Don't depend on BSD naming

libc/string/arm/_memcpy.S

@@ -184,7 +184,7 @@ _memcpy:
 	stmdb	sp!, {r4, r5}
 
 .Lmemcpy_fsrcul1loop16:
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 	mov	r3, lr, lsl #8
 	ldmia	r1!, {r4, r5, r12, lr}
 	orr	r3, r3, r4, lsr #24
@@ -213,7 +213,7 @@ _memcpy:
 	blt	.Lmemcpy_fsrcul1l4
 
 .Lmemcpy_fsrcul1loop4:
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 	mov	r12, lr, lsl #8
 	ldr	lr, [r1], #4
 	orr	r12, r12, lr, lsr #24
@@ -237,7 +237,7 @@ _memcpy:
 	stmdb	sp!, {r4, r5}
 
 .Lmemcpy_fsrcul2loop16:
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 	mov	r3, lr, lsl #16
 	ldmia	r1!, {r4, r5, r12, lr}
 	orr	r3, r3, r4, lsr #16
@@ -266,7 +266,7 @@ _memcpy:
 	blt	.Lmemcpy_fsrcul2l4
 
 .Lmemcpy_fsrcul2loop4:
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 	mov	r12, lr, lsl #16
 	ldr	lr, [r1], #4
 	orr	r12, r12, lr, lsr #16
@@ -290,7 +290,7 @@ _memcpy:
 	stmdb	sp!, {r4, r5}
 
 .Lmemcpy_fsrcul3loop16:
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 	mov	r3, lr, lsl #24
 	ldmia	r1!, {r4, r5, r12, lr}
 	orr	r3, r3, r4, lsr #8
@@ -319,7 +319,7 @@ _memcpy:
 	blt	.Lmemcpy_fsrcul3l4
 
 .Lmemcpy_fsrcul3loop4:
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 	mov	r12, lr, lsl #24
 	ldr	lr, [r1], #4
 	orr	r12, r12, lr, lsr #8
@@ -430,7 +430,7 @@ _memcpy:
 	stmdb	sp!, {r4, r5, lr}
 
 .Lmemcpy_bsrcul3loop16:
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 	mov	lr, r3, lsr #8
 	ldmdb	r1!, {r3-r5, r12}
 	orr	lr, lr, r12, lsl #24
@@ -459,7 +459,7 @@ _memcpy:
 	blt	.Lmemcpy_bsrcul3l4
 
 .Lmemcpy_bsrcul3loop4:
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 	mov	r12, r3, lsr #8
 	ldr	r3, [r1, #-4]!
 	orr	r12, r12, r3, lsl #24
@@ -483,7 +483,7 @@ _memcpy:
 	stmdb	sp!, {r4, r5, lr}
 
 .Lmemcpy_bsrcul2loop16:
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 	mov	lr, r3, lsr #16
 	ldmdb	r1!, {r3-r5, r12}
 	orr	lr, lr, r12, lsl #16
@@ -512,7 +512,7 @@ _memcpy:
 	blt	.Lmemcpy_bsrcul2l4
 
 .Lmemcpy_bsrcul2loop4:
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 	mov	r12, r3, lsr #16
 	ldr	r3, [r1, #-4]!
 	orr	r12, r12, r3, lsl #16
@@ -536,7 +536,7 @@ _memcpy:
 	stmdb	sp!, {r4, r5, lr}
 
 .Lmemcpy_bsrcul1loop32:
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 	mov	lr, r3, lsr #24
 	ldmdb	r1!, {r3-r5, r12}
 	orr	lr, lr, r12, lsl #8
@@ -565,7 +565,7 @@ _memcpy:
 	blt	.Lmemcpy_bsrcul1l4
 
 .Lmemcpy_bsrcul1loop4:
-#if BYTE_ORDER == BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
 	mov	r12, r3, lsr #24
 	ldr	r3, [r1, #-4]!
 	orr	r12, r12, r3, lsl #8