support(void)
+ {
++#if defined(PIPE_OS_APPLE) || defined(PIPE_OS_FREEBSD) || defined(PIPE_OS_NETBSD) || defined(PIPE_OS_OPENBSD)
+ #if defined(PIPE_OS_APPLE)
+    int sels[2] = {CTL_HW, HW_VECTORUNIT};
++#elif defined(PIPE_OS_NETBSD) || defined(PIPE_OS_OPENBSD)
++   int sels[2] = {CTL_MACHDEP, CPU_ALTIVEC};
++#endif
+    int has_vu = 0;
+    int len = sizeof (has_vu);
+    int err;
+ 
++#if defined(PIPE_OS_FREEBSD)
++   err = sysctlbyname("hw.altivec", &has_vu, &len, NULL, 0 );
++#else
+    err = sysctl(sels, 2, &has_vu, &len, NULL, 0);
++#endif
+ 
+    if (err == 0) {
+       if (has_vu != 0) {
+@@ -311,13 +320,30 @@ check_os_arm_support(void)
+     * used. Because of this we cannot use PIPE_OS_ANDROID here, but rather
+     * have a separate macro that only gets enabled from respective Android.mk.
+     */
+-#if defined(HAS_ANDROID_CPUFEATURES)
++#if defined(__ARM_NEON)
++   util_cpu_caps.has_neon = 1;
++#elif defined(HAS_ANDROID_CPUFEATURES)
+    AndroidCpuFamily cpu_family = android_getCpuFamily();
+    uint64_t cpu_features = android_getCpuFeatures();
+ 
+    if (cpu_family == ANDROID_CPU_FAMILY_ARM) {
+       if (cpu_features & ANDROID_CPU_ARM_FEATURE_NEON)
+          util_cpu_caps.has_neon = 1;
++   }
++#elif defined(PIPE_OS_FREEBSD) && defined(HWCAP_NEON)
++   Elf_Auxinfo auxv[AT_COUNT];
++   size_t len = sizeof(auxv);
++   int mib[] = {
++      CTL_KERN,
++      KERN_PROC,
++      KERN_PROC_AUXV,
++      getpid(),
++   };
++
++   if (sysctl(mib, nitems(mib), auxv, &len, NULL, 0) != -1) {
++      for (size_t i = 0; i < nitems(auxv); i++)
++         if (auxv[i].a_type == AT_HWCAP && auxv[i].a_un.a_val & HWCAP_NEON)
++             util_cpu_caps.has_neon = 1;
+    }
+ #elif defined(PIPE_OS_LINUX)
+     Elf32_auxv_t aux;