ARM has an option called -mwords-little-endian that provides big-endian
compatibility with pre-2.8 compilers. When I asked Richard about it,
he seemed to think it had outlived its usefulness, so this patch
deprecates it. We can then remove it once 4.7 is out.
Tested on arm-linux-gnueabi. OK to install? If so, I'll do a patch
for the web page as well.
Richard
Index: gcc/config/arm/arm.c
===================================================================
--- gcc/config/arm/arm.c 2011-06-29 09:33:37.000000000 +0100
+++ gcc/config/arm/arm.c 2011-06-29 12:20:35.000000000 +0100
@@ -1483,6 +1483,10 @@ arm_option_override (void)
if (TARGET_APCS_FLOAT)
warning (0, "passing floating point arguments in fp regs not yet
supported");
+ if (TARGET_LITTLE_WORDS)
+ warning (OPT_Wdeprecated, "%<mwords-little-endian%> is deprecated and "
+ "will be removed in a future release");
+
/* Initialize boolean versions of the flags, for use in the arm.md file. */
arm_arch3m = (insn_flags & FL_ARCH3M) != 0;
arm_arch4 = (insn_flags & FL_ARCH4) != 0;
Index: gcc/doc/invoke.texi
===================================================================
--- gcc/doc/invoke.texi 2011-06-22 16:45:29.000000000 +0100
+++ gcc/doc/invoke.texi 2011-06-29 12:17:40.000000000 +0100
@@ -10237,7 +10237,7 @@ Generate code for a little-endian word o
order. That is, a byte order of the form @samp{32107654}. Note: this
option should only be used if you require compatibility with code for
big-endian ARM processors generated by versions of the compiler prior to
-2.8.
+2.8. This option is now deprecated.
@item -mcpu=@var{name}
@opindex mcpu
