Merge commit 'v3.3.0' into upstream

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

diff --git a/gr-howto-write-a-block/config/gr_libgnuradio_core_extra_ldflags.m4 b/gr-howto-write-a-block/config/gr_libgnuradio_core_extra_ldflags.m4
new file mode 100644 (file)
index 0000000..43f872c
--- /dev/null
+++ b/gr-howto-write-a-block/config/gr_libgnuradio_core_extra_ldflags.m4
@@ -0,0 +1,40 @@
+# Check for (MinGW)win32 extra ld options.             -*- Autoconf -*-
+
+# Copyright 2003,2004,2005 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+dnl
+AC_DEFUN([GR_LIBGNURADIO_CORE_EXTRA_LDFLAGS], [
+AC_REQUIRE([AC_PROG_LD])
+# on Mingw32 extra LDFLAGS are required to ease global variable linking
+LIBGNURADIO_CORE_EXTRA_LDFLAGS=""
+
+AC_MSG_CHECKING([whether $LD accepts --enable-runtime-pseudo-reloc])
+if ${LD} --enable-runtime-pseudo-reloc --version >/dev/null 2>&1
+then
+        # libtool requires the quotes
+        LIBGNURADIO_CORE_EXTRA_LDFLAGS="\"-Wl,--enable-runtime-pseudo-reloc\""
+        AC_MSG_RESULT(yes)
+else
+        AC_MSG_RESULT(no)
+fi
+
+AC_SUBST(LIBGNURADIO_CORE_EXTRA_LDFLAGS)
+
+])