mrubyの実行 macOS 10.12.3

mrubyをダウンロードした。 mruby-1.2.0.tar.gz

展開

tar zxvf mruby-1.2.0.tar.gz

ビルド

cd mruby
ruby minirake

mrubyでコンパイル

sample.cpp作る

#include <stdlib.h>
#include <stdio.h>
#include "mruby.h"
#include "mruby/compile.h"

int main()
{
    auto mrb = mrb_open();
    auto ai = mrb_gc_arena_save(mrb);
    mrb_load_string(mrb, "5.times.each {|i| p i * i }");
    mrb_gc_arena_restore(mrb, ai);
    mrb_close(mrb);
    return 0;
}

g++ -std=c++11 -Iinclude sample.cpp ../mruby/build/host/lib/libmruby.a

../mruby/build/host/lib/libmruby.aがないと

Undefined symbols for architecture x86_64:
  "_mrb_close", referenced from:
      _main in sample-20efc4.o
  "_mrb_gc_arena_restore", referenced from:
      _main in sample-20efc4.o
  "_mrb_gc_arena_save", referenced from:
      _main in sample-20efc4.o
  "_mrb_load_string", referenced from:
      _main in sample-20efc4.o
  "_mrb_open", referenced from:
      _main in sample-20efc4.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)