Simplify cli_main

ports/tcl/build.sh

 # Copyright (c) 2014 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 NACL_CONFIGURE_PATH=${SRC_DIR}/unix/configure
 
 NACLPORTS_CPPFLAGS="-Dmain=nacl_main"
 
 export LIBS+="\
   -Wl,--undefined=nacl_main ${NACL_CLI_MAIN_LIB} \
   -lppapi_simple -lnacl_io -lppapi -lppapi_cpp -l${NACL_CPP_LIB}"
 
 MAKE_TARGETS="binaries"
 INSTALL_TARGETS="install-binaries"
 
 # Disable fallbacks for broken libc's that kick in for
 # cross-compiles since autoconf can't run target binaries.
 # The fallbacks seem to be non-general.
 export tcl_cv_strtod_buggy=ok
 export ac_cv_func_strtod=yes
+export ac_cv_func_memmove=yes
 export tcl_cv_strtod_unbroken=ok
 
 # Prevent non-cross compile clean parts of the build from assuming the host
 # system influences things (needed for OSX).
 export tcl_cv_sys_version=Generic
 
 if [ "${NACL_LIBC}" = "glibc" ]; then
   NACLPORTS_CFLAGS+=" -fPIC"
 fi
 
 if [ "${NACL_LIBC}" = "newlib" ]; then
   NACLPORTS_CPPFLAGS+=" -I${NACLPORTS_INCLUDE}/glibc-compat"
   NACLPORTS_CPPFLAGS+=" -DHAVE_STRLCPY=1"
   EXTRA_CONFIGURE_ARGS+=" --enable-shared=no"
   EXTRA_CONFIGURE_ARGS+=" --enable-load=no"
   export tcl_cv_strtoul_unbroken=ok
   LIBS+=" -lglibc-compat"
 fi
 
 if [ "${NACL_LIBC}" = "bionic" ]; then
   NACLPORTS_CPPFLAGS+=" -DHAVE_STRLCPY=1"
 fi