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Use LIBC_PICOLIBC_CXA_ATEXIT to keep this name in the same 'namespace' as the other picolibc config names. Enable retargetable locking by default. This allows the few locks in picolibc to be implemented by the execution environment, rather than disabling the locking code. Signed-off-by: Keith Packard <keithp@keithp.com>
123 lines
3.9 KiB
Plaintext
123 lines
3.9 KiB
Plaintext
# picolibc options
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## depends on BARE_METAL && CONFIGURE_has_meson && CONFIGURE_has_ninja
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## help This option adds Picolibc to an existing configuration which may have
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## help a C library, allowing you to install both and select between them
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## help when compiling applications using the toolchain
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## help
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## help Picolibc is a C library intended for use on embedded systems. It is a
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## help conglomeration of several library parts, all under BSD-compatible software
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## help licenses that make them easily usable on embedded products.
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config LIBC_PICOLIBC_CXA_ATEXIT
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def_bool y
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select LIBC_PROVIDES_CXA_ATEXIT
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config LIBC_PICOLIBC_TARGET_CFLAGS
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string
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prompt "Target CFLAGS for picolibc"
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default ""
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help
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Used to add specific options when compiling the target libraries
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(eg. -ffunction-sections -fdata-sections), which can't be defined
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in global TARGET_CFLAGS, because they shall be not used for the
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gcc target libraries.
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Note: Both TARGET_CFLAGS and LIBC_PICOLIBC_TARGET_CFLAGS are used
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to compile the libraries.
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Leave blank if you don't know better.
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config LIBC_PICOLIBC_IO_C99FMT
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bool
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prompt "Enable IOs on C99 formats"
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default y
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help
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Enable support for IOs on C99 formats.
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config LIBC_PICOLIBC_REGISTER_FINI
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bool
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prompt "Enable finalization function registration using atexit"
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help
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Enable finalization function registration using atexit.
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config LIBC_PICOLIBC_ATEXIT_DYNAMIC_ALLOC
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bool
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prompt "Enable dynamic allocation of atexit entries"
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help
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Enable dynamic allocation of atexit entries.
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config LIBC_PICOLIBC_GLOBAL_ATEXIT
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bool
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prompt "Enable atexit data structure as global variable"
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help
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Enable atexit data structure as global variable, instead
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of being thread-local.
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config LIBC_PICOLIBC_LITE_EXIT
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bool
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prompt "Enable lite exit"
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default y
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help
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Enable lite exit, a size-reduced implementation of exit that doesn't
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invoke clean-up functions such as _fini or global destructors.
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config LIBC_PICOLIBC_MULTITHREAD
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bool
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prompt "Enable support for multiple threads"
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default y
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help
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Enable support for multiple threads.
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config LIBC_PICOLIBC_RETARGETABLE_LOCKING
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bool
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prompt "Enable retargetable locking"
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default y
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help
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Enable retargetable locking to allow the operating system to override
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the dummy lock functions defined within picolibc.
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config LIBC_PICOLIBC_EXTRA_SECTIONS
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bool
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prompt "Place each function & data element in their own section"
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help
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Place each function & data symbol in their own section. This allows
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the linker to garbage collect unused symbols at link time.
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config LIBC_PICOLIBC_ENABLE_TARGET_OPTSPACE
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bool
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prompt "Optimize picolibc for size"
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default y
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help
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Pass --enable-target-optspace to picolibc configure.
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This will compile picolibc with -Os.
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config LIBC_PICOLIBC_LTO
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bool
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prompt "Enable Link Time Optimization"
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depends on CC_GCC_USE_LTO
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help
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Builds the libraries with -flto to enable more aggressive link time
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optimization. You will need to add -flto-partition=one to your
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application's link line to keep the RETURN assembler macro together
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with it's consumers.
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config LIBC_PICOLIBC_NANO_MALLOC
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bool
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prompt "Enable Nano Malloc"
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default y
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help
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PICOLIBC has two implementations of malloc family's functions, one in
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`mallocr.c' and the other one in `nano-mallocr.c'. This options
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enables the nano-malloc implementation, which is for small systems
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with very limited memory. Note that this implementation does not
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support `--enable-malloc-debugging' any more.
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config LIBC_PICOLIBC_EXTRA_CONFIG_ARRAY
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string
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prompt "Extra config for picolibc"
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default ""
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help
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Extra flags to pass to meson when configuring picolibc.
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