文件操作 - ax_cxx_have_bind.m4
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文件: /usr/share/aclocal/ax_cxx_have_bind.m4
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# =========================================================================== # https://www.gnu.org/software/autoconf-archive/ax_cxx_have_bind.html # =========================================================================== # # SYNOPSIS # # AX_CXX_HAVE_BIND() # # DESCRIPTION # # This macro checks if std::bind, added in C++11, is defined in the # <functional> header. # # If it is, define the ax_cv_cxx_have_bind environment variable to "yes" # and define HAVE_CXX_BIND. # # LICENSE # # Copyright (c) 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. #serial 3 AC_DEFUN([AX_CXX_HAVE_BIND], [AC_CACHE_CHECK( [for std::bind in functional], ax_cv_cxx_have_bind, [dnl AC_LANG_PUSH([C++]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM( [ [#include <functional>] [using namespace std;] [int fn(int x, int y) { return x + y; }] ], [ [auto bound_fn = bind(fn,1,2);] [bound_fn();] ] )], [ax_cv_cxx_have_bind=yes], [ax_cv_cxx_have_bind=no] ) AC_LANG_POP([C++])]) if test x"$ax_cv_cxx_have_bind" = "xyes" then AC_DEFINE(HAVE_CXX_BIND, 1, [Define if functional defines the std::bind class.]) fi ])
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