Can't make automake to use C++11

I'm working on some project and it seems that I can't make automake script to use C++11.

In rootdir of my project I have file Makefile.am which look like this (it was automade by eclipse):

SUBDIRS=src

Then in /rootdir/src I have Makefile.am that looks like this:

AM_CXXFLAGS=-Wall -fPIC -std=gnu++11 -DVERSION=\"$(VERSION)\" -DPROG="\"$(PACKAGE)\""

bin_PROGRAMS = algatorc
algatorc_SOURCES = algatorc.cpp
include_HEADERS = Timer.hpp TestSetIterator.hpp TestCase.hpp ETestSet.hpp EParameter.hpp Entity.hpp ParameterSet.hpp AbsAlgorithm.hpp Log.hpp JSON.hpp JSONValue.hpp

lib_LIBRARIES = libAlgatorc.a
libAlgatorc_a_SOURCES = ParameterSet.cpp TestCase.cpp EParameter.cpp ETestSet.cpp TestSetIterator.cpp Entity.cpp Timer.cpp JSON.cpp JSONValue.cpp AbsAlgorithm.cpp
algatorc_LDADD=libAlgatorc.a

So, I added -std=gnu++11 for C++11 support but I still get this error:

g++ -DPACKAGE_NAME=\"algatorc\" -DPACKAGE_TARNAME=\"algatorc\" -DPACKAGE_VERSION=\"1.0\" -DPACKAGE_STRING=\"algatorc\ 1.0\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"algatorc\" -DVERSION=\"1.0\" -I.     -g -O2 -MT algatorc.o -MD -MP -MF .deps/algatorc.Tpo -c -o algatorc.o algatorc.cpp
In file included from /usr/include/c++/4.8/thread:35:0,
                 from Log.hpp:281,
                 from algatorc.cpp:18:
/usr/include/c++/4.8/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental, and must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
 #error This file requires compiler and library support for the \
  ^

And from this error I can see that g++ doesn't use -Wall -fPIC -std=gnu++11 but I don't see why. It's using something completely else. This is my configure.ac script which is located in rootdir of my project

AC_PREREQ([2.69])
AC_INIT([algatorc], [0.1], [my_mail])
AC_CONFIG_SRCDIR([src/TestCase.hpp])
#AC_CONFIG_HEADERS([config.h])

LT_INIT
AM_INIT_AUTOMAKE

# Checks for programs.

AC_PROG_CXX

# Checks for libraries.

# Checks for header files.
AC_CHECK_HEADERS([stdlib.h string.h sys/time.h unistd.h wchar.h wctype.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_CHECK_HEADER_STDBOOL
AC_C_INLINE
AC_TYPE_SIZE_T

# Checks for library functions.
AC_FUNC_MALLOC
AC_FUNC_MKTIME
AC_CHECK_FUNCS([gettimeofday memset mkdir])

LIBS=-ldl

AC_CONFIG_FILES([Makefile])
AC_OUTPUT

I have also tried to add AX_CXX_COMPILE_STDCXX_11 to configure.ac script but error still occurs. Any idea how to fix this?

I am using Ubuntu 12.04 x64, and Eclipse (Version: Mars Release (4.5.0))