+ * incompatible change: External-format support for FFI calls. The
+ SB-ALIEN:C-STRING no longer implies an ASCII
+ external-format. Instead the string is subject to external-format
+ conversion. Additionally return values of type SB-ALIEN:C-STRING
+ are by default of type (SIMPLE-ARRAY CHARACTER), not
+ SIMPLE-BASE-STRING. For an alien type that behaves like the old
+ SB-ALIEN:C-STRING type, use (SB-ALIEN:C-STRING :EXTERNAL-FORMAT
+ :ASCII :ELEMENT-TYPE BASE-CHAR). (thanks to Yaroslav Kavenchuk)