diff -Naur a/src/md5.c b/src/md5.c
--- src/md5.c
+++ src/md5.c
@@ -25,12 +25,10 @@
 
 #include "md5.h"
 
-#ifdef _LIBC
 # include <endian.h>
 # if __BYTE_ORDER == __BIG_ENDIAN
 #  define WORDS_BIGENDIAN 1
 # endif
-#endif
 
 #if defined(WORDS_BIGENDIAN) || defined(_BIG_ENDIAN)
 # define SWAP(n)							\
diff -Naur a/src/md5.h b/src/md5.h
--- src/md5.h
+++ src/md5.h
@@ -32,42 +32,9 @@
    the resulting executable.  Locally running cross-compiled executables
    is usually not possible.  */
 
-#ifdef _LIBC
 # include <limits.h>
 # include <sys/types.h>
 typedef u_int32_t md5_uint32;
-#else
-# if defined __STDC__ && __STDC__
-#  define UINT_MAX_32_BITS 4294967295U
-# else
-#  define UINT_MAX_32_BITS 0xFFFFFFFF
-# endif
-
-/* If UINT_MAX isn't defined, assume it's a 32-bit type.
-   This should be valid for all systems GNU cares about because
-   that doesn't include 16-bit systems, and only modern systems
-   (that certainly have <limits.h>) have 64+-bit integral types.  */
-
-# ifndef UINT_MAX
-#  define UINT_MAX UINT_MAX_32_BITS
-# endif
-
-# if UINT_MAX == UINT_MAX_32_BITS
-   typedef unsigned int md5_uint32;
-# else
-#  if USHRT_MAX == UINT_MAX_32_BITS
-    typedef unsigned short md5_uint32;
-#  else
-#   if ULONG_MAX == UINT_MAX_32_BITS
-     typedef unsigned long md5_uint32;
-#   else
-     /* The following line is intended to evoke an error.
-        Using #error is not portable enough.  */
-     "Cannot determine unsigned 32-bit data type."
-#   endif
-#  endif
-# endif
-#endif
 
 /* Structure to save state of computation between the single steps.  */
 struct md5_ctx