mirror of
https://github.com/ilyakooo0/nixpkgs.git
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e36b4564d2
This commit: - Bumps the nanopb version - Adds all runtime configuration options - Implements proper cross-compilation support which is the main use-case of the library. - Uses newer `finalAttrs` form of `mkDerivation` to allow for easier attribute overrides. The cross-compilation support is achieved by splitting the package into two sub-packages consisting of the build-time generator and the runtime library. Nanopb explicitely supports this by providing specialized `GENERATOR` and `RUNTIME` CMake configuration options. The top-level package uses `propagatedNativeBuildInputs` and `propagatedBuildInputs` to propagate the sub-packages and also adds convenient symlinks to make certain use cases easier. == GENERATOR == The generator is a mostly ready-to-be-packaged python module tree. We patch the library to also include the missing `__init__.py` and we also fix the `PYTHON_INSTDIR` variable to follow best practice and to prevent the library from attempting to install to a global directory. We package the python module using `buildPythonPackage` and internally override python in order to wrap the `nanopb_generator.py` executable. We do *not* wrap `nanob_generator.py` due to it also being imported directly from python when used through `protoc-gen-nanopb`. == RUNTIME == The runtime is a simple library that consists of the common functionality among generated headers/sources. It is configured through `preprocessor definitions` and consumer projects *must* be compiled with the same definitions. This is currently achieved by exposing all configuration options through the top-level overrides and patching the CMakeLists.txt so that the definitions are added to the to-be-installed CMake targets as PUBLIC properties.
70 lines
2.0 KiB
Nix
70 lines
2.0 KiB
Nix
{ cmake
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, lib
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, stdenv
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, protobuf
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, python3
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, src
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, version
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, enableMalloc
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, noPackedStructs
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, maxRequiredFields
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, field32bit
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, noErrmsg
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, bufferOnly
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, systemHeader
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, without64bit
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, encodeArraysUnpacked
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, convertDoubleFloat
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, validateUtf8
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, littleEndian8bit
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, c99StaticAssert
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, noStaticAssert
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}:
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stdenv.mkDerivation
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({
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pname = "nanopb-runtime";
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inherit src version;
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nativeBuildInputs = [ cmake protobuf python3 ];
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patchPhase =
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let
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compile_definitions = target: ''
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target_compile_definitions(${target}
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PUBLIC
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${lib.concatStringsSep "\n\t" (map (x: "PB_${x.flag}")
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(builtins.filter (x: x.cond) [
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{ cond = enableMalloc; flag = "ENABLE_MALLOC=1"; }
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{ cond = noPackedStructs; flag = "NO_PACKED_STRUCTS=1"; }
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{ cond = maxRequiredFields != null; flag = "MAX_REQUIRED_FIELDS=${maxRequiredFields}"; }
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{ cond = field32bit; flag = "FIELD_32BIT=1"; }
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{ cond = noErrmsg; flag = "NO_ERRMSG=1"; }
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{ cond = bufferOnly; flag = "BUFFER_ONLY=1"; }
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{ cond = systemHeader != null; flag = "SYSTEM_HEADER=${systemHeader}"; }
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{ cond = without64bit; flag = "WITHOUT_64BIT=1"; }
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{ cond = encodeArraysUnpacked; flag = "ENCODE_ARRAYS_UNPACKED=1"; }
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{ cond = convertDoubleFloat; flag = "CONVERT_DOUBLE_FLOAT=1"; }
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{ cond = validateUtf8; flag = "VALIDATE_UTF8=1"; }
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{ cond = littleEndian8bit; flag = "LITTLE_ENDIAN_8BIT=1"; }
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{ cond = c99StaticAssert; flag = "C99_STATIC_ASSERT=1"; }
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{ cond = noStaticAssert; flag = "NO_STATIC_ASSERT=1"; }
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]))}
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)
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'';
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in
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''
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cat << EOF >> CMakeLists.txt
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${compile_definitions "protobuf-nanopb"}
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${compile_definitions "protobuf-nanopb-static"}
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EOF
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'';
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cmakeFlags = [
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"-DBUILD_SHARED_LIBS=ON"
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"-DBUILD_STATIC_LIBS=ON"
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"-Dnanopb_BUILD_GENERATOR=OFF"
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"-Dnanopb_BUILD_RUNTIME=ON"
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];
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})
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