configure: check for arm_neon.h w/neon builds

fails at configure time rather than compile time unless using
--enable-external-build

Change-Id: I966ee1000e28fdcc3f4a29759789b056faee0010

1 files changed, 4 insertions, 0 deletions

diff --git a/configure b/configure
index 702483f13..35b703ac4 100755
--- a/configure
+++ b/configure
@@ -593,6 +593,10 @@ EOF
     check_header unistd.h # for sysconf(3) and friends.
 
     check_header vpx/vpx_integer.h -I${source_path} && enable_feature vpx_ports
+
+    if enabled neon && ! enabled external_build; then
+      check_header arm_neon.h || die "Unable to find arm_neon.h"
+    fi
 }
 
 process_toolchain() {