fix memcpy (#196)

Author: chrstphrbrns

Project.toml

@@ -1,7 +1,7 @@
 name = "TiffImages"
 uuid = "731e570b-9d59-4bfa-96dc-6df516fadf69"
 authors = ["Tamas Nagy <github@tamasnagy.com>"]
-version = "0.11.7"
+version = "0.11.8"
 
 [deps]
 ColorTypes = "3da002f7-5984-5a60-b8a6-cbb66c0b333f"

src/utils.jl

@@ -147,6 +147,12 @@ else
     const _safe_open = open
 end
 
-function memcpy(dest::Ptr{T}, src::Ptr{T}, n::Int) where T
-    ccall(:memcpy, Ptr{T}, (Ptr{T}, Ptr{T}, Int), dest, src, n)
-end
+@static if isdefined(Base, :memcpy)
+    function memcpy(dest::Ptr{T}, src::Ptr{T}, n::Int) where T
+        Base.memcpy(dest, src, n)
+    end
+else
+    function memcpy(dest::Ptr{T}, src::Ptr{T}, n::Int) where T
+        ccall(:memcpy, Ptr{T}, (Ptr{T}, Ptr{T}, Int), dest, src, n)
+    end
+end