Merge branch 'dfsg-orig'

[debian/gnuradio] / gr-howto-write-a-block / config / gr_check_shm_open.m4

diff --git a/gr-howto-write-a-block/config/gr_check_shm_open.m4 b/gr-howto-write-a-block/config/gr_check_shm_open.m4
new file mode 100644 (file)
index 0000000..83d260b
--- /dev/null
+++ b/gr-howto-write-a-block/config/gr_check_shm_open.m4
@@ -0,0 +1,29 @@
+dnl
+dnl Copyright 2003 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 3, 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., 51 Franklin Street,
+dnl Boston, MA 02110-1301, USA.
+
+AC_DEFUN([GR_CHECK_SHM_OPEN],
+[
+  SHM_OPEN_LIBS=""
+  save_LIBS="$LIBS"
+  AC_SEARCH_LIBS([shm_open], [rt], [SHM_OPEN_LIBS="$LIBS"])
+  AC_CHECK_FUNCS([shm_open])
+  LIBS="$save_LIBS"
+  AC_SUBST(SHM_OPEN_LIBS)
+])