How to build glibc library with specific gcc version

On my system default gcc version is 4.4.7 , But i want to build glib library with gcc 6.3 version. For that i tried running ./configure from glib source as shown below:

../configure  CC="/version/global/pkgs/gcc/v6.3.0/bin/gcc" CFLAGS='-fPIC' CXXFLAGS='-fPIC' --enable-static=yes --prefix=/home/kallel/glib_63/glib-2.56.1/new_glib63 --enable-libmount=no --with-pcre=/home/kallel/pcre_lib/pcre-8.20/pcre_library

Once after building glib library. To see on which gcc compiler version it got built with following command:-

strings -a libglib-2.0.so.0.5600.1 | grep "GCC: ("
o/p:-
 GCC: (GNU) 4.4.7 20120313 (Red Hat 4.4.7-9)
 GCC: (Synopsis) 6.3.0
 GCC: (GNU) 4.4.7 20120313 (Red Hat 4.4.7-4)

I could not understand why it is still showing output with 4.4.7, Please help me in understanding the output. Is there anything wrong in my ./configure command? How do we make sure that library was built with gcc 6.3