[q-lang-users] malloc problems on mac os x

[Tim H. <q...@st...>]

Hi,

I'm having problems building Q on macos x (Panther, uptodate). My first
build runs 95% the way through, and then complains of a malloc double-free.
A subsequent `make' in the same directory immediately afterwards runs to
completion. However, the resultant binary also displays the malloc errors
when you quit the interpreter or when a script finishes.

Typically it looks like:

 | dlcompat: pthread_setspecific failed
 | *** malloc[23438]: Deallocation of a pointer not malloced: 0x501d90; This
 | could be a double free(), or free() called with the middle of an allocated
 | block; Try setting environment variable MallocHelp to see tools to help
 | debug
 | *** malloc[23438]: error for object 0x501ec0: Double free
 | make[2]: *** [qcwrap.c] Error 1
 | make[1]: *** [all-recursive] Error 1
 | make: *** [all] Error 2

This only appears on my mac box, not any linux machine I've used. I've
played around with a few things - setting the above environment variables
wasn't any use, gdb didn't get me anywhere, playing with various
--disable-pthread options didn't help, neither did switching the underlying
version of libtool (a perennial problem in building things on mac - still
no joy). 

Any blinding flashes of insight would be appreciated. I'm off to *try*
building a debug Q interpreter and maybe trying valgrind or something ...
:/

I'm attaching the full build log here as well. 

~Tim
-- 
<http://spodzone.org.uk/>