exp-rs 0.2.0

no_std expression parser, compiler, and evaluation engine for math expressions designed for embedded, with qemu examples
Documentation 
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# To build for QEMU:
# meson setup build-qemu --cross-file qemu_test/qemu_harness/arm-cortex-m7-qemu.ini -Dbuild_target=exp_rs_qemu_tests
# meson compile -C build-qemu
# meson test -C build-qemu

project('exp-rs', 'c', version: '0.1.2', meson_version: '>=1.0.0')

# Set Rust features based on configuration
if get_option('use_f32')
  rust_features = ['f32'] # Use standard malloc/free
else
  rust_features = []
endif

if get_option('custom_cbindgen_alloc')
  rust_features += 'custom_cbindgen_alloc'
endif

if get_option('alloc_tracking')
  rust_features += 'alloc_tracking'
endif

# Determine build profile based on build type
# build_type = get_option('buildtype')
# if build_type == 'debug' or build_type == 'debugoptimized'
#   message('Building in debug mode')
#   cargo_profile = 'debug'
#   cargo_profile_flag = []
# else
#   message('Building in release mode')
#   cargo_profile = 'release'
#   cargo_profile_flag = ['--release']
# endif
cargo_profile = 'release'
cargo_profile_flag = ['--release']
exprs_target_dir = '/'.join([meson.current_build_dir(), 'exp_rs'])
# Build Rust static library using cargo build
if get_option('test_native')
  message(
    'Building for native tests in ' + exprs_target_dir,
  )
  # Native build for host tests
  exp_rs_build = custom_target(
    'cargo_build',
    output: ['libexp_rs.a', 'exp_rs.h'],
    command: [
      'mkdir',
      '-p', exprs_target_dir,
      '&&',
      'cargo',
      'build',
      cargo_profile_flag,
      '--features', ','.join(rust_features),
      '--no-default-features',
      '--target-dir', exprs_target_dir,
      '--manifest-path', meson.current_source_dir() + '/Cargo.toml',
      '--lib', '&&',
      'cp',
      '/'.join([exprs_target_dir, cargo_profile, 'exp_rs.h']),
      '/'.join([exprs_target_dir, cargo_profile, 'libexp_rs.a']),
      meson.current_build_dir(),
    ],
    build_always_stale: false,
    build_by_default: false,
    console: true,
  )
else
  message(
    'Cross-compiling for QEMU tests in '
    + meson.current_build_dir()
    + 'with features:',
  )
  message(
    '--features', ','.join(rust_features),
  )

  exprs_target_dir = '/'.join([meson.current_build_dir(), 'exp_rs'])
  # Cross-compilation build for QEMU tests
  exp_rs_build = custom_target(
    'cargo_build',
    output: ['libexp_rs.a', 'exp_rs.h'],
    command: [
      'cargo',
      'build',
      '-Zbuild-std=core,alloc,compiler_builtins',
      '--target', meson.current_source_dir() + '/targets/cortex-m7-strict.json',
      cargo_profile_flag,
      '--no-default-features',
      '--features', ','.join(rust_features),
      '--target-dir', exprs_target_dir,
      '--manifest-path', meson.current_source_dir() + '/Cargo.toml',
      '--lib', '&&',
      'cp',
      '/'.join([exprs_target_dir, 'cortex-m7-strict', cargo_profile, 'exp_rs.h']),
      '/'.join([exprs_target_dir, 'cortex-m7-strict', cargo_profile, 'libexp_rs.a']),
      meson.current_build_dir(),
    ],
    # depend_files: files(meson.current_source_dir()),
    build_always_stale: false,
    build_by_default: false,
    console: true,
  )
endif

exp_rs_dep = declare_dependency(
  link_with: exp_rs_build[0],
  sources: exp_rs_build[1],
  include_directories: include_directories('./'),
)

# Include the qemu_test subdir if building qemu tests
if get_option('enable_exprs_qemu_tests')
  subdir('qemu_test')
endif

# Include native C tests if building for host system
if get_option('test_native')
  subdir('tests_native_c')
endif