diff --git a/autoconf/configure.ac b/autoconf/configure.ac index 1b9555f25d2..018321591c2 100644 --- a/autoconf/configure.ac +++ b/autoconf/configure.ac @@ -592,12 +592,12 @@ esac dnl --enable-cxx11 : check whether or not to use -std=c++11 on the command line AC_ARG_ENABLE(cxx11, AS_HELP_STRING([--enable-cxx11], - [Use c++11 if available (default is NO)]),, + [Use c++11 if available (default is YES)]),, enableval=default) case "$enableval" in yes) AC_SUBST(ENABLE_CXX11,[1]) ;; no) AC_SUBST(ENABLE_CXX11,[0]) ;; - default) AC_SUBST(ENABLE_CXX11,[0]);; + default) AC_SUBST(ENABLE_CXX11,[1]);; *) AC_MSG_ERROR([Invalid setting for --enable-cxx11. Use "yes" or "no"]) ;; esac diff --git a/configure b/configure index 57cf95d638f..deab9899d95 100755 --- a/configure +++ b/configure @@ -1402,7 +1402,7 @@ Optional Features: --enable-compiler-version-checks Check the version of the host compiler (default is YES) - --enable-cxx11 Use c++11 if available (default is NO) + --enable-cxx11 Use c++11 if available (default is YES) --enable-split-dwarf Use split-dwarf if available (default is NO) --enable-clang-arcmt Enable building of clang ARCMT (default is YES) --enable-clang-static-analyzer @@ -4816,7 +4816,7 @@ case "$enableval" in ;; no) ENABLE_CXX11=0 ;; - default) ENABLE_CXX11=0 + default) ENABLE_CXX11=1 ;; *) { { echo "$as_me:$LINENO: error: Invalid setting for --enable-cxx11. Use \"yes\" or \"no\"" >&5 echo "$as_me: error: Invalid setting for --enable-cxx11. Use \"yes\" or \"no\"" >&2;}