$NetBSD: patch-ab,v 1.4 2013/07/31 18:25:28 adam Exp $

Disable ucontext.h detection, which leads to problems on some platforms.
Shell portabibility fix.
Disable univeral binary build on Mac OS X.

--- configure.orig	2013-06-18 19:55:25.000000000 +0000
+++ configure
@@ -16437,7 +16437,7 @@ fi
 
 
 
-for ac_header in limits.h unistd.h ucontext.h
+for ac_header in limits.h unistd.h
 do
 as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
@@ -17212,7 +17212,7 @@ LIB_SUFFIX=""
 lib_suffix_valid="no"
 
 lib_namespace=""
-if test "x${library_namespace_versioning}" == xyes ; then
+if test "x${library_namespace_versioning}" = xyes ; then
     cat >>confdefs.h <<_ACEOF
 #define IMATH_INTERNAL_NAMESPACE Imath_${ILMBASE_VERSION_API}
 _ACEOF
@@ -17233,7 +17233,7 @@ _ACEOF
     lib_namespace="${ILMBASE_VERSION_API}"
     LIB_SUFFIX="${ILMBASE_VERSION_API}"
     lib_suffix_valid="yes"
-elif test "x${library_namespace_versioning}" == xno ; then
+elif test "x${library_namespace_versioning}" = xno ; then
     cat >>confdefs.h <<_ACEOF
 #define IMATH_INTERNAL_NAMESPACE Imath
 _ACEOF
@@ -17271,7 +17271,7 @@ _ACEOF
 fi
 
 
-if test "x${lib_suffix_valid}" == xyes ; then
+if test "x${lib_suffix_valid}" = xyes ; then
 LIB_SUFFIX_DASH="-${LIB_SUFFIX}"
 
  if true; then
@@ -17306,7 +17306,7 @@ else
 fi
 
 
-if test "x${custom_public_namespace}" == xyes ; then
+if test "x${custom_public_namespace}" = xyes ; then
     { $as_echo "$as_me:$LINENO: WARNING: Enabling 'custom user namespace' requires an additional argument, reverting to default" >&5
 $as_echo "$as_me: WARNING: Enabling 'custom user namespace' requires an additional argument, reverting to default" >&2;}
     cat >>confdefs.h <<\_ACEOF
@@ -17324,7 +17324,7 @@ _ACEOF
 
     public_namespace=""
     custom_public_namespace=no
-elif test "x${custom_public_namespace}" == xno ; then
+elif test "x${custom_public_namespace}" = xno ; then
     cat >>confdefs.h <<\_ACEOF
 #define IMATH_NAMESPACE Imath
 _ACEOF
@@ -17373,12 +17373,10 @@ else
 fi
 
 
-  if test "${osx_arch}" != default ; then
-          osx_arch_flags="-arch ${osx_arch// / -arch }"
+  if false ; then
      CXXFLAGS="$CXXFLAGS $osx_arch_flags"
 
           if test "$enable_dependency_tracking" != no ; then
-        osx_arch_array=( ${osx_arch} )
         if test ${#osx_arch_array[@]} -gt 1 ; then
           { { $as_echo "$as_me:$LINENO: error: building multiple OS X architectures requires --disable-dependency-tracking.
 Please re-run configure with these options: