Difficulties to compile Bochs plugins

[nicolas-cellier-aka-nice]

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 [email protected] 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

[eliotmiranda]

Hi Nicolas,

yes it would be good to update Bochs. I looked at it a few years ago and it was quite done work. So I’ve avoided it until now. Looking at what you’re going below it may still be possible to build it. The conf.COG scripts to run are those in build./bochs. So...

On macOS High Sierra: $ uname -a Darwin Aeolus.attlocal.net 17.7.0 Darwin Kernel Version 17.7.0: Sun Jun 2 20:31:42 PDT 2019; root:xnu-4570.71.46~1/RELEASE_X86_64 x86_64 $ cd build.macos64x64/bochsx64/ $ ./conf.COG checking build system type... i386-apple-darwin17.7.0 ... cp config.h bochsconfig.h and don't forget to run ./makeem $ ./makeem /Users/eliot/Cog/3dicc/opensmalltalk-vm/build.macos64x64/bochsx64/cpu g++ -c -I.. -I../../../processors/IA32/bochs/cpu/.. -I../instrument/stubs -I../../../processors/IA32/bochs/cpu/../instrument/stubs -g -pipe -O3 -fomit-frame-pointer -finline-functions -Dlongjmp=_longjmp -Dsetjmp=_setjmp -fpascal-strings -fno-common -Wno-four-char-constants -Wno-unknown-pragmas -Dmacintosh -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES -DCOG=1 ../../../processors/IA32/bochs/cpu/init.cc -o init.o ... ranlib libdisasm.a $ ls -l /.a -rw-rw-r-- 1 eliot staff 12222688 Sep 14 08:31 cpu/libcpu.a -rw-rw-r-- 1 eliot staff 707296 Sep 14 08:31 disasm/libdisasm.a -rw-rw-r-- 1 eliot staff 1788256 Sep 14 08:31 fpu/libfpu.a

On cygwin it does look like we have to update at least the configure scripts: $ cd build.win32x86/bochsx64/

eliot@terf /cygdrive/z/opensmalltalk-vm/build.win32x86/bochsx64 $ ./conf.COG checking build system type... ../../processors/IA32/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/ ftp://ftp.gnu.org/pub/gnu/config/*

If the version you run (../../processors/IA32/bochs/config.guess) is already up to date, please send the following data and any information you think might be pertinent to [email protected] 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 /bin/uname -X =

hostinfo = /bin/universe = /usr/bin/arch -k = /bin/arch = x86_64 /usr/bin/oslevel = /usr/convex/getsysinfo =

UNAME_MACHINE = x86_64 UNAME_RELEASE = 3.0.7(0.338/5/3) UNAME_SYSTEM = CYGWIN_NT-10.0 UNAME_VERSION = 2019-04-30 18:08 configure: error: cannot guess build type; you must specify one $

So we should

• add build directories in build.win64x64/{bochsx64,bochsx86,gdbarm32} & build.win32x86/gdbarm32
• update the configure scripts only in processors/IA32/bochs
• make sure the build procedure is documented

I only develop the VM on macOS so I've not noticed that the cygwin build no longer works. I apologize.

,,,^..^,,, (phone)

[nicolas-cellier-aka-nice]

Thanks for reminding the tips, it seems like I managed to break Xcode at that time... At least, I can compile on this mac OS configuration:

$ uname -a
Darwin MBP-de-Nicolas 18.7.0 Darwin Kernel Version 18.7.0: Thu Jan 23 06:52:12 PST 2020; root:xnu-4903.278.25~1/RELEASE_X86_64 x86_64
$ clang -v
Apple LLVM version 10.0.1 (clang-1001.0.46.4)
Target: x86_64-apple-darwin18.7.0
Thread model: posix