Kconfig: split out compiler options, add them to reference
This commit is contained in:
Ivan Grokhotkov
parent
2f7d327978
commit
5e0a3d99e8
129
Kconfig
129
Kconfig
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@ -35,134 +35,7 @@ endmenu # SDK tool configuration
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source "$COMPONENT_KCONFIGS_PROJBUILD"
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menu "Compiler options"
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choice OPTIMIZATION_COMPILER
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prompt "Optimization Level"
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default 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 OPTIMIZATION_LEVEL_DEBUG
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bool "Debug (-Og)"
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config OPTIMIZATION_LEVEL_RELEASE
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bool "Release (-Os)"
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endchoice
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choice OPTIMIZATION_ASSERTION_LEVEL
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prompt "Assertion level"
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default OPTIMIZATION_ASSERTIONS_ENABLED
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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 OPTIMIZATION_ASSERTIONS_ENABLED
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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 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 OPTIMIZATION_ASSERTIONS_DISABLED
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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 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 which throws
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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 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 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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choice STACK_CHECK_MODE
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prompt "Stack smashing protection mode"
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default STACK_CHECK_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 buffers larger than
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8 bytes are protected.
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- STRONG mode (GCC flag: -fstack-protector-strong) is like NORMAL, but includes additional functions to be protected -- those that
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have local array definitions, or have references to local frame 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 STACK_CHECK_NONE
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bool "None"
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config STACK_CHECK_NORM
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bool "Normal"
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config STACK_CHECK_STRONG
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bool "Strong"
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config STACK_CHECK_ALL
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bool "Overall"
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endchoice
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config STACK_CHECK
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bool
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default !STACK_CHECK_NONE
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help
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Stack smashing protection.
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config 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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endmenu # Compiler Options
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source "$IDF_PATH/Kconfig.compiler"
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menu "Component config"
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source "$COMPONENT_KCONFIGS"
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135
Kconfig.compiler
Normal file
135
Kconfig.compiler
Normal file
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@ -0,0 +1,135 @@
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menu "Compiler options"
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choice OPTIMIZATION_COMPILER
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prompt "Optimization Level"
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default 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 OPTIMIZATION_LEVEL_DEBUG
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bool "Debug (-Og)"
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config OPTIMIZATION_LEVEL_RELEASE
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bool "Release (-Os)"
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endchoice
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choice OPTIMIZATION_ASSERTION_LEVEL
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prompt "Assertion level"
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default OPTIMIZATION_ASSERTIONS_ENABLED
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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 OPTIMIZATION_ASSERTIONS_ENABLED
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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 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 OPTIMIZATION_ASSERTIONS_DISABLED
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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 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 which throws
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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 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 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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choice STACK_CHECK_MODE
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prompt "Stack smashing protection mode"
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default STACK_CHECK_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,
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and functions with buffers larger than 8 bytes are protected.
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- STRONG mode (GCC flag: -fstack-protector-strong) is like NORMAL, but includes
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additional functions to be protected -- those that have local array definitions,
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or have references to local frame 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 STACK_CHECK_NONE
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bool "None"
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config STACK_CHECK_NORM
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bool "Normal"
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config STACK_CHECK_STRONG
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bool "Strong"
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config STACK_CHECK_ALL
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bool "Overall"
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endchoice
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config STACK_CHECK
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bool
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default !STACK_CHECK_NONE
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help
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Stack smashing protection.
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config 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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endmenu # Compiler Options
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@ -122,6 +122,9 @@ def print_all_components():
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process_kconfig_file(kconfig_file_path, heading_level, 'Component config')
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process_kconfig_file(kconfig_file_path + '.projbuild', heading_level, '')
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kconfig_file_path = os.path.join(os.path.curdir, '../..', 'Kconfig.compiler')
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process_kconfig_file(kconfig_file_path, heading_level, '')
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if __name__ == '__main__':
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print_all_components()
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