Houston, we have a trunk.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3122 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 33 insertions, 0 deletions

diff --git a/gr-howto-write-a-block/config/gr_require_mc4020.m4 b/gr-howto-write-a-block/config/gr_require_mc4020.m4
new file mode 100644
index 000000000..8a03eeb6c
--- /dev/null
+++ b/gr-howto-write-a-block/config/gr_require_mc4020.m4
@@ -0,0 +1,33 @@
+dnl
+dnl Copyright 2003,2004 Free Software Foundation, Inc.
+dnl 
+dnl This file is part of GNU Radio
+dnl 
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 2, or (at your option)
+dnl any later version.
+dnl 
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING.  If not, write to
+dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+dnl Boston, MA 02111-1307, USA.
+dnl 
+
+AC_DEFUN([GR_REQUIRE_MC4020],[
+  AC_MSG_CHECKING([for mc4020 A/D driver include file])
+  AC_COMPILE_IFELSE([
+#include <mc4020.h>
+int main (int argc, char **argv)
+{ 
+    return 0;
+}
+],[AC_MSG_RESULT([yes])],
+  [AC_MSG_RESULT([no])
+  AC_MSG_ERROR([mc4020.h not found.])])
+])