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35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
#
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# common-cxxflags.py
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# Convenience script to apply customizations to CPP flags
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#
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Import("env")
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env.Append(CXXFLAGS=[
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"-Wno-register"
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#"-Wno-incompatible-pointer-types",
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#"-Wno-unused-const-variable",
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#"-Wno-maybe-uninitialized",
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#"-Wno-sign-compare"
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])
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#
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# Add CPU frequency as a compile time constant instead of a runtime variable
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#
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def add_cpu_freq():
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if 'BOARD_F_CPU' in env:
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env['BUILD_FLAGS'].append('-DBOARD_F_CPU=' + env['BOARD_F_CPU'])
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# Useful for JTAG debugging
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#
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# It will separe release and debug build folders.
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# It useful when we need keep two live versions: one debug, for debugging,
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# other release, for flashing (when upload is not done automatically by jlink/stlink).
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# Without this, PIO will recompile everything twice for any small change.
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if env.GetBuildType() == "debug" and env.get('UPLOAD_PROTOCOL') not in ['jlink', 'stlink']:
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env['BUILD_DIR'] = '$PROJECT_BUILD_DIR/$PIOENV/debug'
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# On some platform, F_CPU is a runtime variable. Since it's used to convert from ns
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# to CPU cycles, this adds overhead preventing small delay (in the order of less than
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# 30 cycles) to be generated correctly. By using a compile time constant instead
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# the compiler will perform the computation and this overhead will be avoided
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add_cpu_freq()
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