文件操作 - ax_cxx_header_tr1_unordered_map.m4
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文件: /usr/share/aclocal/ax_cxx_header_tr1_unordered_map.m4
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# ==================================================================================== # https://www.gnu.org/software/autoconf-archive/ax_cxx_header_tr1_unordered_map.html # ==================================================================================== # # SYNOPSIS # # AX_CXX_HEADER_TR1_UNORDERED_MAP # # DESCRIPTION # # Check whether the TR1 include <unordered_map> exists and define # HAVE_TR1_UNORDERED_MAP if it does. # # LICENSE # # Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.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 7 AU_ALIAS([AC_CXX_HEADER_TR1_UNORDERED_MAP], [AX_CXX_HEADER_TR1_UNORDERED_MAP]) AC_DEFUN([AX_CXX_HEADER_TR1_UNORDERED_MAP], [ AC_CACHE_CHECK(for tr1/unordered_map, ax_cv_cxx_tr1_unordered_map, [AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_TRY_COMPILE([#include <tr1/unordered_map>], [using std::tr1::unordered_map;], ax_cv_cxx_tr1_unordered_map=yes, ax_cv_cxx_tr1_unordered_map=no) AC_LANG_RESTORE ]) if test "$ax_cv_cxx_tr1_unordered_map" = yes; then AC_DEFINE(HAVE_TR1_UNORDERED_MAP,,[Define if tr1/unordered_map is present. ]) fi ])
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