文件操作 - ax_cxx_have_bit_or.m4
返回文件管理
返回主菜单
删除本文件
文件: /usr/share/aclocal/ax_cxx_have_bit_or.m4
编辑文件内容
# =========================================================================== # https://www.gnu.org/software/autoconf-archive/ax_cxx_have_bit_or.html # =========================================================================== # # SYNOPSIS # # AX_CXX_HAVE_BIT_OR() # # DESCRIPTION # # This macro checks if std::bit_or, added in C++11, is defined in the # <functional> header. # # If it is, define the ax_cv_cxx_have_bit_or environment variable to "yes" # and define HAVE_CXX_BIT_OR. # # 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_BIT_OR], [AC_CACHE_CHECK( [for std::bit_or in functional], ax_cv_cxx_have_bit_or, [dnl AC_LANG_PUSH([C++]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM( [ [#include <functional>] [using std::bit_or;] ], [] )], [ax_cv_cxx_have_bit_or=yes], [ax_cv_cxx_have_bit_or=no] ) AC_LANG_POP([C++])]) if test x"$ax_cv_cxx_have_bit_or" = "xyes" then AC_DEFINE(HAVE_CXX_BIT_OR, 1, [Define if functional defines the std::bit_or class.]) fi ])
修改文件时间
将文件时间修改为当前时间的前一年
删除文件