AX_CXX_HAVE_REF()
This macro checks if std::ref, added in C++11, is defined in the <functional> header.
If it is, define the ax_cv_cxx_have_ref environment variable to "yes" and define HAVE_CXX_REF.
Download the latest version of ax_cxx_have_ref.m4 or browse the macro’s revision history.
Copyright © 2014 Enrico M. Crisostomo enrico.m.crisostomo@gmail.com
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. This file is offered as-is, without any warranty.