499d087c91
Ref. https://github.com/espressif/esp-idf/issues/1684 This change allows RTTI to be enabled in menuconfig. For full RTTI support, libstdc++.a in the toolchain should be built without -fno-rtti, as it is done now. Generally if libstdc++.a is built with RTTI, applications which do not use RTTI (and build with -fno-rtti) could still include typeinfo structures referenced from STL classes’ vtables. This change works around this, by moving all typeinfo structures from libstdc++.a into a non-loadable section, placed into a non-existent memory region starting at address 0. This can be done because when the application is compiled with -fno-rtti, typeinfo structures are not used at run time. This way, typeinfo structures do not contribute to the application binary size. If the application is build with RTTI support, typeinfo structures are linked into the application .rodata section as usual. Note that this commit does not actually enable RTTI support. The respective Kconfig option is hidden, and will be made visible when the toolchain is updated.
95 lines
3.5 KiB
CMake
95 lines
3.5 KiB
CMake
cmake_minimum_required(VERSION 3.5)
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project(esp-idf C CXX ASM)
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unset(compile_options)
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unset(c_compile_options)
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unset(cxx_compile_options)
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unset(compile_definitions)
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# Add the following build specifications here, since these seem to be dependent
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# on config values on the root Kconfig.
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if(CONFIG_COMPILER_OPTIMIZATION_SIZE)
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list(APPEND compile_options "-Os")
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list(APPEND compile_options "-freorder-blocks")
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elseif(CONFIG_COMPILER_OPTIMIZATION_DEFAULT)
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list(APPEND compile_options "-Og")
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elseif(CONFIG_COMPILER_OPTIMIZATION_NONE)
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list(APPEND compile_options "-O0")
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elseif(CONFIG_COMPILER_OPTIMIZATION_PERF)
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list(APPEND compile_options "-O2")
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endif()
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if(CONFIG_COMPILER_CXX_EXCEPTIONS)
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list(APPEND cxx_compile_options "-fexceptions")
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else()
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list(APPEND cxx_compile_options "-fno-exceptions")
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endif()
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if(CONFIG_COMPILER_CXX_RTTI)
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list(APPEND cxx_compile_options "-frtti")
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else()
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list(APPEND cxx_compile_options "-fno-rtti")
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endif()
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if(CONFIG_COMPILER_DISABLE_GCC8_WARNINGS)
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list(APPEND compile_options "-Wno-parentheses"
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"-Wno-sizeof-pointer-memaccess"
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"-Wno-clobbered")
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# doesn't use GCC_NOT_5_2_0 because idf_set_global_variables was not called before
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if(GCC_NOT_5_2_0)
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list(APPEND compile_options "-Wno-format-overflow"
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"-Wno-stringop-truncation"
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"-Wno-misleading-indentation"
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"-Wno-cast-function-type"
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"-Wno-implicit-fallthrough"
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"-Wno-unused-const-variable"
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"-Wno-switch-unreachable"
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"-Wno-format-truncation"
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"-Wno-memset-elt-size"
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"-Wno-int-in-bool-context")
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endif()
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endif()
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if(CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_DISABLE)
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list(APPEND compile_definitions "-DNDEBUG")
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endif()
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if(CONFIG_COMPILER_STACK_CHECK_MODE_NORM)
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list(APPEND compile_options "-fstack-protector")
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elseif(CONFIG_COMPILER_STACK_CHECK_MODE_STRONG)
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list(APPEND compile_options "-fstack-protector-strong")
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elseif(CONFIG_COMPILER_STACK_CHECK_MODE_ALL)
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list(APPEND compile_options "-fstack-protector-all")
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endif()
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idf_build_set_property(COMPILE_OPTIONS "${compile_options}" APPEND)
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idf_build_set_property(C_COMPILE_OPTIONS "${c_compile_options}" APPEND)
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idf_build_set_property(CXX_COMPILE_OPTIONS "${cxx_compile_options}" APPEND)
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idf_build_set_property(COMPILE_DEFINITIONS "${compile_definitions}" APPEND)
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idf_build_get_property(build_component_targets __BUILD_COMPONENT_TARGETS)
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# Add each component as a subdirectory, processing each component's CMakeLists.txt
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foreach(component_target ${build_component_targets})
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__component_get_property(dir ${component_target} COMPONENT_DIR)
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__component_get_property(_name ${component_target} COMPONENT_NAME)
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__component_get_property(prefix ${component_target} __PREFIX)
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__component_get_property(alias ${component_target} COMPONENT_ALIAS)
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set(COMPONENT_NAME ${_name})
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set(COMPONENT_DIR ${dir})
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set(COMPONENT_ALIAS ${alias})
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set(COMPONENT_PATH ${dir}) # for backward compatibility only, COMPONENT_DIR is preferred
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idf_build_get_property(build_prefix __PREFIX)
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set(__idf_component_context 1)
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if(NOT prefix STREQUAL build_prefix)
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add_subdirectory(${dir} ${prefix}_${_name})
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else()
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add_subdirectory(${dir} ${_name})
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endif()
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set(__idf_component_context 0)
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endforeach()
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