[m-rev.] diff: fix datestamp file bug for --target asm

[Fergus Henderson]

On 27-Jul-2001, Simon Taylor <stayl at cs.mu.OZ.AU> wrote:
> On 27-Jul-2001, Fergus Henderson <fjh at cs.mu.OZ.AU> wrote:
> > Estimated hours taken: 0.5
> > Branches: main
> > 
> > compiler/mercury_compile.m:
> > 	Fix a bug in stayl's recent change to add *_date files:
> > 	the option for PIC in the --target asm back-end is `--pic',
> > 	not `--pic-reg'.
> 
> Why do we need two different options for position independent code?

`--pic-reg' affects link compatibility, whereas `--pic' doesn't.
`--pic-reg' is needed when generating executables with `--shared',
whereas `--pic' isn't.

`--pic-reg' can be (and is) used in MCFLAGS/MGNUCFLAGS, whereas `--pic'
can't, because `--pic' changes the name of the generated file, rather
than just changing the generated code.

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "I have always known that the pursuit
The University of Melbourne         |  of excellence is a lethal habit"
WWW: <http://www.cs.mu.oz.au/~fjh>  |     -- the last words of T. S. Garp.
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