[Vm-dev] Minheadless trial

[Ben Coman]

wow time flies, its been 18 months since Ronie announced his
Minheadless VM branch...
[1] http://forum.world.st/Minheadless-VM-flavour-status-update-td4928091.html

I've been meaning this whole time to try it out.  Recently in my
meandering thoughts on FreeRTOS port, I guessed Minheadless might make
a good starting basis to experiment with.

So a quick test on Ubuntu16.04.3(Windows10-WSL)...

Long ago I'd already done...
   git clone git at github.com:OpenSmalltalk/opensmalltalk-vm.git
so I now did...
  cd opensmalltalk-vm
  git remote add ronie git at github.com:ronsaldo/opensmalltalk-vm.git
  git fetch ronie
  git checkout MinimalisticHeadless
  ./scripts/updateSCCSVersions
  cd build.minheadless.cmake/x64/pharo.stack.spur/
  ./mvm
  VM=`pwd`/release/dist/pharo
  ls $VM
==> confirmed it exists

  cd ~/pharo
  wget http://files.pharo.org/image/70/latest-minimal-64.zip
  unzip latest-minimal-64.zip
  sudo $VM Pharo7.0-metacello-64bit-65cff7b.image eval "19 + 23"
==> 42 yay


Particularly interesting from [1] is "using the same CMake scripts for
building on the three platforms: Windows, Linux and OS X."
So I thought I'd also give it a try under Windows10-VisualStudio2017.
I hardly used VS before, so I'll detail what I did as a reminder for
myself (and also in case someone might be able to help if I get
stuck).

Under a windows cmd.exe prompt (having installed git and cloned
opensmalltalk-vm a long time ago)
  cd opensmalltalk-vm
  git remote add ronie git at github.com:ronsaldo/opensmalltalk-vm.git
  git fetch ronie
  git checkout -b MinimalisticHeadless ronie/MinimalisticHeadless

I watched video [2] about CMake integration with Visual Studio 10.
and checked the VS workloads configuration specified [2 at 1:13]
using [3].

There is a CMakeLists.txt file in the git root folder, so..
started VS > File > Open > Folder...
C:\Repos\OpenSmalltalk\opensmalltalk-vm

The CMake command run ([2]@2:13) was...
  C:\...\cmake.exe  -G "Ninja"
     -DCMAKE_INSTALL_PREFIX:PATH="C:\Users\Ben\CMakeBuilds\...\x86-Debug"
     -DCMAKE_CXX_COMPILER="C:/.../MSVC/14.14.26428/bin/HostX86/x86/cl.exe"
     -DCMAKE_C_COMPILER="C:/.../MSVC/14.14.26428/bin/HostX86/x86/cl.exe"
     -DCMAKE_BUILD_TYPE="Debug"
     -DCMAKE_MAKE_PROGRAM="C:\...\CMAKE\Ninja\ninja.exe"
     "C:\Repos\OpenSmalltalk\opensmalltalk-vm"

I changed the cmake configuration [2 at 2:27] to "x64-Debug".
For debug target [2 at 3:00]  I chose "pharo.exe"

Hey, thats pretty cool [2 at 4:05] that switching between targets changes
the highlighting of #ifdef code.

I had a moment when I was missing the "Debug and Launch Settings" menu
item [2 at 4:40-4:55] and mentioned at [4], but maybe there was some
clash with previously experimenting with git cloning opensmalltalk-vm
from inside VS.
After closing VS and reopening my cmd.exe git'd opensmalltalk-vm it
showed up, but I didn't change any settings there.

Then (with x64-Debug & pharo.exe selected)
I went Cmake > Build All
==> 10 Errors, 9 Warnings, which I'll discuss in a followup post.

cheers -ben

[2] https://blogs.msdn.microsoft.com/vcblog/2016/10/05/cmake-support-in-visual-studio/
[3] https://docs.microsoft.com/en-us/visualstudio/install/modify-visual-studio
[4] https://blogs.msdn.microsoft.com/vcblog/2016/12/20/cmake-support-in-visual-studio-2017-whats-new-in-the-rc-update/
[5] https://developercommunity.visualstudio.com/content/problem/234808/cmake-debug-and-launch-settings-not-shown-while-bu.html