--- np2/x11/configure.ac	2012/01/22 21:23:43	1.19
+++ np2/x11/configure.ac	2012/01/24 18:17:47	1.22
@@ -4,9 +4,9 @@ dnl
 
 dnl require autoconf 2.59
 AC_PREREQ(2.59)
-AC_REVISION($Revision: 1.19 $)
+AC_REVISION($Revision: 1.22 $)
 
-AC_INIT(Xnp2,0.83-20120122,nonakap@gmail.com,xnp2)
+AC_INIT(Xnp2,0.83-20120124,nonakap@gmail.com,xnp2)
 AM_INIT_AUTOMAKE([no-define no-dist no-installinfo subdir-objects])
 AC_CONFIG_SRCDIR([../np2ver.h])
 AC_CONFIG_HEADERS(config.h)
@@ -46,9 +46,7 @@ AC_SYS_LARGEFILE
 dnl
 dnl Check GCC
 dnl
-if test x"$GCC" != "xyes"; then
-    AC_MSG_ERROR(This package required GCC.)
-fi
+AM_CONDITIONAL(HAVE_GCC,test x"$GCC" = "xyes")
 
 dnl
 dnl Checks for library functions.
@@ -150,6 +148,15 @@ if test x"$enable_xf86vidmode" = "xyes";
 fi
 
 dnl
+dnl Checks for nasm
+dnl
+AC_CHECK_PROGS(nasm,[nasm nasmw],no)
+AM_CONDITIONAL(HAVE_NASM,test x$"nasm" != "xno")
+if test x"$nasm" != "xno"; then
+  AC_DEFINE(HAVE_NASM,,[Define if have nasm])
+fi
+
+dnl
 dnl Checks for IA-32 CPU emulation
 dnl
 AC_MSG_CHECKING([whether to use IA-32 emulation])