=== cc invocation ===
  Supported targets:
   elf32-x86-64
   elf32-x86-64-freebsd
   elf32-x86-64-nacl
   elf64-x86-64
   elf64-x86-64-freebsd
   elf64-x86-64-nacl
   elf32-iamcu
   elf32-i386
   elf32-i386-freebsd
   elf32-i386-nacl
  Supported emulations:
   elf32_x86_64
   elf32_x86_64_nacl
   elf_x86_64
   elf_x86_64_nacl
   elf_iamcu
   elf_i386
   elf_i386_nacl
COLLECT_GCC_OPTIONS='-O2' '-Wall' '-v' '-o' 'harness' '-mtune=generic' '-march=x86-64'
BUILD_EXIT=0