Merge branch 'master' of gnuradio.org:gnuradio

1 files changed, 44 insertions, 0 deletions

diff --git a/volk/config/gr_no_undefined.m4 b/volk/config/gr_no_undefined.m4
new file mode 100644
index 000000000..c8d745d5f
--- /dev/null
+++ b/volk/config/gr_no_undefined.m4
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+dnl
+dnl Copyright 2005 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.
+dnl 
+
+# GR_NO_UNDEFINED()
+#
+# Detemine whether we need to use the -no-undefined linker flag
+# when building shared libraries.  
+# Sets NO_UNDEFINED to "" or "-no-undefined"
+# 
+# As far as I can tell, we need -no-undefined only when building
+# windows DLLs.  This occurs when using MinGW and Cygwin.
+#
+# For now, we stub this out.
+
+AC_DEFUN([GR_NO_UNDEFINED],[
+	AC_REQUIRE([AC_CANONICAL_HOST])
+	no_undefined=""
+	case "${host_os}" in
+		*mingw* | *cygwin*)
+
+		# on MinGW/Cygwin extra LDFLAGS are required
+		no_undefined="-no-undefined"
+		;;
+	esac
+	AC_SUBST(NO_UNDEFINED,[$no_undefined])
+])