[Stackless] Compiling Stackless on Mac OS X

[Jeff Senn]

Yes Richard's suggestion should work.  There is one other small change that I
have in my version (on OS-X that works wonderfully every day!) which gets rid
of the warning:

Index: Stackless/platf/switch_ppc_macosx.h
===================================================================
--- Stackless/platf/switch_ppc_macosx.h (revision 47239)
+++ Stackless/platf/switch_ppc_macosx.h (working copy)
@@ -32,15 +32,22 @@

  #define STACK_MAGIC 3

+#if 0
  #define REGS_TO_SAVE "r13", "r14", "r15", "r16", "r17", "r18", "r19", "r20", \
         "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29", "r31", \
         "cr2", "cr3", "cr4"
+#else
+#define REGS_TO_SAVE "r13", "r14", "r15", "r16", "r17", "r18", "r19", "r20", \
+       "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29",       \
+       "cr2", "cr3", "cr4"
+#endif

  static int
  slp_switch(void)
  {
         static int x = 0;
-       register int *stackref, stsizediff;
+       register intptr_t *stackref;
+       register int stsizediff;
         __asm__ volatile (
             "; asm block 1\n"
             : /* no outputs */


Richard Tew wrote:
> On 7/4/06, Max Noel <maxfnoel at gmail.com> wrote:
>> ./Stackless/platf/switch_ppc_macosx.h: In function 'slp_transfer':
>> ./Stackless/platf/switch_ppc_macosx.h:44: error: PIC register 'r31'
>> clobbered in 'asm'
>> make: *** [Stackless/core/slp_transfer.o] Error 1
>>
>> My box is a dual G5 Power Mac running OS X 10.4.7, and I'm compiling
>> with the Apple-supplied GCC 4.0.1. "Regular" CPython 2.4.3 compiles
>> and works fine.
>>
>> Has anyone had any success in compiling/running Stackless on OS X? If
>> so, what did I do wrong? If not, how can I help in getting it to work?
> 
> You did nothing wrong that I am aware of.  I do not use Mac OS, but here is
> what I would try to start off with.
> 
> In the file switch_ppc_macosx.h, change the following define:
> 
> #define REGS_TO_SAVE "r13", "r14", "r15", "r16", "r17", "r18", "r19", "r20", \
>        "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29", "r31", \
>        "cr2", "cr3", "cr4"
> 
> To:
> 
> #define REGS_TO_SAVE "r13", "r14", "r15", "r16", "r17", "r18", "r19", "r20", \
>        "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29",  \
>        "cr2", "cr3", "cr4"
> 
> That is, just remove the "r31" entry.  Then try again and let me know what
> happens :)
> 
> Richard.
> 
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