Merge branch 'fix/harden_empty_toolchain_output_v5.5' into 'release/v5.5'

fix: harden build against empty toolchain output (v5.5)

See merge request espressif/esp-idf!51645

components/esp_common/project_include.cmake

@@ -2,11 +2,7 @@
 # Warn if the toolchain version doesn't match
 #
 if(NOT (${target} STREQUAL "linux" OR CMAKE_C_COMPILER_ID MATCHES "Clang"))
-    execute_process(
-        COMMAND ${CMAKE_C_COMPILER} -dumpmachine
-        OUTPUT_VARIABLE toolchain_name
-        OUTPUT_STRIP_TRAILING_WHITESPACE
-        ERROR_QUIET)
+    __compiler_query(toolchain_name ${CMAKE_C_COMPILER} -dumpmachine)
     check_expected_tool_version(${toolchain_name} ${CMAKE_C_COMPILER})
 endif()
 

components/xtensa/project_include.cmake

@@ -2,20 +2,13 @@
 if(CMAKE_C_COMPILER_ID MATCHES "Clang")
     # without '--target' option 'clang -dumpmachine' prints default target arch and it might be not Xtensa
     # so use `-print-targets` option
-    execute_process(
-        COMMAND ${CMAKE_C_COMPILER} -print-targets
-        OUTPUT_VARIABLE dump_machine
-    )
+    __compiler_query(dump_machine ${CMAKE_C_COMPILER} -print-targets)
 else()
-    execute_process(
-        COMMAND ${CMAKE_C_COMPILER} -dumpmachine
-        OUTPUT_VARIABLE dump_machine
-        OUTPUT_STRIP_TRAILING_WHITESPACE
-    )
+    __compiler_query(dump_machine ${CMAKE_C_COMPILER} -dumpmachine)
 endif()
 message(STATUS "Compiler supported targets: ${dump_machine}")
 
-if(NOT (${CMAKE_SYSTEM_NAME} STREQUAL "Generic" AND ${dump_machine} MATCHES xtensa))
+if(NOT ("${CMAKE_SYSTEM_NAME}" STREQUAL "Generic" AND "${dump_machine}" MATCHES "xtensa"))
     message(FATAL_ERROR "Internal error, toolchain has not been set correctly by project "
         "(or an invalid CMakeCache.txt file has been generated somehow)")
 endif()