lib/ffi/libc/libc.rb in ffi-libc-0.0.4 vs lib/ffi/libc/libc.rb in ffi-libc-0.0.5

@@ -31,12 +31,17 @@
     attach_function :free, [:pointer], :void
     attach_function :realloc, [:pointer, :size_t], :pointer
     attach_function :getenv, [:string], :string
     attach_function :putenv, [:string], :int
     attach_function :unsetenv, [:string], :int
-    attach_function :clearenv, [], :int
 
+    begin
+      attach_function :clearenv, [], :int
+    rescue FFI::NotFoundError
+      # clearenv is not available on OSX
+    end
+
     # time.h
     attach_function :time, [:pointer], :time_t
 
     # sys/time.h
     attach_function :gettimeofday, [:pointer, :pointer], :int
@@ -50,25 +55,34 @@
     attach_function :bzero, [:pointer, :size_t], :void
     attach_function :memset, [:pointer, :int, :size_t], :pointer
     attach_function :memcpy, [:pointer, :pointer, :size_t], :pointer
     attach_function :memcmp, [:pointer, :pointer, :size_t], :int
     attach_function :memchr, [:pointer, :int, :size_t], :pointer
-    attach_function :memrchr, [:pointer, :int, :size_t], :pointer
+
+    begin
+      attach_function :memrchr, [:pointer, :int, :size_t], :pointer
+    rescue FFI::NotFoundError
+      # memrchr is not available on OSX
+    end
+
     attach_function :strcpy, [:string, :string], :pointer
     attach_function :strncpy, [:string, :string, :size_t], :pointer
     attach_function :strlen, [:string], :size_t
     attach_function :index, [:string, :int], :string
     attach_function :rindex, [:string, :int], :string
     attach_function :strchr, [:string, :int], :string
     attach_function :strrchr, [:string, :int], :string
     attach_function :strstr, [:string, :string], :string
     attach_function :strerror, [:int], :string
-
-    # stdio.h
-    attach_variable :stdin, :pointer
-    attach_variable :stdout, :pointer
-    attach_variable :stderr, :pointer
-
+    
+    begin
+      attach_variable :stdin, :pointer
+      attach_variable :stdout, :pointer
+      attach_variable :stderr, :pointer
+    rescue FFI::NotFoundError
+      # stdin, stdout, stderr are not available on OSX
+    end
+    
     attach_function :fopen, [:string, :string], :FILE
     attach_function :fdopen, [:int, :string], :FILE
     attach_function :freopen, [:string, :string, :FILE], :FILE
     attach_function :fseek, [:FILE, :long, :int], :int
     attach_function :ftell, [:FILE], :long