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# Cross Compiling configuration for the Sega Dreamcast
# This configuration requires KallistiOS (KOS)
# https://dreamcast.wiki
#
# Tested on GNU/Linux, MinGW-w64/MSYS2, Cygwin, macOS and MinGW/MSYS (see below)
#
MRuby::CrossBuild.new("dreamcast") do |conf|
toolchain :gcc
# Support for DreamSDK (based on MinGW/MSYS)
# To compile mruby with DreamSDK, RubyInstaller for Windows should be installed
DREAMSDK_HOME = ENV["DREAMSDK_HOME"]
MSYS_ROOT = !(DREAMSDK_HOME.nil? || DREAMSDK_HOME.empty?) ? "#{DREAMSDK_HOME}/msys/1.0" : ""
# Setting paths
DREAMCAST_PATH = "#{MSYS_ROOT}/opt/toolchains/dc"
KOS_PATH = "#{DREAMCAST_PATH}/kos"
BIN_PATH = "#{DREAMCAST_PATH}/sh-elf/bin"
# C compiler
# Flags were extracted from KallistiOS environment files
conf.cc do |cc|
cc.command = "#{BIN_PATH}/sh-elf-gcc"
cc.include_paths << ["#{KOS_PATH}/include", "#{KOS_PATH}/kernel/arch/dreamcast/include", "#{KOS_PATH}/addons/include", "#{KOS_PATH}/../kos-ports/include"]
cc.flags << ["-O2", "-fomit-frame-pointer", "-ml", "-m4-single-only", "-ffunction-sections", "-fdata-sections", "-Wall", "-g", "-fno-builtin", "-ml", "-m4-single-only", "-Wl,-Ttext=0x8c010000", "-Wl,--gc-sections", "-T#{KOS_PATH}/utils/ldscripts/shlelf.xc", "-nodefaultlibs"]
cc.compile_options = %Q[%{flags} -o "%{outfile}" -c "%{infile}"]
cc.defines << %w(_arch_dreamcast)
cc.defines << %w(_arch_sub_pristine)
end
# C++ compiler
conf.cxx do |cxx|
cxx.command = conf.cc.command.dup
cxx.include_paths = conf.cc.include_paths.dup
cxx.flags = conf.cc.flags.dup
cxx.flags << %w(-fno-rtti -fno-exceptions)
cxx.defines = conf.cc.defines.dup
cxx.compile_options = conf.cc.compile_options.dup
end
# Linker
# There is an issue when making the mruby library with KallistiOS:
# 'newlib_kill.o' and 'newlib_getpid.o' aren't found so they are explicitly
# specified here at least for now.
conf.linker do |linker|
linker.command="#{BIN_PATH}/sh-elf-gcc"
linker.flags << ["#{MSYS_ROOT}/opt/toolchains/dc/kos/kernel/build/newlib_kill.o", "#{MSYS_ROOT}/opt/toolchains/dc/kos/kernel/build/newlib_getpid.o", "-Wl,--start-group -lkallisti -lc -lgcc -Wl,--end-group"]
linker.library_paths << ["#{KOS_PATH}/lib/dreamcast", "#{KOS_PATH}/addons/lib/dreamcast", "#{KOS_PATH}/../kos-ports/lib"]
end
# Archiver
conf.archiver do |archiver|
archiver.command = "#{BIN_PATH}/sh-elf-ar"
archiver.archive_options = 'rcs "%{outfile}" %{objs}'
end
# No executables
conf.bins = []
# Do not build executable test
conf.build_mrbtest_lib_only
# Disable C++ exception
conf.disable_cxx_exception
# Gems from core
# removing mruby-io
conf.gem :core => "mruby-metaprog"
conf.gem :core => "mruby-pack"
conf.gem :core => "mruby-sprintf"
conf.gem :core => "mruby-print"
conf.gem :core => "mruby-math"
conf.gem :core => "mruby-time"
conf.gem :core => "mruby-struct"
conf.gem :core => "mruby-compar-ext"
conf.gem :core => "mruby-enum-ext"
conf.gem :core => "mruby-string-ext"
conf.gem :core => "mruby-numeric-ext"
conf.gem :core => "mruby-array-ext"
conf.gem :core => "mruby-hash-ext"
conf.gem :core => "mruby-range-ext"
conf.gem :core => "mruby-proc-ext"
conf.gem :core => "mruby-symbol-ext"
conf.gem :core => "mruby-random"
conf.gem :core => "mruby-object-ext"
conf.gem :core => "mruby-objectspace"
conf.gem :core => "mruby-fiber"
conf.gem :core => "mruby-enumerator"
conf.gem :core => "mruby-enum-lazy"
conf.gem :core => "mruby-toplevel-ext"
conf.gem :core => "mruby-kernel-ext"
conf.gem :core => "mruby-class-ext"
conf.gem :core => "mruby-compiler"
end
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