dnl file : m4/cxx11.m4 dnl copyright : Copyright (c) 2009-2015 Code Synthesis Tools CC dnl license : GNU GPL v2; see accompanying LICENSE file dnl dnl CXX11(MACRO, DESCRIPTION) dnl dnl Check if we are compiling in the C++11 mode. If we are, define MACRO as dnl both a macro and conditional as well as set the cxx11 variable to 'yes'. dnl AC_DEFUN([CXX11], [ cxx11=no AC_MSG_CHECKING([whether we are in C++11 mode]) CXX_LIBTOOL_LINK_IFELSE([ AC_LANG_SOURCE([ #include <memory> int main () { std::shared_ptr<int> p (new int (10)); *p = 11; } ])], [cxx11=yes]) if test x"$cxx11" = xyes; then AC_MSG_RESULT([yes]) AC_DEFINE([$1], [1], [$2]) else AC_MSG_RESULT([no]) fi AM_CONDITIONAL([$1], [test x$cxx11 = xyes]) ])dnl