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esp-idf/components/esp_common/project_include.cmake
Frantisek Hrbata 5c5d15cfc7 fix: harden build against empty toolchain output
On some Windows systems, antivirus, endpoint-security or DLP/encryption
software intercepts short-lived toolchain processes and strips their
stdout when the build captures it through a pipe, while the same command
prints its output normally when run by hand. The tool exits successfully
but returns nothing, and each build step that reads toolchain output then
failed with a different, cryptic error far from the real cause:

- CMake configuration aborted with "Unknown arguments specified" in
  components/xtensa/project_include.cmake, or "check_expected_tool_version
  invoked with incorrect arguments" in components/esp_common.
- ldgen turned the empty objdump output into an opaque pyparsing
  "Expected 'In archive'" traceback.
- idf_tools.py silently reported the compiler/debugger version as
  "unknown", sending users into a fruitless reinstall loop.

Detect the empty result at each consumer and fail (or warn) with an
actionable message that names the likely cause and the remedy:

- tools/cmake/compiler_query.cmake: new __compiler_query() helper runs a
  compiler query and fails with a clear error on empty or failed output.
  It is a standalone module included by both the cmakev1 and cmakev2
  utilities, since the esp_common and xtensa project_include.cmake that
  call it are shared by both build systems. The xtensa if() arguments are
  now quoted so an empty result no longer collapses into a parse error.
- tools/ldgen/ldgen.py: _run_objdump() rejects empty objdump output, and
  non-empty-but-unparsable section info is caught and re-raised as a clear
  LdGenFailure instead of a raw pyparsing traceback.
- tools/idf_tools.py: empty version output now warns with the cause and
  returns UNKNOWN_VERSION instead of silently reporting "unknown".

Closes https://github.com/espressif/esp-idf/issues/18727

Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
2026-08-05 20:58:36 +08:00

14 lines
517 B
CMake

#
# Warn if the toolchain version doesn't match
#
idf_build_get_property(target IDF_TARGET)
if(NOT (${target} STREQUAL "linux" OR CMAKE_C_COMPILER_ID MATCHES "Clang"))
__compiler_query(toolchain_name ${CMAKE_C_COMPILER} -dumpmachine)
check_expected_tool_version(${toolchain_name} ${CMAKE_C_COMPILER})
endif()
if(NOT ${target} STREQUAL "linux" AND CMAKE_C_COMPILER_ID MATCHES "Clang")
message(WARNING "Building ESP-IDF with clang is an experimental feature and is not yet officially supported.")
endif()