These are the first errors occuring:

di.h:82:4: error: unknown type name ‘error’
di.h:82:19: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘/’ token
di.h:143:5: error: unknown type name ‘_fs_size_t’

Then there is a lot more errors after above.

memcpy can't be detected normally due to:
	http://gcc.gnu.org/PR55890

--- a/C/di.h
+++ b/C/di.h
@@ -9,6 +9,8 @@
 
 #include "config.h"
 
+#include <string.h>
+
 /*****************************************************/
 
 #include <stdio.h>
@@ -79,7 +81,7 @@
 
 #if ! _lib_memcpy && ! _define_memcpy
 # if ! _lib_bcopy && ! _define_bcopy
-   #error No_memcpy/bcopy_available.
+   //#error No_memcpy/bcopy_available.
 # else
 #  define memcpy(dst, src, cnt)     (bcopy((src), (dst), (cnt)), dst)
 # endif
@@ -87,7 +89,7 @@
 
 #if ! _lib_memset && ! _define_memset
 # if ! _lib_bzero && ! _define_bzero
-   #error No_memset/bzero_available.
+   //#error No_memset/bzero_available.
 # else
 #  define memset(s,c,n)    (bzero ((s), (n)), s)
 # endif