[newlib-cygwin] Make more macro checks ARMv8-M baseline proof.

[newlib-cygwin] Make more macro checks ARMv8-M baseline proof.

[Christophe Lyon]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=630808d2a2865634df3f54cec403a058511596e7

commit 630808d2a2865634df3f54cec403a058511596e7
Author: Christophe Lyon <christophe.lyon@linaro.org>
Date:   Mon Apr 1 17:30:53 2019 +0000

    Make more macro checks ARMv8-M baseline proof.
    
    Commit 69f4c4029183fb26d2fcae00790881620c1978a3 improved most
    macro checks to be ARMv8-M baseline proof, but missed a few
    occurrences which otherwise fail to build when using a CPU setting
    such as cortex-m0 or cortex-m23. This patch brings the same
    changes as the ones that were committed to libgloss at that time.
    
    	newlib:
    	* libc/sys/arm/crt0.S: Use THUMB1_ONLY rather than
    	__ARM_ARCH_6M__.

Diff:
---
 newlib/libc/sys/arm/crt0.S | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/newlib/libc/sys/arm/crt0.S b/newlib/libc/sys/arm/crt0.S
index 64d4259..8c9f7be 100644
--- a/newlib/libc/sys/arm/crt0.S
+++ b/newlib/libc/sys/arm/crt0.S
@@ -85,7 +85,7 @@
 
 	/*  Stack limit is at end of data.  */
 	/*  Allow slop for stack overflow handling and small frames.  */
-#ifdef __ARM_ARCH_6M__
+#ifdef THUMB1_ONLY
 	ldr	r0, .LC2
 	adds	r0, #128
 	adds	r0, #128
@@ -137,7 +137,7 @@
 	beq	.LC27
 
 	/*  Allow slop for stack overflow handling and small frames.  */
-#ifdef __ARM_ARCH_6M__
+#ifdef THUMB1_ONLY
 	adds	r2, #128
 	adds	r2, #128
 	mov	sl, r2
@@ -164,7 +164,7 @@
 #ifdef __thumb2__
 	it	eq
 #endif	
-#ifdef __ARM_ARCH_6M__
+#ifdef THUMB1_ONLY
 	bne	.LC28
 	ldr	r3, .LC0
 .LC28:
@@ -219,7 +219,7 @@
 	   this default 64k is enough for the program being executed.
 	   However, it ensures that this simple crt0 world will not
 	   immediately cause an overflow event:  */
-#ifdef __ARM_ARCH_6M__
+#ifdef THUMB1_ONLY
 	movs	r2, #64
 	lsls	r2, r2, #10
 	subs	r2, r3, r2