Fails to build with tcc(Tiny C Compiler)

[stalbordboat]

I wrote this build task for the tcc toolchain. It's just a modified gcc toolchain:

MRuby::Toolchain.new(:tcc) do |conf, params|
  default_command = 'tcc'
  compiler_flags = %w(-g -O3 -Wall -Wundef)
  c_mandatory_flags = %w(-std=gnu99)
  compile_opt = '%{flags} -o "%{outfile}" "%{infile}"'

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

When it reaches the point of building mrbc(linking it with libmruby_core.a) it fails and give me this error:

LD    build/host/mrbc/bin/mrbc 
tcc: error: undefined symbol 'etext'
tcc: error: undefined symbol 'edata'

any idea what's going on here? Thank you in advance for any help!

[dearblue]

Try adding conf.defines << "MRB_NO_DEFAULT_RO_DATA_P" in your build configuration file.

For other related settings, please check https://github.com/mruby/mruby/blob/3.3.0/doc/guides/mrbconf.md#reduce-heap-memory-configuration.

If you would like to know more about the implementation details (source code), please check https://github.com/mruby/mruby/blob/3.3.0/include/mruby/value.h#L423-L457.

[stalbordboat]

Thank you so much for your help!