[Vm-dev] [OpenSmalltalk/opensmalltalk-vm] Difficulties to compile Bochs plugins (#427)

[Nicolas Cellier]

I want to simulate VM from a Spur64VMMaker.image
Unfortunately, it gets really difficult to compile Bochs plugins these days...

WINDOWS (cygwin64):

    $ cd processors/IA32/winbochs/
    $ source ./conf.COG

> checking build system type... ../bochs/config.guess: unable to guess system type
> 
> This script, last modified 2002-03-20, has failed to recognize
> the operating system you are using. It is advised that you
> download the most up to date version of the config scripts from
> 
>     ftp://ftp.gnu.org/pub/gnu/config/
> 
> If the version you run (../bochs/config.guess) is already up to date, please
> send the following data and any information you think might be
> pertinent to <config-patches at gnu.org> in order to provide the needed
> information to handle your system.
> 
> config.guess timestamp = 2002-03-20
> 
> uname -m = x86_64
> uname -r = 3.0.7(0.338/5/3)
> uname -s = CYGWIN_NT-10.0
> uname -v = 2019-04-30 18:08
> 
> /usr/bin/uname -p = unknown
> 

MAC (Darwin 17.7.0 Xcode 10.1):

    $ cd processors/IA32/macbochs
    $ ./conf.COG 

> checking build system type... i386-apple-darwin17.7.0
> checking host system type... i386-apple-darwin17.7.0
> checking target system type... i386-apple-darwin17.7.0
> checking if you are configuring for another platform... no
> checking for standard CFLAGS on this platform... -fpascal-strings -fno-common -Wno-four-char-constants -Wno-unknown-pragmas -Dmacintosh
> checking for gcc... gcc
> checking for C compiler default output file name... 
> configure: error: C compiler cannot create executables
> See `config.log' for more details.
> cp config.h bochsconfig.h
> cp: config.h: No such file or directory
> and don't forget to run ../bochs/makeem

LINUX (Ubuntu 18.04 thru WSL)

    $ cd processors/IA32/linuxbochs
    $ ./conf.COG

> checking build system type... x86_64-unknown-linux-gnu
> checking host system type... x86_64-unknown-linux-gnu
> checking target system type... x86_64-unknown-linux-gnu
> checking if you are configuring for another platform... no
> checking for standard CFLAGS on this platform...
> checking for gcc... gcc
> checking for C compiler default output file name... a.out
> checking whether the C compiler works... configure: error: cannot run C compiled programs.
> If you meant to cross compile, use `--host'.
> See `config.log' for more details.
> cp config.h bochsconfig.h
> cp: cannot stat 'config.h': No such file or directory
> and don't forget to run ../bochs/makeem

The problem is that the Bochs copy is super old. So we won't get support for compilation on uptodate machines...
We cannot upgrade easily, since there are COG specific changes requiring to be replayed...
`grep -r COG processors\IA32`.

I also have doubts about the `conf.COG` files:
is `--disable-x86-64` really what we want?
https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/e77147b63208fb40a9a1712a2d94d369886e91ab/processors/IA32/macbochs/conf.COG
https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/Cog/processors/IA32/macbochs/conf.COG



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