mirror of
https://github.com/mikecarper/MeshCore.git
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42 lines
1.5 KiB
Python
42 lines
1.5 KiB
Python
Import("env")
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# This script is loaded as a ``pre:`` extra script. The Nordic platform's
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# builder selects binutils ar/ranlib later while it creates the library build
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# actions. Those tools do not generate the plugin index required by GNU LTO,
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# which leaves the final link with hundreds of false "undefined reference"
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# errors. Intercept that later replacement so every nRF52 archive is built
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# with GCC's plugin-aware wrappers.
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_replace = env.Replace
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def _replace_with_lto_archivers(*args, **kwargs):
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if kwargs.get("AR") == "arm-none-eabi-ar":
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kwargs["AR"] = "arm-none-eabi-gcc-ar"
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if kwargs.get("RANLIB") == "arm-none-eabi-ranlib":
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kwargs["RANLIB"] = "arm-none-eabi-gcc-ranlib"
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return _replace(*args, **kwargs)
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env.Replace = _replace_with_lto_archivers
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# GCC runs the final whole-program passes while linking. PlatformIO supplies
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# the project flags to compilation only, so forward the size policy explicitly
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# to that final LTO invocation as well. One partition also avoids GCC 14
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# generating out-of-range Thumb literal loads in large nRF52 images.
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env.Append(LINKFLAGS=[
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"-Oz",
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"-flto",
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"-flto-partition=one",
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"-fno-inline-small-functions",
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"-fipa-pta",
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"-fmerge-all-constants",
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"-fno-ipa-cp-clone",
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"-fno-partial-inlining",
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"-fno-jump-tables",
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"-fno-tree-switch-conversion",
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"-fno-semantic-interposition",
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"-fno-unwind-tables",
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"-fno-asynchronous-unwind-tables",
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"-fno-schedule-insns2",
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])
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