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crosstool-ng/config/libc/newlib.in

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Added initial AVR32 support (bare-metal,newlib)
2009-05-22 14:46:18 +00:00
# newlib options
config: fix recursive deps The latest kconfig stuff is more stringent when it comes to validating the dependency of the symbols. It is no longer possible to have a symbol depend on itself (such as our construct for arch/cc/libc/... was doing). Fix our generated-file infrastructure to avoid these situations when the new kconfig stuff will be merged (in a following changeset). Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
2011-05-08 17:02:44 +00:00
## depends on BARE_METAL
Retire obsoleted milestones ... and the code dependent on them, after the latest wave of obsolete package removals. This concludes the glorious history of the original uClibc (non-NG) with lots of kludges removed. There was a choice here, whether to call the resulting libc "uClibc" or "uClibc-ng". I opted in favor of giving uClibc-ng the recognition it deserves, although it had some ripple effect in the ct-ng code. Signed-off-by: Alexey Neyman <stilor@att.net>
2022-01-05 08:37:45 +00:00
## select LIBC_PROVIDES_CXA_ATEXIT
config: fix recursive deps The latest kconfig stuff is more stringent when it comes to validating the dependency of the symbols. It is no longer possible to have a symbol depend on itself (such as our construct for arch/cc/libc/... was doing). Fix our generated-file infrastructure to avoid these situations when the new kconfig stuff will be merged (in a following changeset). Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
2011-05-08 17:02:44 +00:00
## select LIBC_SUPPORT_THREADS_NONE
Unify core passes With libc_headers step before pass-1, there is no need to distinguish pass-1 and pass-2; they are configured identically (note that with the current configuration, core pass-2 is only used for win32 - hence, uses build_libgcc=yes and mode=static). Signed-off-by: Alexey Neyman <stilor@att.net>
2022-02-09 01:25:12 +00:00
## select CC_CORE_NEEDED
Switch gen-kconfig to new framework Also: - Move companion_* to comp_* to match the kconfig symbols - Replace bootstrap with former gen-versions.sh - Fold *.in.2 into their respective first parts; this moves common options to the end - if it is undesirable, inclusion of *.in can be moved where *.in.2 used to be (but that will also move version selection after common options). - Retire addToolVersion.sh (may later replace with a more comprehensive script that tries to download the added tarballs, copy the patches and try to apply them, and create a version.desc). Signed-off-by: Alexey Neyman <stilor@att.net>
2017-07-05 02:19:42 +00:00
config: fix recursive deps The latest kconfig stuff is more stringent when it comes to validating the dependency of the symbols. It is no longer possible to have a symbol depend on itself (such as our construct for arch/cc/libc/... was doing). Fix our generated-file infrastructure to avoid these situations when the new kconfig stuff will be merged (in a following changeset). Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
2011-05-08 17:02:44 +00:00
## help Newlib is a C library intended for use on embedded systems. It is a
## help conglomeration of several library parts, all under free software
## help licenses that make them easily usable on embedded products. Newlib
## help is only available in source form. It can be compiled for a wide
## help array of processors, and will usually work on any architecture with
## help the addition of a few low-level routines.
config: Update kconfig for new CT_GetCustom This commit sort of unifies the kconfigs to handle custom files and directories. Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
2015-11-26 13:07:37 +00:00
Switch gen-kconfig to new framework Also: - Move companion_* to comp_* to match the kconfig symbols - Replace bootstrap with former gen-versions.sh - Fold *.in.2 into their respective first parts; this moves common options to the end - if it is undesirable, inclusion of *.in can be moved where *.in.2 used to be (but that will also move version selection after common options). - Retire addToolVersion.sh (may later replace with a more comprehensive script that tries to download the added tarballs, copy the patches and try to apply them, and create a version.desc). Signed-off-by: Alexey Neyman <stilor@att.net>
2017-07-05 02:19:42 +00:00
config LIBC_NEWLIB_TARGET_CFLAGS
string
prompt "Target CFLAGS for newlib"
default ""
help
Used to add specific options when compiling the target libraries
(eg. -ffunction-sections -fdata-sections), which can't be defined
in global TARGET_CFLAGS, because they shall be not used for the
gcc target libraries.
Note: Both TARGET_CFLAGS and LIBC_NEWLIB_TARGET_CFLAGS are used
to compile the libraries.
Leave blank if you don't know better.
config LIBC_NEWLIB_IO_C99FMT
bool
prompt "Enable IOs on C99 formats"
help
Enable support for IOs on C99 formats.
config LIBC_NEWLIB_IO_LL
bool
prompt "Enable IOs on long long"
help
Enable support for IOs on long long integers.
config LIBC_NEWLIB_IO_FLOAT
bool
prompt "Enable IOs on floats and doubles"
help
Enable support for IOs on floating point
values (float and double).
config LIBC_NEWLIB_IO_LDBL
bool
prompt "Enable IOs on long doubles"
depends on LIBC_NEWLIB_IO_FLOAT
help
Enable support for IOs on long doubles.
config LIBC_NEWLIB_IO_POS_ARGS
bool
prompt "Enable printf-family positional arg support"
help
Enable printf-family positional arg support.
config LIBC_NEWLIB_FVWRITE_IN_STREAMIO
bool
prompt "Vector buffer mechanism to support stream IO buffering"
default y
help
NEWLIB implements the vector buffer mechanism to support stream IO
buffering required by C standard. This feature is possibly
unnecessary for embedded systems which won't change file buffering
with functions like `setbuf' or `setvbuf'. The buffering mechanism
still acts as default for STDIN/STDOUT/STDERR even if this option
is specified.
config LIBC_NEWLIB_UNBUF_STREAM_OPT
bool
prompt "Optimize fprintf to unbuffered unix file"
default y
help
NEWLIB does optimization when `fprintf to write only unbuffered unix
file'. It creates a temorary buffer to do the optimization that
increases stack consumption by about `BUFSIZ' bytes. Disabling this option
disables the optimization and saves size of text and stack.
config LIBC_NEWLIB_FSEEK_OPTIMIZATION
bool
prompt "Fseek optimisation"
default y
help
Disabling fseek optimisation can decrease code size.
config LIBC_NEWLIB_DISABLE_SUPPLIED_SYSCALLS
bool
prompt "Disable the syscalls supplied with newlib"
help
Disable the syscalls that come with newlib. You
will have to implement your own _sbrk, _read,
_write... If you plan to port newlib to a new
platform/board, say Yes.
config LIBC_NEWLIB_REGISTER_FINI
bool
prompt "Enable finalization function registration using atexit"
help
Enable finalization function registration using atexit.
config LIBC_NEWLIB_ATEXIT_DYNAMIC_ALLOC
bool
prompt "Enable dynamic allocation of atexit entries"
default y
help
Enable dynamic allocation of atexit entries.
config LIBC_NEWLIB_GLOBAL_ATEXIT
bool
prompt "Enable atexit data structure as global variable"
help
Enable atexit data structure as global variable. By doing so it is
move out of _reent structure, and can be garbage collected if atexit
is not referenced.
config LIBC_NEWLIB_LITE_EXIT
bool
prompt "Enable lite exit"
help
Enable lite exit, a size-reduced implementation of exit that doesn't
invoke clean-up functions such as _fini or global destructors.
config LIBC_NEWLIB_REENT_SMALL
bool
prompt "Enable small reentrant struct support"
help
Enable small reentrant struct support.
config LIBC_NEWLIB_MULTITHREAD
bool
prompt "Enable support for multiple threads"
default y
help
Enable support for multiple threads.
Add newlib retargetable locking configuration This commit adds support for the newlib configuration option '--enable-newlib-retargetable-locking'. Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
2019-12-20 02:18:46 +00:00
config LIBC_NEWLIB_RETARGETABLE_LOCKING
bool
prompt "Enable retargetable locking"
help
Enable retargetable locking to allow the operating system to override
the dummy lock functions defined within the newlib.
Switch gen-kconfig to new framework Also: - Move companion_* to comp_* to match the kconfig symbols - Replace bootstrap with former gen-versions.sh - Fold *.in.2 into their respective first parts; this moves common options to the end - if it is undesirable, inclusion of *.in can be moved where *.in.2 used to be (but that will also move version selection after common options). - Retire addToolVersion.sh (may later replace with a more comprehensive script that tries to download the added tarballs, copy the patches and try to apply them, and create a version.desc). Signed-off-by: Alexey Neyman <stilor@att.net>
2017-07-05 02:19:42 +00:00
config LIBC_NEWLIB_EXTRA_SECTIONS
bool
prompt "Place each function & data element in their own section"
help
Place each function & data symbol in their own section. This allows
the linker to garbage collect unused symbols at link time.
config LIBC_NEWLIB_WIDE_ORIENT
bool
prompt "Allow wide C99 stream orientation"
default y
help
C99 states that each stream has an orientation, wide or byte. This
feature is possibly unnecessary for embedded systems which only do
byte input/output operations on stream. Disabling this feature can
decrease code size.
config LIBC_NEWLIB_ENABLE_TARGET_OPTSPACE
bool
prompt "Optimize newlib for size"
default y
help
Pass --enable-target-optspace to newlib configure.
This will compile newlib with -Os.
config LIBC_NEWLIB_LTO
bool
prompt "Enable Link Time Optimization"
depends on CC_GCC_USE_LTO
help
Builds the libraries with -flto to enable more aggressive link time
optimization. You will need to add -flto-partition=one to your
application's link line to keep the RETURN assembler macro together
with it's consumers.
config LIBC_NEWLIB_NANO_MALLOC
bool
prompt "Enable Nano Malloc"
help
NEWLIB has two implementations of malloc family's functions, one in
`mallocr.c' and the other one in `nano-mallocr.c'. This options
enables the nano-malloc implementation, which is for small systems
with very limited memory. Note that this implementation does not
support `--enable-malloc-debugging' any more.
config LIBC_NEWLIB_NANO_FORMATTED_IO
bool
prompt "Enable Nano Formatted I/O"
help
This builds NEWLIB with a special implementation of formatted I/O
functions, designed to lower the size of application on small systems
with size constraint issues. This option does not affect wide-char
formatted I/O functions.
config LIBC_NEWLIB_EXTRA_CONFIG_ARRAY
string
prompt "Extra config for newlib"
default ""
help
Extra flags to pass onto ./configure when configuring the newlib.
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