Change startup ABI for untrusted code to be C-compatible

tools/llvm/driver/pnacl-gcc.py

 #!/usr/bin/python
 # Copyright (c) 2011 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.
 #
 # IMPORTANT NOTE: If you make local mods to this file, you must run:
 #   %  tools/llvm/utman.sh driver
 # in order for them to take effect in the scons build.  This command
 # updates the copy in the toolchain/ tree.
 #
@@ skipping 104 matching lines @@
   'EMUL'        : '${EMUL_%ARCH%}',
   'EMUL_ARM'    : 'armelf_nacl',
   'EMUL_X8632'  : 'elf_nacl',
   'EMUL_X8664'  : 'elf64_nacl',
 
   # ${ld_inputs} signifies where to place the objects and libraries
   # provided on the command-line.
   'LD_ARGS_nostdlib': '-barebones-link ${ld_inputs}',
 
   'LD_ARGS_newlib_static':
-    '-static ${LIBS}/crt1.o ${LIBS_BC}/nacl_startup.bc ${ld_inputs} ' +
+    '-static ${LIBS_BC}/crt1.bc ${LIBS_BC}/nacl_startup.bc ${ld_inputs} ' +
     '--start-group -lgcc_eh -lgcc -lehsupport -lc -lnacl ' +
     '${LIBSTDCPP} ${LIBS}/libcrt_platform.a --end-group',
 
   # The next three are copied verbatim from nacl-gcc
   'LD_ARGS_glibc_static':
     '-T ${LIBS}/${EMUL}.x.static ' +
     '${LIBS}/crt1.o ${LIBS}/crti.o ${LIBS}/crtbeginT.o ' +
     '${ld_inputs} ${LIBSTDCPP} ' +
     '--start-group -lgcc -lgcc_eh -lehsupport -lc ' +
     '--end-group ${LIBS}/crtend.o ${LIBS}/crtn.o',
@@ skipping 375 matching lines @@
     chain.add(RunNativeAS, 'o')
     cur_type = 'o'
   if cur_type == output_type:
     return
 
   Log.Fatal("Unable to compile .%s to .%s", input_type, output_type)
 
 
 if __name__ == "__main__":
   DriverMain(main)