Re: Report: compil error on OSX for target=i386

[Yves Blusseau]

Le 1 sept. 09 à 13:46, Robert Millan a écrit :

On Mon, Aug 31, 2009 at 11:10:17PM +0200, Yves Blusseau wrote:

What about following compromise:
diff --git a/loader/i386/linux.c b/loader/i386/linux.c
index 4144384..1380eb8 100644
--- a/loader/i386/linux.c
+++ b/loader/i386/linux.c
@@ -543,7 +543,8 @@ grub_linux_boot (void)
 asm volatile ("lgdt %0" : : "m" (gdt_desc));

 /* Enter Linux.  */
-  asm volatile ("jmp *%2" : : "b" (0), "S" (real_mode_mem), "g"
(params->code32_start));
+  asm volatile ("xorl %%ebx, %%ebx\n"
+                     "jmp *%1" : : "S" (real_mode_mem), "g"
(params->code32_start));

#endif

Is this compromise acceptable?

Compil and work on OSX.

Is it ok to commit it ?

I think it's short-sighted, but it's their problem.


now, what's the next one?


dependency on GCC.

Apple is free to cripple the version of GCC they're shipping (we wanted them to have this freedom, even if they're unfriendly towards free software). However, on our side, I'm not satisfied at all with accomodating to arbitrary limitations like this one. This seems like a slippery slope. If we do it It's much easier to make official GCC a build requirement. People hacking on GRUB source, or distributors (e.g. Fink) should have no problem with a

So what you can do because currently we can't compil grub on OSX:


loader/i386/linux.c: In function ‘grub_linux_boot’:

loader/i386/linux.c:542: error: ‘asm’ operand has impossible constraints
loader/i386/linux.c:543: error: ‘asm’ operand has impossible constraints
loader/i386/linux.c:546: error: ‘asm’ operand has impossible constraints
make: *** [linux_mod-loader_i386_linux.o] Error 1


Regards,
Yves Blusseau

gcc-4.2 -Iloader/i386 -I./loader/i386 -I. -I./include -I./include - Wall -W -Wall -W -Wshadow -Wpointer-arith -Wmissing- prototypes -Wundef -Wstrict-prototypes -g -Os -falign- jumps=1 -falign-loops=1 -falign-functions=1 -DAPPLE_CC=1 -fnested- functions -m32 -fno-stack-protector -mno-stack-arg-probe -fno-builtin - mrtd -mregparm=3 -m32 -MD -c -o linux_mod-loader_i386_linux.o loader/ i386/linux.c loader/i386/linux.c:546: error: can't find a register in class ‘BREG’ while reloading ‘asm’

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