文件操作 - ax_cxx_templates.m4
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文件: /usr/share/aclocal/ax_cxx_templates.m4
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# =========================================================================== # https://www.gnu.org/software/autoconf-archive/ax_cxx_templates.html # =========================================================================== # # SYNOPSIS # # AX_CXX_TEMPLATES # # DESCRIPTION # # If the compiler supports basic templates, define HAVE_TEMPLATES. # # LICENSE # # Copyright (c) 2008 Todd Veldhuizen # Copyright (c) 2008 Luc Maisonobe <luc@spaceroots.org> # # 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 8 AU_ALIAS([AC_CXX_TEMPLATES], [AX_CXX_TEMPLATES]) AC_DEFUN([AX_CXX_TEMPLATES], [dnl AC_CACHE_CHECK([whether the compiler supports basic templates], [ax_cv_cxx_templates], [AC_LANG_PUSH([C++]) AC_COMPILE_IFELSE([dnl AC_LANG_PROGRAM([ template<class T> class A {public:A(){};}; template<class T> void f(const A<T>& ){}; ], [A<double> d; A<int> i; f(d); f(i); return 0;])], [ax_cv_cxx_templates=yes], [ax_cv_cxx_templates=no]) AC_LANG_POP([C++]) ]) AS_IF([test "X$ax_cv_cxx_templates" = "Xyes"], [AC_DEFINE(HAVE_TEMPLATES,,[define if the compiler supports basic templates])]) ])
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