disable OpenMP by default, i386 optimization problems

configure.ac.in

@@ -637,6 +637,11 @@ dnl
 dnl Check for OpenMP support
 dnl
 
+AC_ARG_ENABLE([openmp],
+	      AC_HELP_STRING([--enable-openmp], [enable if you want OpenMP support @<:@default=no@:>@]),
+	      [want_openmp="$enableval"], [want_openmp=no])
+
+if test x$want_openmp = xyes; then
 	AX_OPENMP([
 	  gcc_version=`$CC -dumpversion`
 	  gcc_major=`echo $gcc_version | sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
@@ -645,9 +650,12 @@ AX_OPENMP([
 	  if test ! "x$GCC" = "xyes" -o $gcc_major -ge 4 -a $gcc_minor -ge 3; then
 	    AC_DEFINE(HAVE_OPENMP,1,[Define if OpenMP is enabled])
 	    CFLAGS="$CFLAGS $OPENMP_CFLAGS"
+	  else
+	    want_openmp=no
 	  fi
 
 	])
+fi
 
 dnl
 dnl Check doc stuff
@@ -777,6 +785,7 @@ $PACKAGE $VERSION configured successfully:
   XMMS2:            $want_xmms2
 
  * General:
+  OpenMP:           $want_openmp
   math:             $want_math
   hddtemp:          $want_hddtemp
   portmon:          $want_portmon