(taking this to the pd-dev list, and off the pd-lib-builder issue on github)

On 01/20/2018 09:55 PM, Lucas Cordiviola wrote:

@katjav: May be you know better whats happening.

The thing started while we where working on the Autotools branch https://github.com/pure-data/pure-data/pull/275

While testing that we also get a working 64bit Pd. On those tests @umlaeute suggested we try https://github.com/pure-data/pure-data/pull/7.

I never tried to build a w64 Pd without the` ./configure --with-wish=wish86.exe CPPFLAGS=-DPD_LONGINTTYPE=__int64`

It happens that if I build an external without `-DPD_LONGINTTYPE=__int64` Pd crashes when dsp is turned on (with the external under test)

Is still unknown what happens if w64 Pd is built without the CPPFLAG.

it's pretty well known what is happening when building Pd on 64bit windows without the CPPFLAG: Pd tries to cram a 64bit pointer into a 32bit integer, dropping 32 crucial bits, leaing to a segfault when trying to access the data at the given position.

gfmdsar IOhannes