Index: libquicktime-1.0.0/configure.ac
===================================================================
--- libquicktime-1.0.0.orig/configure.ac
+++ libquicktime-1.0.0/configure.ac
@@ -7,6 +7,8 @@ LQT_VERSION_MAJOR=`echo $VERSION | cut -
 LQT_VERSION_MINOR=`echo $VERSION | cut -d . -f 2`
 LQT_VERSION_MICRO=`echo $VERSION | cut -d . -f 3 | cut -d p -f 1`
 
+USER_CFLAGS=$CFLAGS
+
 AM_CONFIG_HEADER(config.h)
 
 AC_CANONICAL_HOST
@@ -693,10 +695,15 @@ for i in $lqt_test_cflags; do
   LQT_TRY_CFLAGS($i, COMMON_CFLAGS="$COMMON_CFLAGS $i") ;
 done
 
+if test "x${USER_CFLAGS}" = "x"; then
+
+  dnl Optimizing flags
 
-dnl Optimizing flags
+  LQT_OPT_CFLAGS($host_cpu, ["-O3 -funroll-all-loops -fomit-frame-pointer"])
 
-LQT_OPT_CFLAGS($host_cpu, ["-O3 -funroll-all-loops -fomit-frame-pointer"])
+  CFLAGS="$OPT_CFLAGS"
+
+fi
 
 AH_TEMPLATE([NDEBUG],
             [Causes debug code to e removed])
@@ -705,7 +712,7 @@ if test x$LQT_DEBUG != xtrue; then
 AC_DEFINE(NDEBUG)
 fi
 
-CFLAGS="$OPT_CFLAGS $COMMON_CFLAGS"
+CFLAGS="$CFLAGS $COMMON_CFLAGS"
 
 # -L is required so that linker can find libquicktime when DESTDIR is used.
 # libtool bug, documented at: http://www.geocrawler.com/mail/thread.php3?subject=install+phase+fails&list=404