Updated gr-howto-write-a-block; mostly the .m4 macros and configure.ac.

Also modified pkg.m4 to restore the FOO_INCLUDEDIR functionality and
to add the FOO_CPPFLAGS variable for those times when you want only
the -I, -D and -U flags from FOO_CFLAGS.


git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9362 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 39 insertions, 0 deletions

diff --git a/gr-howto-write-a-block/config/ax_boost_iostreams.m4 b/gr-howto-write-a-block/config/ax_boost_iostreams.m4
new file mode 100644
index 000000000..181b1e752
--- /dev/null
+++ b/gr-howto-write-a-block/config/ax_boost_iostreams.m4
@@ -0,0 +1,39 @@
+#
+# SYNOPSIS
+#
+#   AX_BOOST_IOSTREAMS
+#
+# DESCRIPTION
+#
+#   Test for IOStreams library from the Boost C++ libraries. The macro
+#   requires a preceding call to AX_BOOST_BASE.
+#
+#   This macro calls:
+#
+#     AC_SUBST(BOOST_IOSTREAMS_LIB)
+#
+#   And sets:
+#
+#     HAVE_BOOST_IOSTREAMS
+#
+# COPYLEFT
+#
+#   Copyright (c) 2008 Thomas Porschberg <thomas@randspringer.de>
+#   Copyright (c) 2008 Free Software Foundation, Inc.
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved.
+
+AC_DEFUN([AX_BOOST_IOSTREAMS],
+[
+    AC_REQUIRE([AX_BOOST_BASE])
+    _AX_BOOST_CHECK([boost_iostreams],
+                    [@%:@include <boost/iostreams/filtering_stream.hpp>
+                     @%:@include <boost/range/iterator_range.hpp>],
+                    [std::string  input = "Hello World!";
+                     namespace io = boost::iostreams;
+                     io::filtering_istream  in(boost::make_iterator_range(input));
+                     return 0;])
+
+])