visualboyadvance-m/README.md

• Visual Boy Advance - M
  • Building
  • Cross compiling for 32 bit on a 64 bit host
  • Cross Compiling for Win32
  • CMake Options
  • MSys2 Notes
  • Debug Messages
  • Reporting Crash Bugs
  • Contributing

Visual Boy Advance - M

Game Boy Advance Emulator

Homepage and Forum: http://vba-m.com

Windows and Mac builds are in the releases tab.

Daily Ubuntu packages here: https://code.launchpad.net/~sergio-br2/+archive/ubuntu/vbam-trunk

Your distribution may have packages available as well, search for "vbam".

It is also generally very easy to build from source, see below.

Note for Windows Users

If you are having issues, try resetting your config file first.

• open file explorer
• in the location bar, type %USERPROFILE%\AppData\Local and press enter
• delete the directory called visualboyadvance-m

Building

The basic formula to build vba-m is:

cd ~ && mkdir src && cd src
git clone https://github.com/visualboyadvance-m/visualboyadvance-m.git
cd visualboyadvance-m
./installdeps

# ./installdeps will give you build instructions, which will be similar to:

mkdir build && cd build
cmake ..
make -j`nproc`

./installdeps is supported on MSys2, Linux (Debian/Ubuntu, Fedora, Arch or Solus) and Mac OS X (homebrew, macports or fink.)

The Ninja cmake generator is also now supported, including on msys2.

If your OS is not supported, you will need the following:

• C++ compiler and binutils
• make
• CMake
• git
• nasm (optional, for 32 bit builds)

And the following development libraries:

• zlib (required)
• mesa (if using X11 or any OpenGL otherwise)
• ffmpeg (optional, for game recording)
• gettext and gettext tools (optional, with ENABLE_NLS)
• png (required)
• SDL2 (required)
• SFML (optional, for link)
• OpenAL (optional, a sound interface)
• wxWidgets (required, 2.8 is still supported, --enable-stl is supported)

On Linux and similar, you also need the version of GTK your wxWidgets is linked to (usually 2 or 3).

Support for more OSes/distributions for ./installdeps is planned.

Cross compiling for 32 bit on a 64 bit host

./installdeps m32 will set things up to build a 32 bit binary.

This is supported on Fedora, Arch, Solus and MSYS2.

Cross Compiling for Win32

./installdeps takes one optional parameter for cross-compiling target, which may be win32 which is an alias for mingw-w64-i686 to target 32 bit Windows, or mingw-gw64-x86_64 for 64 bit Windows targets.

The target is implicit on MSys2 depending on which MINGW shell you started (the value of $MSYSTEM.) It will not run in the MSys shell.

On Debian/Ubuntu this uses the MXE apt repository and works really well.

On Fedora it can build using the Fedora MinGW packages, albeit with wx 2.8, no OpenGL support, and no Link support for lack of SFML.

On Arch it currently doesn't work at all because the AUR stuff is completely broken, I will at some point redo the arch stuff to use MXE as well.

CMake Options

The CMake code tries to guess reasonable defaults for options, but you can override them on the cmake command with e.g.:

cmake .. -DENABLE_LINK=NO

Of particular interest is making RELEASE or DEBUG builds, the default mode is RELEASE, to make a DEBUG build use something like:

cmake .. -DCMAKE_BUILD_TYPE=Debug

Here is the complete list:

CMake Option	What it Does	Defaults
ENABLE_SDL	Build the SDL port	OFF
ENABLE_WX	Build the wxWidgets port	ON
ENABLE_DEBUGGER	Enable the debugger	ON
ENABLE_NLS	Enable translations	ON
ENABLE_ASM_CORE	Enable x86 ASM CPU cores (BUGGY AND DANGEROUS)	OFF
ENABLE_ASM	Enable the following two ASM options	ON for 32 bit builds
ENABLE_ASM_SCALERS	Enable x86 ASM graphic filters	ON for 32 bit builds
ENABLE_MMX	Enable MMX	ON for 32 bit builds
ENABLE_LINK	Enable GBA linking functionality (requires SFML)	ON
ENABLE_LIRC	Enable LIRC support	OFF
ENABLE_FFMPEG	Enable ffmpeg A/V recording	OFF
ENABLE_LTO	Compile with Link Time Optimization (gcc and clang only)	ON for release build
ENABLE_GBA_LOGGING	Enable extended GBA logging	ON
ENABLE_DIRECT3D	Direct3D rendering for wxWidgets (Windows, NOT IMPLEMENTED!!!)	ON
ENABLE_XAUDIO2	Enable xaudio2 sound output for wxWidgets (Windows only)	ON
ENABLE_OPENAL	Enable OpenAL for the wxWidgets port	OFF
ENABLE_SSP	Enable gcc stack protector support (gcc only)	OFF
ENABLE_ASAN	Enable libasan sanitizers (by default address, only in debug mode)	OFF
VBAM_STATIC	Try link all libs statically (the following are set to ON if ON)	OFF
SDL2_STATIC	Try to link static SDL2 libraries	OFF
SFML_STATIC_LIBRARIES	Try to link static SFML libraries	OFF
FFMPEG_STATIC	Try to link static ffmpeg libraries	OFF
SSP_STATIC	Try to link static gcc stack protector library (gcc only)	OFF except Win32
OPENAL_STATIC	Try to link static OpenAL libraries	OFF
SSP_STATIC	Link gcc stack protecter libssp statically (gcc, with ENABLE_SSP)	OFF

Note for distro packagers, we use the CMake module GNUInstallDirs to configure installation directories.

MSys2 Notes

To run the resulting binary, you can simply type:

./visualboyadvance-m

in the shell where you built it.

If you built with -DCMAKE_BUILD_TYPE=Debug, you will get a console app and will see debug messages, even in mintty.

If you want to start the binary from e.g. a shortcut or Explorer, you will need to put c:\msys64\mingw32\bin for 32 bit builds and c:\msys64\mingw64\bin for 64 bit builds in your PATH (to edit system PATH, go to Control Panel -> System -> Advanced system settings -> Environment Variables.)

If you want to package the binary, you will need to include the MinGW DLLs it depends on, they can install to the same directory as the binary.

For our own builds, we use MXE to make static builds.

Debug Messages

We have an override for wxLogDebug() to make it work even in non-debug builds of wx and on windows, even in mintty. Using this function for console debug messages is recommended.

It works like printf(), e.g.:

int foo = 42;
wxLogDebug(wxT("the value of foo = %d"), foo);

Reporting Crash Bugs

If the emulator crashes and you wish to report the bug, a backtrace made with debug symbols would be immensely helpful.

To generate one (on Linux and MSYS2) first build in debug mode by invoking cmake as:

cmake .. -DCMAKE_BUILD_TYPE=Debug

After you've reproduced the crash, you need the core dump file, you may need to do something such as:

ulimit -c unlimited

in your shell to enable coredump files.

This post explains how to retrieve core dump on Fedora Linux (and possibly other distributions.)

Once you have the core dump file, open it with gdb, for example:

gdb -c core ./visualboyadvance-m

In the gdb shell, to print the backtrace, type:

bt

This may be a bit of a hassle, but it helps us out immensely.

Contributing

Please keep in mind that this app needs to run on Windows, Linux and macOS at the very least, so code should be portable and/or use the appropriate #ifdefs and the like when needed.

Please try to craft a good commit message, this post by the great tpope explains how to do so: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html

If you have multiple small commits for a change, please try to use git rebase -i (interactive rebase) to squash them into one or a few logical commits (with good commit messages!) See: https://git-scm.com/book/en/v2/Git-Tools-Rewriting-History if you are new to this.