Libretro core built directly from untouched mainline ScummVM source.
ScummVM main repo is included as a submodule. To sync the libretro core it should be sufficient to update the submodule and build.
Submodule updates are generally committed following ScummVM official releases (though it can be updated to any commit upstream, considering that adjustment to core makefiles and sources in src may be required to build). First three fields of core tags are relevant to upstream ScummVM version, last is libretro core revision (e.g. v2.6.1.1 is ScummVM 2.6.1, core revision 1).
Datafiles and themes bundle (scummvm.zip) and core.info files are built automatically based on current submodule source.
To build the core with the default configuration, type in a shell the following:
git clone --recursive https://github.com/libretro/scummvm
cd scummvm
make
Use make all to build the core along with datafiles/themes (scummvm.zip) and core info file (which can be built separately with make datafiles/make infofile).
"Work in progress" engines are not built by default, to include them pass NO_WIP=0 to make.
To crossbuild for specific platforms, pass the relevant platform variable to make (refer to Makefile for supported ones).
To build for Android:
- install android-sdk
- install android-ndk (e.g. through sdkmanager included in android-sdk/cmdline-tools)
- make sure all needed sdk/ndk paths are included in PATH
- type in a shell the following:
git clone --recursive https://github.com/libretro/scummvm
cd scummvm/jni
ndk-build
Core will be built for all available android targets by default
Data files required for certain games and core functions (e.g. virtual keyboard) and default ScummVM GUI themes are bundled during the build process in scummvm.zip file. Libretro core info file is created during build as well.
Extract scummvm.zip and select relevant paths in ScummVM GUI (or modify scummvm.ini accordingly) to load properly needed data files/themes in the core.
Note that both datafiles and themes included in scummvm.zip need to be consistent with ScummVM version (e.g. v2.6.1.x), hence need to be generally rebuilt and replaced for each new version.
All options and configuration of the legacy libretro core are applicable to this one as well, refer to relevant link in Resources.
Some additional options have been added to this core:
- On-screen virtual keyboard (retropad "select" button by default to activate/deactivate)
- Set D-pad cursor acceleration time
Official ScummVM repository readme is here.
Legacy ScummVM libretro core documentation is here.