esp-idf/components/esp32/project_include.cmake

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CMake
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if(CONFIG_SPIRAM_CACHE_WORKAROUND)
# We do this here as well as in CMakeLists.txt, because targets that
# are not part of the ESP-IDF build system (for cases where a generic
# non-IDF CMakeLists.txt file is imported into a component) don't depend
# on the esp32 component so don't get the extra flag. This handles that case.
idf_build_set_property(COMPILE_OPTIONS "-mfix-esp32-psram-cache-issue" APPEND)
endif()
# Check toolchain is configured properly in cmake
if(NOT ( ${CMAKE_SYSTEM_NAME} STREQUAL "Generic" AND ${CMAKE_C_COMPILER} MATCHES xtensa))
message(FATAL_ERROR "Internal error, toolchain has not been set correctly by project "
"(or an invalid CMakeCache.txt file has been generated somehow)")
endif()
#
# Warn if the toolchain version doesn't match
#
# TODO: make these platform-specific for diff toolchains
get_expected_ctng_version(expected_toolchain expected_gcc)
gcc_version_check("${expected_gcc}")
crosstool_version_check("${expected_toolchain}")