Import("env")
+# This is needed to get INT32_MIN etc. macros defined
+env = env.Clone()
+env.Append(CPPDEFINES = ['__STDC_LIMIT_MACROS'])
+
# Copy the files to .cxx extension in order to force C++ build.
c = Copy("$TARGET", "$SOURCE")
env.Command("pb_encode.cxx", "#../pb_encode.c", c)