newlib-lto.patch

--- newlib-1.20.0/newlib/libc/machine/arm/arm_asm.h	2011-10-18 13:35:17.000000000 +0200
+++ newlib-1.20.0/newlib/libc/machine/arm/arm_asm.h	2012-06-19 14:07:37.000000000 +0200
@@ -63,6 +63,7 @@
 
 /* Now some macros for common instruction sequences.  */
 #ifdef __ASSEMBLER__
+
 .macro  RETURN     cond=
 #if defined (_ISA_ARM_4T) || defined (_ISA_THUMB_1)
 	bx\cond	lr
@@ -78,20 +79,29 @@
 .endm
 
 #else
-asm(".macro  RETURN	cond=\n\t"
+
+// Guards for LTO
+asm(".ifndef _ARM_ASM_C_MACRO_GUARD_RETURN\n\t"
+    ".set _ARM_ASM_C_MACRO_GUARD_RETURN,1\n\t"
+    ".macro  RETURN	cond=\n\t"
 #if defined (_ISA_ARM_4T) || defined (_ISA_THUMB_1)
     "bx\\cond	lr\n\t"
 #else
     "mov\\cond	pc, lr\n\t"
 #endif
-    ".endm"
+    ".endm\n\t"
+    ".endif"
     );
 
-asm(".macro optpld	base, offset=#0\n\t"
+// Guards for LTO
+asm(".ifndef _ARM_ASM_C_MACRO_GUARD_OPTPLD\n\t"
+    ".set _ARM_ASM_C_MACRO_GUARD_OPTPLD,1\n\t"
+    ".macro optpld	base, offset=#0\n\t"
 #if defined (_ISA_ARM_7)
     "pld	[\\base, \\offset]\n\t"
 #endif
-    ".endm"
+    ".endm\n\t"
+    ".endif"
     );
 #endif