Hello George,
You're right that SDCC doesn't adjust the librarry
search path when --xstack is used. As a work-around you
can use --nostdlib to suppress the default path and add
-L/usr/local/share/sdcc/lib/huge-xstack-auto to point to
the proper library. There is no need to remove the huge-
stack-auto directory.
HTH,
Maarten
> Hello all,
>
> I decided to experiment with --model-huge --stack-auto --xstack so I built
> from sources on Linux (Ubuntu 10.04).
>
> Does sdcc ignore --xstack when auto-appending to the libdir? Looks like it
> searches into huge-stack-auto instead of huge-xstack-auto (same for large).
>
> I'm sending you details of how I built the compiler, what happened when I
> tried to build my project and the output of --print-search-dirs with various
> combinations of arguments. I'm also sending you info of what I did to fix
> this.
>
> Am I doing something really wrong here or is this a bug?
>
> Thanks ever so much for reading this, all. Any tips would be appreciated.
>
> Warm regards
> George
>
>
> sdcc -v
> SDCC : mcs51 2.9.7 #5844 (Jun 18 2010) (Linux)
>
> I configured with:
> ./configure --disable-gbz80-port --disable-z80-port --disable-ds390-port
> --disable-ds400-port
> --disable-pic-port --disable-pic16-port --disable-hc08-port
>
> Then I ran make
>
> Then I moved into device/lib, added huge and removed small and medium from
> incl.mk. Then:
> make model-mcs51-stack-auto
> make model-mcs51-xstack-auto
>
> After I installed, my library path had the following (among others):
> huge-stack-auto
> huge-xstack-auto
> large-stack-auto
> large-xstack-auto
>
> However, when I compiled my project with --model-huge --stack-auto --xstack
> , the linker started complaining about incorrect library build options (just
> a sample here, repeated many times):
> ?ASlink-Warning-Conflicting sdcc options:
> "-mmcs51 --model-huge --xstack" in module "contiki_sensinode_main" and
> "-mmcs51 --model-huge" in module "_gptrput".
>
> But I was certain I had built libraries correctly so I started looking into
> the default library search paths through --print-search-dirs:
>
> sdcc --model-huge --print-search-dirs
> ...
> libdir:
> /usr/local/bin/../share/sdcc/lib/huge
> /usr/local/share/sdcc/lib/huge
>
> sdcc --model-huge --stack-auto --print-search-dirs
> ...
> libdir:
> /usr/local/bin/../share/sdcc/lib/huge-stack-auto
> /usr/local/share/sdcc/lib/huge-stack-auto
>
> sdcc --model-huge --stack-auto --xstack --print-search-dirs
> ...
> libdir:
> /usr/local/bin/../share/sdcc/lib/huge-stack-auto
> /usr/local/share/sdcc/lib/huge-stack-auto
>
> So, it appears that the --xstack option is being ignored when auto-appending
> to the libdir? Should it not automatically look into <model>-xstack[-auto]
> instead? This appears to be the case with --model-large too.
>
> At the start I fixed this by deleting the huge-stack-auto libraries
> directory and specifying the correct one through -L. This doesn't really
> help though because we then can't turn --xstack off.
>
> Lastly, I looked at the sdcc sources, src/mcs51/main.c and did this at line
> 735 in revision 5844
>
> --- main.c 2010-06-18 18:23:43.000000000 +0100
> +++ main-xstack.c 2010-06-18 18:23:16.000000000 +0100
> @@ -733,8 +733,12 @@
> return "large";
>
> case MODEL_HUGE:
> - if (options.stackAuto)
> + if (options.stackAuto) {
> + if (options.useXstack) {
> + return "huge-xstack-auto";
> + }
> return "huge-stack-auto";
> + }
> else
> return "huge";
>
>
> This appears to have sorted it. lbdir is now reported correctly for
> model-huge --stack-auto both with as well as without --xstack.
> sdcc --model-huge --stack-auto --xstack --print-search-dirs
> ...
> libdir:
> /usr/local/bin/../share/sdcc/lib/huge-xstack-auto
> /usr/local/share/sdcc/lib/huge-xstack-auto
>
> ________________________________
> George Oikonomou
>
> Post-Doc Research Associate
> Computer Science,
> Loughborough University.
>
> Email: g.oikono...@lboro.ac.uk
> Web: http://www.spd.gr
> ________________________________
>
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