From 69a163b1f9d7099146512adc51e078eb48f62b8a Mon Sep 17 00:00:00 2001
From: Glenn Randers-Pehrson <glennrp at users.sourceforge.net>
Date: Fri, 26 Apr 2013 16:13:29 -0500
Subject: [PATCH] [libpng15] Test for 'arm*' not just 'arm' in the host_cpu
 configure variable.

---
 CHANGES      |  1 +
 configure.ac | 12 +++++++-----
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/CHANGES b/CHANGES
index 1f656c063..dae78c5a2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4084,6 +4084,7 @@ Version 1.5.16beta02 [April 26, 2013]
   Regenerated configure files.
 
 Version 1.5.16beta03 [April 26, 2013]
+  Test for 'arm*' not just 'arm' in the host_cpu configure variable.
 
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diff --git a/configure.ac b/configure.ac
index 546346873..dde64cf56 100644
--- a/configure.ac
+++ b/configure.ac
@@ -200,14 +200,16 @@ AC_ARG_ENABLE([arm-neon],
          AC_MSG_ERROR([--enable-arm-neon=${enable_arm_neon}: invalid value])
    esac])
 
-# If enable/disable was not specified default to using the optimizations if the
-# host CPU is ARM and the compiler is targeting a NEON host.  The latter test
-# is done in scripts/pnglibconf.dfa by checking for __ARM_NEON__.  The
-# AM_CONDITIONAL below controls whether the ARM NEON source files are built.
+# Add ARM specific files to all builds where the host_cpu is arm ('arm*') or
+# where ARM optimizations were explicitly requested (this allows a fallback if a
+# future host CPU does not match 'arm*')
 
 AM_CONDITIONAL([PNG_ARM_NEON],
    [test "$enable_arm_neon" != 'no' &&
-    test "$host_cpu" = 'arm' -o "$enable_arm_neon" != ''])
+    case "$host_cpu" in
+      arm*) :;;
+      *)    test "$enable_arm_neon" != '';;
+    esac])
  
 AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]])