fae64f79bb
Ref. https://github.com/espressif/esp-idf/issues/1684 Also, for full RTTI support, libstdc++.a in the toolchain should be built in both with RTTI and w/o RTTI options. Multilib with -fno-rtti flag is used for that. 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.
247 lines
9.9 KiB
Text
247 lines
9.9 KiB
Text
#
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# For a description of the syntax of this configuration file,
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# see kconfig/kconfig-language.txt.
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#
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mainmenu "Espressif IoT Development Framework Configuration"
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# Hidden option to support checking for this specific target in C code and Kconfig files
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config IDF_TARGET_ESP32
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bool
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default "y" if IDF_TARGET="esp32"
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default "n"
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config IDF_CMAKE
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bool
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option env="IDF_CMAKE"
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config IDF_TARGET_ENV
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# A proxy to get environment variable $IDF_TARGET
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string
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option env="IDF_TARGET"
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config IDF_TARGET
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# This option records the IDF target when sdkconfig is generated the first time.
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# It is not updated if environment variable $IDF_TARGET changes later, and
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# the build system is responsible for detecting the mismatch between
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# CONFIG_IDF_TARGET and $IDF_TARGET.
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string
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default "IDF_TARGET_NOT_SET" if IDF_TARGET_ENV=""
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default IDF_TARGET_ENV
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config IDF_FIRMWARE_CHIP_ID
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hex
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default 0x0000 if IDF_TARGET="esp32"
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default 0xFFFF
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menu "SDK tool configuration"
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config SDK_TOOLPREFIX
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string "Compiler toolchain path/prefix"
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default "xtensa-esp32-elf-"
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help
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The prefix/path that is used to call the toolchain. The default setting assumes
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a crosstool-ng gcc setup that is in your PATH.
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config SDK_PYTHON
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string "Python 2 interpreter"
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depends on !IDF_CMAKE
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default "python"
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help
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The executable name/path that is used to run python. On some systems Python 2.x
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may need to be invoked as python2.
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(Note: This option is used with the legacy GNU Make build system only.)
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config SDK_MAKE_WARN_UNDEFINED_VARIABLES
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bool "'make' warns on undefined variables"
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depends on !IDF_CMAKE
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default "y"
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help
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Adds --warn-undefined-variables to MAKEFLAGS. This causes make to
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print a warning any time an undefined variable is referenced.
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This option helps find places where a variable reference is misspelled
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or otherwise missing, but it can be unwanted if you have Makefiles which
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depend on undefined variables expanding to an empty string.
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(Note: this option is used with the legacy GNU Make build system only.)
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endmenu # SDK tool configuration
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source "$COMPONENT_KCONFIGS_PROJBUILD"
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menu "Compiler options"
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choice COMPILER_OPTIMIZATION
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prompt "Optimization Level"
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default COMPILER_OPTIMIZATION_LEVEL_DEBUG
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help
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This option sets compiler optimization level (gcc -O argument).
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- for "Release" setting, -Os flag is added to CFLAGS.
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- for "Debug" setting, -Og flag is added to CFLAGS.
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"Release" with -Os produces smaller & faster compiled code but it
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may be harder to correlated code addresses to source files when debugging.
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To add custom optimization settings, set CFLAGS and/or CPPFLAGS
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in project makefile, before including $(IDF_PATH)/make/project.mk. Note that
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custom optimization levels may be unsupported.
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config COMPILER_OPTIMIZATION_LEVEL_DEBUG
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bool "Debug (-Og)"
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config COMPILER_OPTIMIZATION_LEVEL_RELEASE
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bool "Release (-Os)"
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endchoice
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choice COMPILER_OPTIMIZATION_ASSERTION_LEVEL
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prompt "Assertion level"
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default COMPILER_OPTIMIZATION_ASSERTIONS_ENABLE
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help
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Assertions can be:
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- Enabled. Failure will print verbose assertion details. This is the default.
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- Set to "silent" to save code size (failed assertions will abort() but user
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needs to use the aborting address to find the line number with the failed assertion.)
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- Disabled entirely (not recommended for most configurations.) -DNDEBUG is added
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to CPPFLAGS in this case.
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config COMPILER_OPTIMIZATION_ASSERTIONS_ENABLE
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prompt "Enabled"
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bool
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help
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Enable assertions. Assertion content and line number will be printed on failure.
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config COMPILER_OPTIMIZATION_ASSERTIONS_SILENT
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prompt "Silent (saves code size)"
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bool
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help
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Enable silent assertions. Failed assertions will abort(), user needs to
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use the aborting address to find the line number with the failed assertion.
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config COMPILER_OPTIMIZATION_ASSERTIONS_DISABLE
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prompt "Disabled (sets -DNDEBUG)"
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bool
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help
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If assertions are disabled, -DNDEBUG is added to CPPFLAGS.
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endchoice # assertions
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menuconfig COMPILER_CXX_EXCEPTIONS
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bool "Enable C++ exceptions"
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default n
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help
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Enabling this option compiles all IDF C++ files with exception support enabled.
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Disabling this option disables C++ exception support in all compiled files, and any libstdc++ code
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which throws an exception will abort instead.
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Enabling this option currently adds an additional ~500 bytes of heap overhead
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when an exception is thrown in user code for the first time.
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config COMPILER_CXX_EXCEPTIONS_EMG_POOL_SIZE
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int "Emergency Pool Size"
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default 0
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depends on COMPILER_CXX_EXCEPTIONS
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help
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Size (in bytes) of the emergency memory pool for C++ exceptions. This pool will be used to allocate
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memory for thrown exceptions when there is not enough memory on the heap.
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config COMPILER_CXX_RTTI
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# Invisible option, until the toolchain with RTTI support is released.
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# Use prompt "Enable C++ run-time type info (RTTI)" when updating.
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bool
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help
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Enabling this option compiles all C++ files with RTTI support enabled.
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This increases binary size (typically by tens of kB) but allows using
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dynamic_cast conversion and typeid operator.
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choice COMPILER_STACK_CHECK_MODE
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prompt "Stack smashing protection mode"
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default COMPILER_STACK_CHECK_MODE_NONE
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help
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Stack smashing protection mode. Emit extra code to check for buffer overflows, such as stack
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smashing attacks. This is done by adding a guard variable to functions with vulnerable objects.
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The guards are initialized when a function is entered and then checked when the function exits.
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If a guard check fails, program is halted. Protection has the following modes:
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- In NORMAL mode (GCC flag: -fstack-protector) only functions that call alloca, and functions with
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buffers larger than 8 bytes are protected.
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- STRONG mode (GCC flag: -fstack-protector-strong) is like NORMAL, but includes additional functions
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to be protected -- those that have local array definitions, or have references to local frame
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addresses.
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- In OVERALL mode (GCC flag: -fstack-protector-all) all functions are protected.
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Modes have the following impact on code performance and coverage:
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- performance: NORMAL > STRONG > OVERALL
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- coverage: NORMAL < STRONG < OVERALL
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config COMPILER_STACK_CHECK_MODE_NONE
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bool "None"
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config COMPILER_STACK_CHECK_MODE_NORM
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bool "Normal"
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config COMPILER_STACK_CHECK_MODE_STRONG
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bool "Strong"
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config COMPILER_STACK_CHECK_MODE_ALL
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bool "Overall"
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endchoice
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config COMPILER_STACK_CHECK
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bool
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default !COMPILER_STACK_CHECK_MODE_NONE
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help
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Stack smashing protection.
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config COMPILER_WARN_WRITE_STRINGS
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bool "Enable -Wwrite-strings warning flag"
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default "n"
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help
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Adds -Wwrite-strings flag for the C/C++ compilers.
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For C, this gives string constants the type ``const char[]`` so that
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copying the address of one into a non-const ``char *`` pointer
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produces a warning. This warning helps to find at compile time code
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that tries to write into a string constant.
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For C++, this warns about the deprecated conversion from string
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literals to ``char *``.
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config COMPILER_DISABLE_GCC8_WARNINGS
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bool "Disable new warnings introduced in GCC 6 - 8"
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default "n"
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help
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Enable this option if using GCC 6 or newer, and wanting to disable warnings which don't appear with
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GCC 5.
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endmenu # Compiler Options
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menu "Component config"
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source "$COMPONENT_KCONFIGS"
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endmenu
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menu "Compatibility options"
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config LEGACY_INCLUDE_COMMON_HEADERS
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bool "Include headers accross components as before IDF v4.0"
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default n
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help
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Soc, esp32, and driver components, the most common
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components. Some header of these components are included
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implicitly by headers of other components before IDF v4.0.
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It's not required for high-level components, but still
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included through long header chain everywhere.
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This is harmful to the modularity. So it's changed in IDF
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v4.0.
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You can still include these headers in a legacy way until it
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is totally deprecated by enable this option.
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endmenu #Compatibility options
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