diff -ruN cinelerra-gg/cinelerra-5.1/configure.ac cinelerra-gg-new/cinelerra-5.1/configure.ac
--- cinelerra-gg/cinelerra-5.1/configure.ac	2017-08-07 10:39:25.977492228 +0800
+++ cinelerra-gg-new/cinelerra-5.1/configure.ac	2017-08-07 10:37:58.000000000 +0800
@@ -547,8 +547,8 @@
 EXRIStream() : Imf::IStream("mypath") {} };
 class EXROStream : public Imf::OStream { public: 
 EXROStream() : Imf::OStream("mypath") {} };
-]])], [HAVE_OPENEXR=yes], [HAVE_OPENEXR=no])
- RESULT="$HAVE_OPENEXR"
+]])], [HAVE_openexr=yes], [HAVE_openexr=no])
+ RESULT="$HAVE_openexr"
  if test "x$RESULT" = "xyes"; then
    SHARED_openexr="$LIBS"
    CFG_CFLAGS+=" -I/usr/include/OpenEXR"
@@ -556,9 +556,9 @@
  LIBS="$saved_LIBS"
  CXXFLAGS="$saved_CXXFLAGS"
  AC_LANG_POP(C++)
- AC_MSG_RESULT([$HAVE_OPENEXR])
+ AC_MSG_RESULT([$HAVE_openexr])
 ])
-AC_SUBST([HAVE_OPENEXR])
+AC_SUBST([HAVE_openexr])
 
 # build global_config
 OBJDIR=`uname -m`
@@ -597,7 +597,7 @@
         libtheora/libogg libtheora/libvorbis ; do
   lib=`dirname $dep`;  needs=`basename $dep`
   eval pkg_lib="\$PKG_$lib"; eval needs_lib="\$HAVE_$needs";
-  if test "x$pkg_lib" != "xno"; then
+  if test "x$pkg_lib" != "xno" -a "x$needs_lib" != "xyes"; then
     eval "PKG_$needs=yes"
   fi
 done