[PATCH] Build for ARMv4 archicture

[Ray I-Jui Sung(宋宜叡)]

Hi,
 
When building newlib using GCC with -mcpu=strongarm1110 (i.e. ARMv4 ISA), assembler complains about a BX instruction which is not available in that  ISA:

../../../../../combined/libgloss/arm/linux-syscalls0.S: Assembler messages:
../../../../../combined/libgloss/arm/linux-syscalls0.S:206: Error: selected processor does not support `bx r3'
make[5]: *** [linux-syscalls0.o] Error 1

Below is a patch for this. It looks like that the GNU as magically assembles Thumb mnemonics other than "BX" into equvalent ARM code.


2006-09-29  I-Jui Sung  <ijsung@faraday-tech.com>

	* arm/linux-syscalls0.S: Use BX only when __thumb__ defined.

Index: libgloss/arm/linux-syscalls0.S
===================================================================
--- src/libgloss/arm/linux-syscalls0.S	2006-07-05 07:58:02.000000000 +0800
+++ src.new/libgloss/arm/linux-syscalls0.S	2006-09-26 17:52:03.000000000 +0800
@@ -203,7 +203,11 @@
 	bl _socketcall
 	pop { r3 }
 	add sp, #16
+#if __thumb__
 	bx r3
+#else
+	mov pc, r3
+#endif
 	SIZE(_socketcall_tail)
 
 #define SOCKETCALL2(name, NAME) SOCKETCALL(name, NAME)

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