stage1: un-generalize PPC specific options

src/string.c

@@ -44,7 +44,7 @@ size_t strlen(const char *s); /* forward declaration */
 
 /* allow using built-in libc if WOLFBOOT_USE_STDLIBC is defined */
 #ifndef WOLFBOOT_USE_STDLIBC
-#if !defined(BUILD_LOADER_STAGE1) || \
+#if !(defined(BUILD_LOADER_STAGE1) && defined(ARCH_PPC)) || \
     (defined(PRINTF_ENABLED) && defined(DEBUG_UART))
 
 int islower(int c)
@@ -228,7 +228,7 @@ int memcmp(const void *_s1, const void *_s2, size_t n)
 #endif /* !BUILD_LOADER_STAGE1 || (PRINTF_ENABLED && DEBUG_UART) */
 
 #if !defined(__CCRX__) /* Renesas CCRX */
-#if !defined(BUILD_LOADER_STAGE1) || defined(DEBUG_UART)
+#if !(defined(BUILD_LOADER_STAGE1) && defined(ARCH_PPC)) || defined(DEBUG_UART)
 size_t strlen(const char *s)
 {
     size_t i = 0;

stage1/Makefile

@@ -21,14 +21,15 @@ V?=0
 DEBUG?=0
 DEBUG_UART?=0
 
+ifeq ($(ARCH),PPC)
 OBJS:= \
 	./hal/$(TARGET).o \
 	./src/string.o \
 	loader_stage1.o
+endif
 
 WOLFCRYPT_OBJS:=
 PUBLIC_KEY_OBJS:=
-
 # Forcefully disable TPM support in first stage loader
 WOLFTPM=0
 ELF=0
@@ -72,10 +73,11 @@ CFLAGS+=\
 	-DWOLFBOOT_STAGE1_BASE_ADDR=$(WOLFBOOT_STAGE1_BASE_ADDR)
 
 # For printf support (disable NO_PRINTF_UART) and increase WOLFBOOT_STAGE1_SIZE
-CFLAGS+=-DNO_PRINTF_UART
-
-# Use PIC (Position Independent Code) for first stage loader
-CFLAGS+=-fPIC
+ifeq ($(ARCH),PPC)
+  CFLAGS+=-DNO_PRINTF_UART
+  # Use PIC (Position Independent Code) for first stage loader
+  CFLAGS+=-fPIC
+endif
 
 
 BUILD_DIR=.