use string.h functions in newlib (-lc)

configure

@@ -3955,6 +3955,8 @@ CFLAGS="-Wall -Os -std=gnu99 -Wno-unused"
 
 LIBS="-lgcc"
 
+LIBS="-lc"
+
 
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: adding default configure arg: --host=riscv" >&5

configure.ac

@@ -73,6 +73,7 @@ AC_HEADER_STDC
 
 AC_SUBST([CFLAGS],  ["-Wall -Os -std=gnu99 -Wno-unused"])
 AC_SUBST([LIBS],  ["-lgcc"])
+AC_SUBST([LIBS],  ["-lc"])
 
 AX_DEFAULT_CONFIGURE_ARG([--host=riscv])
 

pk/memset.c

@@ -1,58 +0,0 @@
-// See LICENSE for license details.
-
-#include <limits.h>
-#include <string.h>
-
-#if ULONG_MAX != 18446744073709551615UL && ULONG_MAX != 4294967295UL
-# error need sizeof(long) == 4 or sizeof(long) == 8
-#endif
-
-void* memset(void* m, int ch, size_t s)
-{
-  size_t i;
-  char* mem = (char*)m;
-  long* lmem;
-
-  if(s < sizeof(long))
-  {
-    for(i = 0; i < s; i++)
-      mem[i] = ch;
-    return m;
-  }
-
-  long l = ch & 0xFF;
-  l = l | (l << 8);
-  l = l | (l << 16);
-  #if ULONG_MAX == 18446744073709551615UL
-  l = l | (l << 32);
-  #endif
-
-  while((long)mem & (sizeof(long)-1))
-    *mem++ = ch, s--;
-  lmem = (long*)mem;
-
-  for(i = 0; i+7 < s/sizeof(long); i += 8)
-  {
-    lmem[i+0] = l;
-    lmem[i+1] = l;
-    lmem[i+2] = l;
-    lmem[i+3] = l;
-    lmem[i+4] = l;
-    lmem[i+5] = l;
-    lmem[i+6] = l;
-    lmem[i+7] = l;
-  }
-  lmem += i;
-  s -= i*sizeof(long);
-
-  for(i = 0; i < s/sizeof(long); i++)
-    lmem[i] = l;
-  lmem += i;
-  s -= i*sizeof(long);
-
-  mem = (char*)lmem;
-  for(i = 0; i < s; i++)
-    mem[i] = ch;
-
-  return m;
-}

pk/pk.mk.in

@@ -21,8 +21,6 @@ pk_c_srcs = \
 	frontend.c \
 	fp.c \
 	int.c \
-	memset.c \
-	strlen.c \
 	elf.c \
 
 pk_asm_srcs = \

pk/strlen.c

@@ -1,33 +0,0 @@
-// See LICENSE for license details.
-
-#include <string.h>
-#include <limits.h>
-
-#if ULONG_MAX != 18446744073709551615UL && ULONG_MAX != 4294967295UL
-# error need sizeof(long) == 4 or sizeof(long) == 8
-#endif
-
-// from http://www-graphics.stanford.edu/~seander/bithacks.html
-static inline long hasZeroByte(long l)
-{
-#if ULONG_MAX == 4294967295UL
-  return (l - 0x01010101UL) & ~l & 0x80808080UL;
-#else
-  return (l - 0x0101010101010101UL) & ~l & 0x8080808080808080UL;
-#endif
-}
-
-size_t strlen(const char* s)
-{
-  size_t i = 0;
-
-  // use optimized version if string starts on a long boundary
-  if(((long)s & (sizeof(long)-1)) == 0)
-    while(!hasZeroByte(*(long*)(s+i)))
-      i += sizeof(long);
-
-  while(s[i])
-    i++;
-
-  return i;
-}