[mercury-users] linking

[Ralph Becket]

When in doubt, do an mmake clean before recompiling.  In my experience,
linking problems usually (90%) turn up when you've changed the compilation
grade, but forget to issue an mmake clean afterwards.  I think the latest
rotd gives you a nicer error message to this effect.

Ralph

> I am getting the following error when attempting to compile 
> either with
> GRADEFLAGS = --debug, or with C2INITFLAGS and MLFLAGS set to 
> --trace and
> MCFLAGS-<module> set to --trace deep
> 
> Undefined                       first referenced
>  symbol                             in file
> mercury__f_matrix__init             Mercury/os/partb_init.o
> ld: fatal: Symbol referencing errors. No output written to partb
> collect2: ld returned 1 exit status
> gmake: *** [partb] Error 1
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