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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>