mruby cross compie to arm64

readme.md

Target device:

uname -a

Linux rockchip 4.4.167 #2 SMP PREEMPT Thu Nov 14 12:03:34 CST 2019 aarch64 GNU/Linux

On ubuntu 20.04

sudo apt install gcc-aarch64-linux-gnu
git clone https://github.com/mruby/mruby.git

aarch64-linux-gnu-gcc -o stest -lm -lmruby test/simpletest.c  -I/home/qichunren/arm-hello/mruby/include -L/home/qichunren/arm-hello/mruby/build/rockchip_aarch64/lib   -std=gnu99 -g -O3 -Wall -Wundef -Werror-implicit-function-declaration -Wwrite-strings -DMRB_USE_RATIONAL -DMRB_USE_COMPLEX

build_config.rb

MRuby::Build.new do |conf|
  # load specific toolchain settings
  conf.toolchain

  # Use mrbgems
  # conf.gem 'examples/mrbgems/ruby_extension_example'
  # conf.gem 'examples/mrbgems/c_extension_example' do |g|
  #   g.cc.flags << '-g' # append cflags in this gem
  # end
  # conf.gem 'examples/mrbgems/c_and_ruby_extension_example'
  # conf.gem :core => 'mruby-eval'
  # conf.gem :mgem => 'mruby-onig-regexp'
  # conf.gem :github => 'mattn/mruby-onig-regexp'
  # conf.gem :git => 'git@github.com:mattn/mruby-onig-regexp.git', :branch => 'master', :options => '-v'

  # include the GEM box
  conf.gembox 'default'

  # C compiler settings
  # conf.cc do |cc|
  #   cc.command = ENV['CC'] || 'gcc'
  #   cc.flags = [ENV['CFLAGS'] || %w()]
  #   cc.include_paths = ["#{root}/include"]
  #   cc.defines = %w()
  #   cc.option_include_path = %q[-I"%s"]
  #   cc.option_define = '-D%s'
  #   cc.compile_options = %Q[%{flags} -MMD -o "%{outfile}" -c "%{infile}"]
  # end

  # mrbc settings
  # conf.mrbc do |mrbc|
  #   mrbc.compile_options = "-g -B%{funcname} -o-" # The -g option is required for line numbers
  # end

  # Linker settings
  # conf.linker do |linker|
  #   linker.command = ENV['LD'] || 'gcc'
  #   linker.flags = [ENV['LDFLAGS'] || []]
  #   linker.flags_before_libraries = []
  #   linker.libraries = %w()
  #   linker.flags_after_libraries = []
  #   linker.library_paths = []
  #   linker.option_library = '-l%s'
  #   linker.option_library_path = '-L%s'
  #   linker.link_options = "%{flags} -o "%{outfile}" %{objs} %{libs}"
  # end

  # Archiver settings
  # conf.archiver do |archiver|
  #   archiver.command = ENV['AR'] || 'ar'
  #   archiver.archive_options = 'rs "%{outfile}" %{objs}'
  # end

  # Parser generator settings
  # conf.yacc do |yacc|
  #   yacc.command = ENV['YACC'] || 'bison'
  #   yacc.compile_options = %q[-o "%{outfile}" "%{infile}"]
  # end

  # gperf settings
  # conf.gperf do |gperf|
  #   gperf.command = 'gperf'
  #   gperf.compile_options = %q[-L ANSI-C -C -p -j1 -i 1 -g -o -t -N mrb_reserved_word -k"1,3,$" "%{infile}" > "%{outfile}"]
  # end

  # file extensions
  # conf.exts do |exts|
  #   exts.object = '.o'
  #   exts.executable = '' # '.exe' if Windows
  #   exts.library = '.a'
  # end

  # file separator
  # conf.file_separator = '/'

  # Turn on `enable_debug` for better debugging
  # conf.enable_debug
  conf.enable_bintest
  conf.enable_test
end

MRuby::CrossBuild.new("rockchip_aarch64") do |conf|
  toolchain :gcc

  # C compiler
  conf.cc do |cc|
    cc.command = "/usr/bin/aarch64-linux-gnu-gcc"
    # cc.flags = '-fPIC'
    cc.flags << ["-O2"]
    #cc.flags << ["-mthumb-interwork", "-mthumb", "-O2"]
    puts "##### cc.compile_options:#{cc.compile_options}"
    cc.compile_options = %(%{flags} -o "%{outfile}" -c "%{infile}")
  end

  # # C++ compiler
  conf.cxx do |cxx|
    cxx.command = "/usr/bin/aarch64-linux-gnu-cpp"
    # 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

  conf.archiver do |archiver|
    archiver.command = "/usr/bin/aarch64-linux-gnu-ar"
  end

  # # Linker
  conf.linker do |linker|
    linker.command = "/usr/bin/aarch64-linux-gnu-gcc"
    #linker.flags << ["-mthumb-interwork", "-mthumb", "-specs=gba.specs"]
  end

  # # No executables
  conf.bins = []
  #conf.enable_test
  #conf.enable_bintest

  # # Do not build executable test
  # conf.build_mrbtest_lib_only

  # Disable C++ exception
  conf.disable_cxx_exception

  # Gems from core
  # removing mruby-io
  conf.gembox 'default'
end

simpletest.c

#include "mruby.h"
//#include "mruby/irep.h"

//#include "simplest_mrb.h"

int main(void)
{
  mrb_state *mrb = mrb_open();

  //mrb_load_irep(mrb, simplest_mrb);

  mrb_close(mrb);

  return 0;
}