Editing Free Compiler Setup Under Linux

This article explains how to setup a free compiler, MS VC++, under Linux through Wine, under assumption, that Orbiter itself can be [http://www.orbiterwiki.org/wiki/Running_Orbiter_under_Wine ran under Linux through Wine] for testing your modules. Latest possible setup that is capable of doing it is [http://www.winehq.org Wine 1.6.2] and [http://orbit.medphys.ucl.ac.uk/download.html Orbiter 2016], using the built-in DX7 graphical client and [http://orbiter-forum.com/showthread.php?t=18431 DX9 client]. The steps presented here have been tested on Debian-stable ("jessie"). 
The concept is based on downloading and running MS VC++ executables, wrapped by [http://www.winehq.org Wine], and fed back to a native multiplatform IDE - [http://www.codeblocks.org/ Code::Blocks]. Thanks to [https://wiki.winehq.org/Winetricks winetricks], it's of course easy to download the VC++ executables, along with its IDE, and run the whole VC's IDE through Wine, but such a setup is unstable. 

== Preparing Code::Blocks ==
=== Downloading build software and Code::Blocks ===
First, checkout and try to build C::B from source, to see if it the build succeeds. Alternatively, while the IDE builds, you may start hacking the source already.
<pre>
# Build reqirements
sudo aptitude install subversion wine winetricks build-essential \
libtool automake libhunspell-dev libgamin-dev libwxgtk3.0-dev

# Codeblocks
mkdir -p ~/devel/codeblocks
mkdir -p ~/devel/bin
cd ~/devel/codeblocks
# Checking out version 16.01 which is the latest stable version.
svn checkout svn://svn.code.sf.net/p/codeblocks/code/tags/16.01
</pre>

=== Hacking Code::Blocks ===
The CB needs to be a bit hacked, to enable MS VC++ under Linux, which normally isn't possible. The hacking is kept to a minimum and additionally allows to use the same CB project file to compile code under Windows, using the same build targets. 
Save the following patch:
<pre>
--- compilergcc.cpp	2016-04-11 18:16:50.181091749 +0200
+++ compilergcc-new.cpp	2016-04-11 18:17:22.013365534 +0200
@@ -869,6 +869,12 @@
         CompilerFactory::RegisterCompiler(new CompilerIAR(wxT("8051")));
         CompilerFactory::RegisterCompiler(new CompilerIAR(wxT("ARM")));
     }
+    else
+    {
+    	//CompilerFactory::RegisterCompiler(new CompilerMSVC);
+        CompilerFactory::RegisterCompiler(new CompilerMSVC8);
+        //CompilerFactory::RegisterCompiler(new CompilerMSVC10);
+    }
     CompilerFactory::RegisterCompiler(new CompilerICC);
     CompilerFactory::RegisterCompiler(new CompilerGDC);
     CompilerFactory::RegisterCompiler(new CompilerGNUFortran);
</pre>
Under the following full path:
<pre>
~/devel/codeblocks/16.01/src/plugins/compilergcc/compilergcc-new.cpp
</pre>
And perform the actual patching:
<pre>
cd ~/devel/codeblocks/16.01/src/plugins/compilergcc/
patch < compilergcc-new.cpp
</pre>

=== Compiling Code::Blocks ===
<pre>
cd ~/devel/codeblocks/16.01
./bootstrap
# New compilers need the permissive flag
./configure --with-contrib-plugins=all --prefix=/usr CXXFLAGS=-fpermissive
make -j2
sudo make install
</pre>

== Preparing MS VC2005 Express and Platform SDK ==
Execute the following script and take note of the comments at winetricks installation:
<pre>
#!/bin/bash

prefixName=vc2005express
prefixDir=$HOME/.local/share/wineprefixes
prefix=$prefixDir/$prefixName

export WINEPREFIX=$prefix
export WINEARCH=win32

winetricks vc2005express 	# Deselect every component at installation
winetricks psdk2003 		# Choose typical installation

# Link the installed VC and SDK
cd $prefix/drive_c
ln -s Program\ Files/Microsoft\ Visual\ Studio\ 8/VC
ln -s ../../psdk2003/drive_c/Program\ Files/Microsoft\ Platform\ SDK psdk # Symlink to psdk from other prefix

# Link an important dll, without which the toolchain fails
cd $prefix/drive_c/windows/system32
ln -s ../../Program\ Files/Microsoft\ Visual\ Studio\ 8/Common7/IDE/mspdb80.dll
</pre>

== VC++ Wine wrappers ==
Execute the following command to have a common (exchangeable) WINEPREFIX for the tool chain:
<pre>
echo "$HOME/.local/share/wineprefixes/vc2005express" > $HOME/devel/bin/wineprefix-vc.txt
</pre>
Create the following files:
<pre>
~/devel/bin/cl.sh:
</pre>
<pre>
#!/bin/bash 

export WINEPREFIX=`cat $HOME/devel/bin/wineprefix-vc.txt`
wine c:/VC/bin/cl.exe /I"c:/VC/include" /I"c:/psdk/Include" "$@"
</pre>
<pre>
~/devel/bin/link.sh:
</pre>
<pre>
#!/bin/bash

export WINEPREFIX=`cat $HOME/devel/bin/wineprefix-vc.txt`
wine c:/VC/bin/link.exe /LIBPATH:"c:/VC/lib" /LIBPATH:"c:/psdk/Lib" "$@"
</pre>
<pre>
~/devel/bin/rc.sh:
</pre>
<pre>
#!/bin/bash

export WINEPREFIX=`cat $HOME/devel/bin/wineprefix-vc.txt`
wine c:/VC/bin/rc.exe /I"c:/VC/include" /I"c:/psdk/Include" "$@"
</pre>

and make them executable:
<pre>
chmod +x ~/devel/bin/*
</pre>

== Setting up Code::Blocks ==
* Execute codeblocks
* Go to Settings->Compiler
* Select Microsoft Visual C++ 2005/2008 compiler
* Select Toolchain executables tab
* In Compiler's installation directory, paste /home/<ENTER_YOUR_USERNAME>/devel/bin and modify the Program Files, to have the .sh extensions instead of the default .exe
* In Search directories remove all search directories (the proper ones are already defined in our .sh wrappers)
* Select Build options tab and set Number of processes for parallel builds to more than 1, even if you have 1 core. This is a workaround that enables the "persistent wineserver", which greatly reduces the compilation time.
* Download, open and use [https://sf.net/p/enjomitchsorbit/codeHG Launch MFD] project file (available under launchmfd/LaunchMFD.cbp) as a template
* Download and use in your project the header file launchmfd/afxres.h. This is required for VS Express.
* Change orbiter2016/Orbitersdk/include/Lua to lua
* Add some sources and hit The Compile Button(TM) !

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