[darcs-devel] [darcs #515] current stable doesn't build on Mac OS 10.4

[Tom Counsell]

The workaround that worked for me (also ghc 6.4, also OSX 10.4.2) was  
to do:

sudo gcc_select 3.3

to revert to the Panther gcc.

To undo this later, do sudo gcc_select 4.0

tom

On 12 Sep 2005, at 13:02, Guillaume wrote:

> Le 10 sept. 2005 à 16:08, Zooko a écrit :
>
> >  /usr/bin/ld: Undefined symbols:
> >  ___DISCARD__
> >  collect2: ld returned 1 exit status
> >  make: *** [stringify] Error 1
>
> This is a ghc bug. Where did you get yours?
>
> I just managed to compile a ghc 6.4 without this error. The problem  
> is that ghc uses this fake function in one of its Haskell to  
> assembly stages as a separator between assembly blocks to prevent  
> gcc from merging them together; then it suppresses the calls to  
> clean the code. But gcc 4.0 (the one delivered for Tiger) adds  
> references that ghc forgets to clean. Thus you end up with a code  
> not using the function, but still depending on its presence.
>
> What I did was compiling my ghc with an empty __DISCARD__ function  
> in libHSrts (just 'echo "void __DISCARD__() {}" > ghc/rts/ 
> discard.c ; make; sudo make install' in the ghc root directory); my  
> darcs finished compiling half an hour ago, and 'make check' gave no  
> error (apart from an failure on pull just because the test script  
> expects a "permission denied" and gets a "Permission denied" instead).
>
> What is curious is that your darcs' configure didn't complain on a  
> non-working ghc. Could it be that the "Hello world" test in  
> configure doesn't trigger the same ghc stages as in the real  
> compile stage?
>
> (I just realized I had sent this mail to bugs at darcs.net yesterday,  
> which isn't as well broadcast as darcs-devel)
>
> --
> Guillaume
>
> _______________________________________________
> darcs-devel mailing list
> darcs-devel at darcs.net
> http://www.abridgegame.org/cgi-bin/mailman/listinfo/darcs-devel
>