Merge pull request #61 from zerosign/master

Forget to add the flag in ext/scrypt/Rakefile

Author: stakach

ext/scrypt/Rakefile

@@ -4,6 +4,7 @@ FFI::Compiler::CompileTask.new('scrypt_ext') do |t|
   t.cflags << "-Wall -std=c99"
   t.cflags << "-msse -msse2" if t.platform.arch.include? "86"
   t.cflags << "-D_GNU_SOURCE=1" if RbConfig::CONFIG["host_os"].downcase =~ /mingw/
+  t.cflags << "-D__need_timespec" if RbConfig::CONFIG['host_os'].downcase =~ /linux/
   t.cflags << "-arch x86_64 -arch i386" if t.platform.mac?
   t.ldflags << "-arch x86_64 -arch i386" if t.platform.mac?
   t.export '../../lib/scrypt/scrypt_ext.rb'