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pigweed / pigweed / pigweed / 919d1831a6f337ed62661e0133cd6807284038b4
commit919d1831a6f337ed62661e0133cd6807284038b4[log] [tgz]
authorWyatt Hepler <hepler@google.com>Tue Sep 27 20:00:39 2022 +0000
committerCQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>Tue Sep 27 20:00:39 2022 +0000
treeaa77ddec85b134e783c36c010c63dab0ff514f9c
parent71e8310be2e24d62dc8de93d0cd7ab85f02e33ad [diff]
pw_toolchain: Implement Newlib OS interface functions

Starting in arm-none-eabi-gcc 11.3, the compiler outputs warnings if
Newlib OS interface functions are called but not implemented. A default
that returns an error is used in that case. The Newlib OS interface is
documented at https://sourceware.org/newlib/libc.html#Stubs.

Most of the Newlib OS interface functions should never be called in
Pigweed. Implement these functions but have them invoke an undefined
function to force a linker error if they are used.

In addition to implementing the OS interface, wrap a few unnecessary
Newlib functions that would otherwise cause several OS interface
functions to be linked in. Abort if these functions are called.

Change-Id: Iee0a73598b6daed175ca8328053386460b85b74a
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/112311
Commit-Queue: Wyatt Hepler <hepler@google.com>
Reviewed-by: Armando Montanez <amontanez@google.com>
7 files changed
tree: aa77ddec85b134e783c36c010c63dab0ff514f9c
  1. .allstar/
  2. .vscode/
  3. build_overrides/
  4. docker/
  5. docs/
  6. pw_allocator/
  7. pw_analog/
  8. pw_android_toolchain/
  9. pw_arduino_build/
  10. pw_assert/
  11. pw_assert_basic/
  12. pw_assert_log/
  13. pw_assert_tokenized/
  14. pw_assert_zephyr/
  15. pw_base64/
  16. pw_bloat/
  17. pw_blob_store/
  18. pw_bluetooth/
  19. pw_bluetooth_hci/
  20. pw_boot/
  21. pw_boot_cortex_m/
  22. pw_build/
  23. pw_build_info/
  24. pw_build_mcuxpresso/
  25. pw_bytes/
  26. pw_checksum/
  27. pw_chrono/
  28. pw_chrono_embos/
  29. pw_chrono_freertos/
  30. pw_chrono_stl/
  31. pw_chrono_threadx/
  32. pw_chrono_zephyr/
  33. pw_cli/
  34. pw_compilation_testing/
  35. pw_console/
  36. pw_containers/
  37. pw_cpu_exception/
  38. pw_cpu_exception_cortex_m/
  39. pw_crypto/
  40. pw_digital_io/
  41. pw_docgen/
  42. pw_doctor/
  43. pw_env_setup/
  44. pw_file/
  45. pw_function/
  46. pw_fuzzer/
  47. pw_hdlc/
  48. pw_hex_dump/
  49. pw_i2c/
  50. pw_i2c_mcuxpresso/
  51. pw_ide/
  52. pw_interrupt/
  53. pw_interrupt_cortex_m/
  54. pw_interrupt_zephyr/
  55. pw_kvs/
  56. pw_libc/
  57. pw_log/
  58. pw_log_android/
  59. pw_log_basic/
  60. pw_log_null/
  61. pw_log_rpc/
  62. pw_log_string/
  63. pw_log_tokenized/
  64. pw_log_zephyr/
  65. pw_malloc/
  66. pw_malloc_freelist/
  67. pw_metric/
  68. pw_minimal_cpp_stdlib/
  69. pw_module/
  70. pw_multisink/
  71. pw_package/
  72. pw_persistent_ram/
  73. pw_polyfill/
  74. pw_preprocessor/
  75. pw_presubmit/
  76. pw_protobuf/
  77. pw_protobuf_compiler/
  78. pw_random/
  79. pw_result/
  80. pw_ring_buffer/
  81. pw_router/
  82. pw_rpc/
  83. pw_rust/
  84. pw_snapshot/
  85. pw_software_update/
  86. pw_span/
  87. pw_spi/
  88. pw_status/
  89. pw_stm32cube_build/
  90. pw_stream/
  91. pw_string/
  92. pw_symbolizer/
  93. pw_sync/
  94. pw_sync_baremetal/
  95. pw_sync_embos/
  96. pw_sync_freertos/
  97. pw_sync_stl/
  98. pw_sync_threadx/
  99. pw_sync_zephyr/
  100. pw_sys_io/
  101. pw_sys_io_arduino/
  102. pw_sys_io_baremetal_lm3s6965evb/
  103. pw_sys_io_baremetal_stm32f429/
  104. pw_sys_io_emcraft_sf2/
  105. pw_sys_io_mcuxpresso/
  106. pw_sys_io_stdio/
  107. pw_sys_io_stm32cube/
  108. pw_sys_io_zephyr/
  109. pw_system/
  110. pw_target_runner/
  111. pw_thread/
  112. pw_thread_embos/
  113. pw_thread_freertos/
  114. pw_thread_stl/
  115. pw_thread_threadx/
  116. pw_tls_client/
  117. pw_tls_client_boringssl/
  118. pw_tls_client_mbedtls/
  119. pw_tokenizer/
  120. pw_tool/
  121. pw_toolchain/
  122. pw_trace/
  123. pw_trace_tokenized/
  124. pw_transfer/
  125. pw_unit_test/
  126. pw_varint/
  127. pw_watch/
  128. pw_web/
  129. pw_work_queue/
  130. targets/
  131. third_party/
  132. ts/
  133. zephyr/
  134. .dockerignore ⇨ .gitignore
  135. activate.sh ⇨ bootstrap.sh
  136. .bazelignore
  137. .bazelrc
  138. .clang-format
  139. .clang-tidy
  140. .eslintrc.json
  141. .gitattributes
  142. .gitignore
  143. .gn
  144. .prettierrc.js
  145. .pw_ide.yaml
  146. .pylintrc
  147. activate.bat
  148. Android.bp
  149. AUTHORS
  150. bootstrap.bat
  151. bootstrap.sh
  152. BUILD.bazel
  153. BUILD.gn
  154. BUILDCONFIG.gn
  155. CMakeLists.txt
  156. jest.config.ts
  157. Kconfig.zephyr
  158. LICENSE
  159. modules.gni
  160. OWNERS
  161. package-lock.json
  162. package.json
  163. PIGWEED_MODULES
  164. PW_PLUGINS
  165. README.md
  166. rollup.config.js
  167. tsconfig.json
  168. WORKSPACE
README.md

Pigweed

Pigweed is an open source collection of embedded-targeted libraries–or as we like to call them, modules. These modules are building blocks and infrastructure that enable faster and more reliable development on small-footprint MMU-less 32-bit microcontrollers like the STMicroelectronics STM32L452 or the Nordic nRF52832.

For more information please see our website: https://pigweed.dev/.

Links