Hi all, I was hacking to get mingw32 builds of psyco to work and found a pretty weird thing: I used mingw32 (stable distro) to build the psyco extension on top of standard python2.6, built with Visual Studio, and got weird crashes. The reason is in objimpl.h: typedef union _gc_head { struct { union _gc_head *gc_next; union _gc_head *gc_prev; Py_ssize_t gc_refs; } gc; long double dummy; /* force worst-case alignment */ } PyGC_Head; Mingw32 behaves funny here. The size of long double is 12 ! 8-) I happened to use the _PyObject_GC_UNTRACK macro in psyco, instead of the function, and that caused the errors, because psython and the extension disagreed on the location of the gc pointers... Using PyObject_GC_Untrack instead fixed the problem, but there is a bad feeling left. Question: Is that considered a mingw bug? Should we change the above union to a safer construct? Or maybe I just missed something obvious and made a fool out of me? cheers - chris -- Christian Tismer :^) <mailto:tismer@stackless.com> tismerysoft GmbH : Have a break! Take a ride on Python's Johannes-Niemeyer-Weg 9A : *Starship* http://starship.python.net/ 14109 Berlin : PGP key -> http://wwwkeys.pgp.net/ work +49 30 802 86 56 mobile +49 173 24 18 776 fax +49 30 80 90 57 05 PGP 0x57F3BF04 9064 F4E1 D754 C2FF 1619 305B C09C 5A3B 57F3 BF04 whom do you want to sponsor today? http://www.stackless.com/