cross-makefiles is an attempt to provide the means to compile libretro cores to as many platforms as possible, using a Linux distro as the primary building evironment.
It works by providing one Makefile per target platform. Those makefiles work by setting up the building toolchain (CC, CXX etc), including Makefile.common which builds the list of source code files to be compiled, and including Makefile.rules which contains the rules to make the final product.
The makefiles are generated by the mkmake.lua Lua script, and are provided here to help people lacking a Lua interpreter to use them.
The list of host/target platforms supported are:
Makefile.android-*: builds android binaries for each one of the supported ABIs from Linux, Windows and OSX hosts. The host platform is auto-detected.Makefile.linux-*: builds Linux binaries from a Linux host.Makefile.linux_portable-*: builds Linux binaries from a Linux host. The difference from these makefiles to thelinux-*ones is that the later use-Wl,-no-undefinedwhen linking the shared object.Makefile.mingw*: builds Windows binaries from a Windows host.Makefile.wii: builds Wii binaries from Linux, Windows and OSX hosts.Makefile.windows-*: builds Windows binaries from a Linux host.
Building for Android devices needs the Android NDK. Specify the path to the NDK by building with NDK_ROOT_DIR=<path> make -f Makefile.android-<abi>.
Building for Windows from a Windows host needs the mingw-64 package to be installed. Building for the Wii needs the devkitPPC. Specify the path to it by building with DEVKITPPC_ROOT_DIR=<path> make -f Makefile.android-wii.
For usage examples, see 81-libretro. Specifically, the makefiles should be saved in the build folder under the core root folder.