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Modules: Packsnap

Instance Method Summary collapse

Instance Method Details

#try_configure ⇒ Object 



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# File 'ext/packsnap/extconf.rb', line 11

def try_configure
  return if system "./configure --disable-option-checking --disable-dependency-tracking --disable-gtest --without-gflags"

  if try_run 'int main(int argc, char** argv){ return __builtin_expect(1, 1) ? 0 : 1; }'
    $defs << '-DHAVE_BUILTIN_EXPECT'
  end

  if try_run 'int main(int argc, char** argv){ return (__builtin_ctzll(0x100000000LL) == 32) ? 0 : 1; }'
    $defs << '-DHAVE_BUILTIN_CTZ'
  end

  have_header("ruby/st.h")
  have_header("st.h")
  have_header 'dlfcn.h'
  have_header 'inttypes.h'
  have_header 'memory.h'
  have_header 'stddef.h'
  have_header 'stdint.h'
  have_header 'stdlib.h'
  have_header 'strings.h'
  have_header 'string.h'
  have_header 'sys/byteswap.h'
  have_header 'sys/endian.h'
  have_header 'sys/mman.h'
  have_header 'sys/resource.h'
  have_header 'sys/stat.h'
  have_header 'sys/types.h'
  have_header 'unistd.h'
  have_header 'windows.h'

  if try_run 'int main(int argc, char** argv){ int i = 1; return *((char*)&i); }'
    $defs << '-DWORDS_BIGENDIAN'
  end
end