[Octave-bug-tracker] [bug #44998] [MXE] On Windows side, 64-bit OF modules can be miscompiled

[Philip Nienhuis]

Follow-up Comment #40, bug #44998 (project octave):

As to bug #45039, AFAIU that refers to the host's build chain (Linux gcc) that
is used to build the cross-compiler. On my Linux system (Mageia-4) that build
goes straight trough, so maybe there is an incompatibility problem on the
Ubuntu side (note: I don't say "bug").

Back to topic:
I do not fully trust the gcc compiler(s - both cross and cross-built native).
I've put cout statements after almost every statement in csv2cell.cc, all
variable values thus echoed to the screen look valid, and the next statement
(completely valid c++ syntax) crashes the application. The fact that the same
code works well with another compiler version gives a very itchy feeling.

A while ago I tried to look back in Octave's own log to see when the change
happened that provoked these crashes. It must have happened somewhere before
the time that gui-release and default were merged; a few weeks before that
moment these problems didn't occur. OK, gui-release (3.9.0+) was required to
build some OF packages but they did run fine in default (the then 4.1.0+) in
my dual-version MXE builds (patch #8469). IOW, somewhere earlier in the (then)
4.1.0+ branch something happened that hampered building OF packages.

Maybe it is time to re-attempt a native build on MinGW (using e.g., 4.9.2) to
check if the cross-compiler is reliable.


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