文件操作 - ax_cxx_have_valarray.m4
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文件: /usr/share/aclocal/ax_cxx_have_valarray.m4
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# =========================================================================== # https://www.gnu.org/software/autoconf-archive/ax_cxx_have_valarray.html # =========================================================================== # # SYNOPSIS # # AX_CXX_HAVE_VALARRAY # # DESCRIPTION # # If the compiler has valarray<T>, define HAVE_VALARRAY. # # 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 7 AU_ALIAS([AC_CXX_HAVE_VALARRAY], [AX_CXX_HAVE_VALARRAY]) AC_DEFUN([AX_CXX_HAVE_VALARRAY], [AC_CACHE_CHECK(whether the compiler has valarray<T>, ax_cv_cxx_have_valarray, [AC_REQUIRE([AX_CXX_NAMESPACES]) AC_LANG_SAVE AC_LANG_CPLUSPLUS AC_TRY_COMPILE([#include <valarray> #ifdef HAVE_NAMESPACES using namespace std; #endif],[valarray<float> x(100); return 0;], ax_cv_cxx_have_valarray=yes, ax_cv_cxx_have_valarray=no) AC_LANG_RESTORE ]) if test "$ax_cv_cxx_have_valarray" = yes; then AC_DEFINE(HAVE_VALARRAY,,[define if the compiler has valarray<T>]) fi ])
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