Initial checkin for VOLK - Vector-Optimized Library of Kernels. This is a new SIMD library.

It currently stands by itself under the GNU Radio tree and can be used separately. We will integrate the build process into GNU Raio and start building off of its functionality over time.

1 files changed, 67 insertions, 0 deletions

diff --git a/volk/config/lf_cxx.m4 b/volk/config/lf_cxx.m4
new file mode 100644
index 000000000..dfc6bfbfe
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+++ b/volk/config/lf_cxx.m4
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+dnl Autoconf support for C++
+dnl Copyright (C) 1988 Eleftherios Gkioulekas <lf@amath.washington.edu>
+dnl  
+dnl This program 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 of the License, or
+dnl (at your option) any later version.
+dnl 
+dnl This program 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 this program; if not, write to the Free Software 
+dnl Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301, USA.
+dnl 
+dnl As a special exception to the GNU General Public License, if you 
+dnl distribute this file as part of a program that contains a configuration 
+dnl script generated by Autoconf, you may include it under the same 
+dnl distribution terms that you use for the rest of that program.
+
+# -----------------------------------------------------------------
+# This macro should be called to configure your C++ compiler.
+# When called, the macro does the following things:
+# 1. It finds an appropriate C++ compiler
+#    If you passed the flag --with-cxx=foo, then it uses that
+#    particular compiler
+# 2. Checks whether the compiler accepts the -g 
+# ------------------------------------------------------------------
+
+AC_DEFUN([LF_CONFIGURE_CXX],[
+ AC_REQUIRE([AC_PROG_CXX])dnl
+ AC_REQUIRE([AC_PROG_CXXCPP])dnl
+ LF_CXX_PORTABILITY
+])
+
+# -----------------------------------------------------------------------
+# This macro tests the C++ compiler for various portability problem.
+# -----------------------------------------------------------------------
+
+
+AC_DEFUN([LF_CXX_PORTABILITY],[
+
+  dnl
+  dnl Check for common C++ portability problems
+  dnl
+
+  dnl AC_LANG_PUSH
+  dnl AC_LANG_CPLUSPLUS
+  AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+
+
+  dnl Test whether C++ has std::isnan
+  AC_MSG_CHECKING(whether C++ has std::isnan)
+  AC_TRY_COMPILE([#include <cmath>], [
+   std::isnan(0);
+], [ AC_MSG_RESULT(yes)
+	AC_DEFINE(CXX_HAS_STD_ISNAN,[],[Define if has std::isnan]) ],
+   [ AC_MSG_RESULT(no) ])
+
+  dnl Done with the portability checks
+  dnl AC_LANG_POP([C++])
+  AC_LANG_RESTORE
+])
+