dollars-in-identifiers on ARM, was: Creating and using GCJ ARM cross compiler

[Andrew Haley]

Matthijs van de Water wrote:
> On Fri, Apr 18, 2008 at 7:17 PM, Andrew Haley <aph@redhat.com> wrote:
>>> error: stray '$' in program
>>  > [error repeated a lot of times]
>>  >
>>  > If I add "-fdollars-in-identifiers" to my compile statement, it
>>  > completes without error, but I would expect this not to be necessary.
>>
>>  Well, it is.  For some reason I could never understand, it's needed on arm.
>>  I added -fdollars-in-identifiers in several places in the libgcj build.
> The reason for this is probably that gcc/config/arm/aout.h has:
> 
> /* Arm Assembler barfs on dollars.  */
> #define DOLLARS_IN_IDENTIFIERS 0

No, that's not the reason, it's just the implementation.

> See also http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24111 which if I
> read it correctly says that what is done with GCJ on ARM violates EABI
> rules...

Indeed, yes:

"4.4.4 Symbol names

"All symbol names containing a dollar character (‘$’) are reserved to the ARM EABI."

http://refspecs.freestandards.org/elf/ARMELF.pdf

> Is this something that can/should be fixed?

No.  This bug is closed, RESOLVED INVALID.  I don't think it should
be fixed.  The only reasonable way to fix it IMO is to change the 
ARM ELF spec, and that's not at all likely.

Andrew.