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-rw-r--r--src/mruby_core.rake3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mruby_core.rake b/src/mruby_core.rake
index 2e6abfcd3..87759aa61 100644
--- a/src/mruby_core.rake
+++ b/src/mruby_core.rake
@@ -40,6 +40,9 @@ EOS
file "#{current_build_dir}/y.tab.cxx" => "#{current_build_dir}/y.tab.c" do |t|
File.open(t.name, 'w') do |f|
f.write <<EOS
+#define __STDC_CONSTANT_MACROS
+#define __STDC_LIMIT_MACROS
+
extern "C" {
#include "#{t.prerequisites.first}"
}