diff --git a/slof/Makefile.inc b/slof/Makefile.inc
index 8ad3337..d7a6b38 100644
--- a/slof/Makefile.inc
+++ b/slof/Makefile.inc
@@ -27,9 +27,7 @@ INCLBRDDIR ?= $(TOPBRDDIR)/include
 
 
 CPPFLAGS += -I. -I$(INCLCMNDIR) -I$(INCLBRDDIR) -I$(INCLCMNDIR)/$(CPUARCH)
-CFLAGS  = -DTARG=$(TARG) -static -Wall -W -std=gnu99 \
-	  -O2 -fomit-frame-pointer -msoft-float $(FLAG) $(CPUARCHDEF) \
-	  -fno-stack-protector -fno-strict-aliasing 
+CFLAGS  += -DTARG=$(TARG) -static -std=gnu99 $(FLAG) $(CPUARCHDEF)
 ASFLAGS = -Wa,-mpower4 -Wa,-mregnames $(FLAG) $(CPUARCHDEF)
 
 LDFLAGS += -static -nostdlib -Wl,-q,-n
diff --git a/slof/allocator.c b/slof/allocator.c
index 279b50b..e8f8858 100644
--- a/slof/allocator.c
+++ b/slof/allocator.c
@@ -17,6 +17,7 @@
 #include <stdlib.h>
 #include <stdbool.h>
 #include <helpers.h>
+#include <allocator.h>
 
 #undef DEBUG
 //#define DEBUG
@@ -45,17 +46,17 @@ struct bitmap {
 #define BM_WORD_MODULO(n)  (n % BM_WORD_BITS)
 #define BM_NUM_BITS(reqsize, bsize)     ((reqsize / bsize) + (reqsize % bsize? 1 : 0))
 
-void bm_clear_bit(unsigned long *bmw, int n)
+static void bm_clear_bit(unsigned long *bmw, int n)
 {
 	BM_WORD(bmw, n) &= ~BIT(BM_WORD_MODULO(n));
 }
 
-void bm_set_bit(unsigned long *bmw, int n)
+static void bm_set_bit(unsigned long *bmw, int n)
 {
 	BM_WORD(bmw, n) |= BIT(BM_WORD_MODULO(n));
 }
 
-bool bm_test_bit(unsigned long *bmw, int n)
+static bool bm_test_bit(unsigned long *bmw, int n)
 {
 #ifdef DEBUG
 	//printf("BMW %x, bitpos %d, value %d\n", &BM_WORD(bmw, n), n, !!(BM_WORD(bmw, n) & BIT(BM_WORD_MODULO(n))));
@@ -64,7 +65,7 @@ bool bm_test_bit(unsigned long *bmw, int n)
 }
 
 /* Improvement: can use FFS routines to get faster results */
-int bm_find_bits(struct bitmap *bm, unsigned int n_bits)
+static int bm_find_bits(struct bitmap *bm, unsigned int n_bits)
 {
 	unsigned int i, j, total_bits;
 	int found = -1;
diff --git a/slof/ppc64.c b/slof/ppc64.c
index 619d95e..4fc92b9 100644
--- a/slof/ppc64.c
+++ b/slof/ppc64.c
@@ -10,8 +10,11 @@
  *     IBM Corporation - initial implementation
  *****************************************************************************/
 
+#include <unistd.h>
 #include <cpu.h>
 
+void asm_cout(long Character,long UART,long NVRAM);
+
 /* the exception frame should be page aligned
  * the_exception_frame is used by the handler to store a copy of all
  * registers after an exception; this copy can then be used by paflof's
@@ -45,8 +48,7 @@ extern void io_putchar(unsigned char);
 extern unsigned long call_c(cell arg0, cell arg1, cell arg2, cell entry);
 
 
-long
-writeLogByte_wrapper(long x, long y)
+static long writeLogByte_wrapper(long x, long y)
 {
 	unsigned long result;
 
@@ -66,8 +68,7 @@ writeLogByte_wrapper(long x, long y)
  * @param count number of bytes to be written
  * @return      the number of bytes that have been written successfully
  */
-int
-write(int fd, const void *buf, int count)
+ssize_t write(int fd, const void *buf, size_t count)
 {
 	int i;
 	char *ptr = (char *)buf;
diff --git a/slof/ppc64.h b/slof/ppc64.h
index 59a1b90..e3a2cd2 100644
--- a/slof/ppc64.h
+++ b/slof/ppc64.h
@@ -34,7 +34,7 @@ extern cell the_mem[];   /* Space for the dictionary / the HERE pointer */
 extern cell *restrict dp;
 extern cell *restrict rp;
 
-void client_entry_point();
+void client_entry_point(void);
 
 extern unsigned long call_client(cell);
 extern long c_romfs_lookup(long, long, void *);