Non-SFI Mode: Add nonsfi_loader and plumbing to test it

pnacl/build.sh

 #!/bin/bash
 # Copyright (c) 2012 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.
 #
 #@                 PNaCl toolchain build script
 #@-------------------------------------------------------------------
 #@ This script builds the ARM and PNaCl untrusted toolchains.
 #@ It MUST be run from the native_client/ directory.
 ######################################################################
@@ skipping 2450 matching lines @@
   ${PNACL_AR} rc "${destdir}"/libcrt_platform.a "${tmpdir}"/*.o
 }
 
 libs-support-unsandboxed() {
   if ${BUILD_PLATFORM_LINUX} || ${BUILD_PLATFORM_MAC}; then
     local arch="x86-32-${BUILD_PLATFORM}"
     StepBanner "LIBS-SUPPORT (${arch})" "Install unsandboxed_irt.o"
     local destdir="${INSTALL_LIB_NATIVE}"${arch}
     mkdir -p ${destdir}
     # The NaCl headers insist on having a platform macro such as
-    # NACL_LINUX defined, but unsandboxed_irt.c does not itself use
-    # any of these macros, so defining NACL_LINUX here even on
-    # non-Linux systems is OK.
-    gcc -m32 -O2 -Wall -Werror -I${NACL_ROOT}/.. -DNACL_LINUX=1 -c \
-        ${PNACL_SUPPORT}/unsandboxed_irt.c -o ${destdir}/unsandboxed_irt.o
+    # NACL_LINUX defined, but nonsfi/irt/irt_interfaces.c does not
+    # itself use any of these macros, so defining NACL_LINUX here even
+    # on non-Linux systems is OK.
+    gcc -m32 -O2 -Wall -Werror -I${NACL_ROOT}/.. -c \
+        -DNACL_LINUX=1 -DDEFINE_MAIN \
+        ${NACL_ROOT}/src/nonsfi/irt/irt_interfaces.c \
+        -o ${destdir}/unsandboxed_irt.o
   fi
 }
 
 
 # Build the dummy "libpnacl_irt_shim.a", which is useful for building
 # commandline programs.  It cannot be used to build PPAPI programs
 # because it does not actually shim the PPAPI interfaces.
 # The library is named the same as the real PPAPI shim to ensure that
 # the commandlines are the same.
 # This must be built after newlib(), since it uses headers like <stdint.h>.
@@ skipping 863 matching lines @@
 
 if [ "$(type -t $1)" != "function" ]; then
   #Usage
   echo "ERROR: unknown function '$1'." >&2
   echo "For help, try:"
   echo "    $0 help"
   exit 1
 fi
 
 "$@"