clang -fexceptions -O -fno-omit-frame-pointer -fno-strict-aliasing -Wall -msse -msse2 -arch x86_64 -arch i386  -o x86_64-darwin/crypto_scrypt-sse.o -c ./crypto_scrypt-sse.c
clang -fexceptions -O -fno-omit-frame-pointer -fno-strict-aliasing -Wall -msse -msse2 -arch x86_64 -arch i386  -o x86_64-darwin/memlimit.o -c ./memlimit.c
clang -fexceptions -O -fno-omit-frame-pointer -fno-strict-aliasing -Wall -msse -msse2 -arch x86_64 -arch i386  -o x86_64-darwin/scrypt_calibrate.o -c ./scrypt_calibrate.c
clang -fexceptions -O -fno-omit-frame-pointer -fno-strict-aliasing -Wall -msse -msse2 -arch x86_64 -arch i386  -o x86_64-darwin/scrypt_ext.o -c ./scrypt_ext.c
clang -fexceptions -O -fno-omit-frame-pointer -fno-strict-aliasing -Wall -msse -msse2 -arch x86_64 -arch i386  -o x86_64-darwin/scryptenc_cpuperf.o -c ./scryptenc_cpuperf.c
clang -fexceptions -O -fno-omit-frame-pointer -fno-strict-aliasing -Wall -msse -msse2 -arch x86_64 -arch i386  -o x86_64-darwin/sha256.o -c ./sha256.c
clang -bundle -o x86_64-darwin/libscrypt_ext.bundle x86_64-darwin/crypto_scrypt-sse.o x86_64-darwin/memlimit.o x86_64-darwin/scrypt_calibrate.o x86_64-darwin/scrypt_ext.o x86_64-darwin/scryptenc_cpuperf.o x86_64-darwin/sha256.o -fexceptions -arch x86_64 -arch i386 
ld: warning: ignoring file /nix/store/1gi5k4v4hibqwx2y7wlxrijnmh269agh-Libsystem-osx-10.11.6/lib/libSystem.dylib, file was built for x86_64 which is not the architecture being linked (i386): /nix/store/1gi5k4v4hibqwx2y7wlxrijnmh269agh-Libsystem-osx-10.11.6/lib/libSystem.dylib
Undefined symbols for architecture i386:
  "___error", referenced from:
      _crypto_scrypt in crypto_scrypt-sse.o
      _memtouse in memlimit.o
  "___stack_chk_fail", referenced from:
      _memtouse in memlimit.o
      _calibrate in scrypt_calibrate.o
      _scryptenc_cpuperf in scryptenc_cpuperf.o
      _scrypt_SHA256_Transform in sha256.o
      _scrypt_SHA256_Final in sha256.o
      _HMAC_scrypt_SHA256_Init in sha256.o
      _HMAC_scrypt_SHA256_Final in sha256.o
      ...
  "___stack_chk_guard", referenced from:
      _memtouse in memlimit.o
      _calibrate in scrypt_calibrate.o
      _scryptenc_cpuperf in scryptenc_cpuperf.o
      _scrypt_SHA256_Transform in sha256.o
      _scrypt_SHA256_Final in sha256.o
      _HMAC_scrypt_SHA256_Init in sha256.o
      _HMAC_scrypt_SHA256_Final in sha256.o
      ...
      _memtouse in memlimit.o
      _calibrate in scrypt_calibrate.o
      _scryptenc_cpuperf in scryptenc_cpuperf.o
      _scrypt_SHA256_Transform in sha256.o
      _scrypt_SHA256_Final in sha256.o
      _HMAC_scrypt_SHA256_Init in sha256.o
      _HMAC_scrypt_SHA256_Final in sha256.o
      ...
      _memtouse in memlimit.o
      _calibrate in scrypt_calibrate.o
      _scryptenc_cpuperf in scryptenc_cpuperf.o
      _scrypt_SHA256_Transform in sha256.o
      _scrypt_SHA256_Final in sha256.o
      _HMAC_scrypt_SHA256_Init in sha256.o
      _HMAC_scrypt_SHA256_Final in sha256.o
      ...
      _memtouse in memlimit.o
      _calibrate in scrypt_calibrate.o
      _scryptenc_cpuperf in scryptenc_cpuperf.o
      _scrypt_SHA256_Transform in sha256.o
      _scrypt_SHA256_Final in sha256.o
      _HMAC_scrypt_SHA256_Init in sha256.o
      _HMAC_scrypt_SHA256_Final in sha256.o
      ...
  "_free", referenced from:
      _crypto_scrypt in crypto_scrypt-sse.o
  "_getrlimit$UNIX2003", referenced from:
      _memtouse in memlimit.o
  "_gettimeofday", referenced from:
      _scryptenc_cpuperf in scryptenc_cpuperf.o
  "_malloc", referenced from:
      _crypto_scrypt in crypto_scrypt-sse.o
  "_memcpy", referenced from:
      _scrypt_SHA256_Update in sha256.o
      _PBKDF2_scrypt_SHA256 in sha256.o
  "_mmap$UNIX2003", referenced from:
      _crypto_scrypt in crypto_scrypt-sse.o
  "_munmap$UNIX2003", referenced from:
      _crypto_scrypt in crypto_scrypt-sse.o
  "_sysconf", referenced from:
      _memtouse in memlimit.o
ld: symbol(s) not found for architecture i386
clang-3.7: error: linker command failed with exit code 1 (use -v to see invocation)
rake aborted!
Command failed with status (1): [clang -bundle -o x86_64-darwin/libscrypt_e...]
/nix/store/5y5jr6a53hw8837852vplcjv8apak5sl-ruby2.3.1-ffi-compiler-0.1.3/lib/ruby/gems/2.3.0/gems/ffi-compiler-0.1.3/lib/ffi-compiler/compile_task.rb:131:in `block in define_task!'
/nix/store/j8grv0gb9ccr0q2fq4zc45kwg5kps2ri-ruby2.3.1-rake-11.2.2/lib/ruby/gems/2.3.0/gems/rake-11.2.2/exe/rake:27:in `<main>'
Tasks: TOP => default => x86_64-darwin/libscrypt_ext.bundle
(See full trace by running task with --trace)

rake failed, exit code 1