This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: i386-rtems(i386-coff) failure in egcs-19980628
> version: egcs-19980628
> host: RedHat Linux 5.0 (i686-pc-linux-gnu)
> target: i386-rtems (based on i386-coff)
> (NOTE: i386-rtemself has built successfully)
Ha! It's not that I enjoy seeing you specifically suffer, Joel. It's
just that I welcome somebody else into x86 assembler "what do you mean
everything isn't linux?" hell. :-)
It took me a couple of builds to duplicate this and I think I've spotted
the offending code. However, I have little idea what the _best_
solution to this is.
> The failure occured while compiling __floatdidf from libgcc2.c. The
[ munch ]
> _floatdidf
> /tmp/ccekaQTS: Assembler messages:
> /tmp/ccekaQTS:112: Error: Alignment not a power of 2
I was able to duplicate this only with the GNU assembler, but I see
it fail on OSR5, too. i386-coff suffers from the same failure and
has slightly fewer config files in the way. Fortunately, OSR5 is
immune from this, but I couldn't at all point to sco5.h as a model for
anything.
For i386-coff, ultimately i386/gas.h gets included. This combination of
targets won't define ASM_OUTPUT_ALIGN, so we get the default one - the
one that says the argument to .align is the power of 2 we should pad to,
not the number of bytes that we should pad to.
This patch is absolutely wrong and should not be committed. It will,
I believe, get you going again, Joel.
If you'd like to fix only (and specifically) the rtems target, you might
think about cabbaging the definition and comments for ASM_OUTPUT_ALIGN
and stuffing them into i386-rtems.h. I think that'll get you going.
The comment about recent GAS versions sounds like somehing you should
note.
This is too sticky for me. I don't know the preferred way to make
a common file like gas.h know which of the conventions are used. I
suppose it could be autoconfiscated...
Index: gas.h
===================================================================
RCS file: /egcs/carton/cvsfiles/egcs/gcc/config/i386/gas.h,v
retrieving revision 1.3
diff -u -p -r1.3 gas.h
--- gas.h 1998/05/21 19:12:18 1.3
+++ gas.h 1998/07/07 04:38:49
@@ -80,7 +80,7 @@ Boston, MA 02111-1307, USA. */
doubt or guess work, and since this file is used for both a.out and other
file formats, we use one of them. */
-#if 0 /* ??? However, not every port uses binutils 2.6 yet. */
+#if 1 /* ??? However, not every port uses binutils 2.6 yet. */
#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))