I couldn't resist to give it another try.  After solving the _environ 
symbol (see attached patch) I got a bunch of other undefined symbols. 
Maybe it helps a bit.

Note:
I'd have like to make a configure check for crt-externs.h, but since the 
requirements to use the autotools are higher than OSX 10.4 by default 
has, I decided to make it a __APPLE__ conditional.


Lina Pezzella wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> On Oct 26, 2005, at 2:59 PM, Grobian wrote:
> 
>> Maybe I get a moment of brilliance and can fix it before the weekend, 
>> but I think not.
> 
> If you have better things to take care of, don't worry about it. I've 
> dealt with the graphviz package before so I am fairly sure I can take 
> care of it this weekend. The only downside is that I have a very large 
> exam tomorrow and an interview on Friday, so it will need to wait until 
> Saturday or Sunday. But it's been waiting a while anyways, so I don't 
> suppose this is an issue.
> 
> - --Lina Pezzella
> Gentoo Developer
> 
> 
>>
>> Lina Pezzella wrote:
>>
>>> -----BEGIN PGP SIGNED MESSAGE-----
>>> Hash: SHA1
>>> On Oct 26, 2005, at 12:28 PM, Grobian wrote:
>>>
>>>> there is a bug on it and I have been working on it today.
>>>>
>>>> I already marked the deep dependencies of libsvg-cairo and cairo 
>>>> itself in portage.
>>>>
>>>> Cairo and libsvg-cairo compiled fine for me.
>>>>
>>>> 2.4 is not enough, it is vulnerable, so it should *not* be keyworded 
>>>> at all.  See the security bug on it.
>>>>
>>> Okie doke. Must've missed that e-mail. Thanks.
>>>
>>>> I have problems with graphviz 2.6, it fails during the linking part 
>>>> on a undefined symbol:
>>>>
>>>> <much bla bla>
>>>> libs/libexpr.lax/libvmalloc.a/vmtrace.o 
>>>> .libs/libexpr.lax/libvmalloc.a/vmwalk.o   -L/var/tmp/graphviz/lib 
>>>> ../../lib/cdt/.libs/libcdt.dylib -lc  -install_name 
>>>> /var/tmp/graphviz/lib/graphviz/libexpr.1.dylib 
>>>> -Wl,-compatibility_version -Wl,2 -Wl,-current_version -Wl,2.0
>>>> ld: warning -L: directory name (/var/tmp/graphviz/lib) does not exist
>>>> ld: Undefined symbols:
>>>> _environ
>>>> /usr/bin/libtool: internal link edit command failed
>>>> make[3]: *** [libexpr.la] Error 1
>>>> make[2]: *** [all-recursive] Error 1
>>>> make[1]: *** [all-recursive] Error 1
>>>> make: *** [all] Error 2
>>>>
>>> Yeah, I know. I will hopefully get to this this weekend. The only 
>>> reason I was interested in 2.4 was that it compiles out of the box.
>>> - --Lina Pezzella
>>> Gentoo Developer
>>> -----BEGIN PGP SIGNATURE-----
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>>> XZGO2hEYMu2GeugCUIQ918Q=
>>> =PBxQ
>>> -----END PGP SIGNATURE-----
>>> --gentoo-osx@g.o mailing list
>>>
>>
>> --Fabian Groffen
>> Gentoo for Mac OS X Project -- Interim Lead
>> --gentoo-osx@g.o mailing list
>>
>>
> 
> 
> 
> -----BEGIN PGP SIGNATURE-----
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> 8UZHXbAlWPvMYc7IDOTS5nw=
> =Cu36
> -----END PGP SIGNATURE-----
> --gentoo-osx@g.o mailing list
> 

-- 
Fabian Groffen
Gentoo for Mac OS X Project -- Interim Lead

diff -Naur graphviz-2.6-orig/lib/ast/pathpath.c graphviz-2.6/lib/ast/pathpath.c
--- graphviz-2.6-orig/lib/ast/pathpath.c	2005-10-30 15:15:30.000000000 +0100
+++ graphviz-2.6/lib/ast/pathpath.c	2005-10-30 15:16:20.000000000 +0100
@@ -33,7 +33,12 @@
 #include <unistd.h>
 
 /* #include <option.h> */
+#ifdef __APPLE__
+#include <crt_externs.h>
+#define environ (*_NSGetEnviron())
+#else
 extern char **environ;
+#endif
 char **opt_info_argv;
 
 char *pathpath(register char *path, const char *p, const char *a, int mode)