--- ../ffsl.h.orig	2021-11-09 21:28:29.347410128 +0100
+++ ./lib/ffsl.h	2021-11-09 21:28:50.760733519 +0100
@@ -46,47 +46,3 @@
 #if !defined FUNC || !defined TYPE
 # error
 #endif
-
-int
-FUNC (TYPE i)
-{
-#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) \
-    || (__clang_major__ >= 4)
-  return GCC_BUILTIN (i);
-#elif defined _MSC_VER && defined MSVC_BUILTIN
-  /* _BitScanForward, _BitScanForward64
-     <https://docs.microsoft.com/en-us/cpp/intrinsics/bitscanforward-bitscanforward64> */
-  unsigned long bit;
-  if (MSVC_BUILTIN (&bit, i))
-    return bit + 1;
-  else
-    return 0;
-#else
-  unsigned TYPE j = i;
-  /* Split j into chunks, and look at one chunk after the other.  */
-  enum { chunk_bits = CHAR_BIT * sizeof (unsigned int) };
-  /* The number of chunks is ceil (sizeof (TYPE) / sizeof (unsigned int))
-     = (sizeof (TYPE) - 1) / sizeof (unsigned int) + 1. */
-  enum { chunk_count = (sizeof (TYPE) - 1) / sizeof (unsigned int) + 1 };
-
-  if (chunk_count > 1)
-    {
-      size_t k;
-
-      /* It is tempting to write  if (!j)  here, but if we do this,
-         Solaris 10/x86 "cc -O" miscompiles the code.  */
-      if (!i)
-        return 0;
-      /* Unroll the first loop round.  k = 0.  */
-      if ((unsigned int) j)
-        return ffs ((unsigned int) j);
-      /* Generic loop.  */
-      for (k = 1; k < chunk_count - 1; k++)
-        if ((unsigned int) (j >> (k * chunk_bits)) != 0)
-          return k * chunk_bits + ffs ((unsigned int) (j >> (k * chunk_bits)));
-    }
-  /* Last loop round.  k = chunk_count - 1.  */
-  return (chunk_count - 1) * chunk_bits
-         + ffs ((unsigned int) (j >> ((chunk_count - 1) * chunk_bits)));
-#endif
-}