[Vm-dev] [HowTo] Compile CogVM for Windows 7 using MinGW/MSYS

Eliot Miranda eliot.miranda at gmail.com
Tue Sep 24 21:28:55 UTC 2013

Hi Tobias,

On Tue, Sep 24, 2013 at 2:13 PM, Tobias Pape <Das.Linux at gmx.de> wrote:

> Dear Eliot, all
> Am 24.09.2013 um 20:16 schrieb Eliot Miranda <eliot.miranda at gmail.com>:
> > Thanks Marcel!!  Can I fold this into my makefiles?
> Is gcc 3 really necessary for Cog?  “yes” clearly
> is a proper answer, but last year, as I had to fiddle
> with the Self VM and make it compile, even Old gcc4
> were a pain.

All I wanted to do was to thank Marcel for his advice on setting up a
functional build environment, and include whatever parts of that were
relevant.  I am actually trying to use gcc 4 for cygwin but this is on the
back burner because the win32api headers in latest cygwin releases were
damaged when last I tried to build (it appears someone has supplied the
64-bit version in the 32-bit context, grr...).  I tried to set up the
Makefile to select either gcc3 or gcc4 depending on cygwin version.  I was
doing this primarily to build a correct SqueakSSL plugin, which would not
build with the older win32 api in the older gcc3-based cygwin I've been
using since 2009.  Alas I failed to build using a more up-to-date cygwin.
 So you can imagine I was very pleased to see that Marcel had made progress.

So IMO, no gcc 3 should *not* be necessary to build Cog.  But a functional
build environment is needed, and right now I don't have a funcitonal
gcc4-based build environment :-(

Anyone who wants to try and fix this is very welcome.  I can supply them
with the Makefile that selects the appropriate gcc version.  So far I have
this in my not-yet-checked-in experimental Makefile:

# C compiler settings (gcc-3.4.4 cygwin 1.5.25(0.156/4/2) vs gcc-4.5.2
# determine cygwin version using uname -r
# determine "old" (eg 1.5.25(0.156/4/2)) or "new" cygwin (eg
ifeq ($(shell ls

ifdef NEWMGW

  Ian apparently has done some tweaks to the build system
> for the win32 branch[1]. It also uses MSYS and MinGW but
> probably more recent gcc'en (but I'm not sure)[2].
>   Just out of curiosity, have you sync'ed the cog-branch
> platform dir after the initial branching?

Not carefully.  I try to merge when I see relevant changes going into
trunk, but I've probably missed a few.

> Please do not regard me as a show stopper or „Spaßbremse“,
> but I figure, that the entry barrier to work with the
> Squeak VM or Cog is quite high, even if you don't want
> touch the interpreter/jit at all. We should make it
> more approachable.

+1000.  But I need help.  I don't have time to attend to this now :-(

>   I think Mariano did a good job for an introduction
> to building a Squeak/Cog VM[3], But his 2nd-level
> tool-chain (sources from gitorious+CMake via CMakeVMMaker)[4]
> seems vastly different from the current Makefile-based
> approach, but apparently, the CMake toolchain can make use
> of more recent compilers.
> Where are we headed?

Onwards and upwards ;-)  Personally I hate both autoconf and CMake, but
better the devil you know, and have hence stuck with autoconf on unix.  On
Mac & cygwin I use ungenerated makefiles.  I'm open to change but I don't
want to do the work.  If someone can help produce functional build
environments I'll gladly try them out and fold them back in if they work.
 But they must work for the Squeak VM, the Squeak MT VM and the Newspeak
VM.  That's what I build across three platforms right now and I don't want
to waste the cycles trying to get new stuff to work with no guarantee of
success...  Call me a cynic ;-)

> Best
>         -Tobias
> [1] http://squeakvm.org/cgi-bin/viewvc.cgi/squeak/trunk/platforms/win32/
> [2]
> http://squeakvm.org/cgi-bin/viewvc.cgi/squeak/trunk/platforms/win32/HowToBuild.txt?revision=2612&view=markup
> [3]
> https://marianopeck.wordpress.com/2011/04/10/building-the-vm-from-scratch-using-git-and-cmakevmmaker/
> [4] I would call the MSYS+MinGW tool-chain 1st level in this case

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