[Scons-users] Cancel any previous definition via -U using MergeFlags

[Ivan Kravets]

Dear community,

I've received an issue for PlatformIO https://github.com/platformio/platformio/issues/191 , where user reported that SCons doesn't recognise "-U" option using env.MergeFlags().

Is it normal behaviour that SCons passes `-U` options to $CCFLAGS which follows before $CPPDEFINES?

Thanks in advance!

With best regards, Ivan Kravets
   - "Creativity comes from talent and never from knowledge" (c)
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