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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"
newlib: fix conflicting configure options Configuring the newlib with "--enable-newlib-nano-formatted-io" and "--enable-newlib-io-pos-args" would cause built GCC cannot compile some IO functions like "std::cout". And I added additional notes at Nano Formatted I/O config. Signed-off-by: Chen Tao <t.clydechen@gmail.com>
2022-06-27 08:13:18 +00:00
depends on !LIBC_NEWLIB_NANO_FORMATTED_IO
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
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"
newlib: add 4.3.0.20230120 Add the 4.3.0.20230120 and update the required patches. As of this release the newlib-global-atexit is mandatory so set this to default y. Included is an upstream patch to support older GCC versions. Signed-off-by: Chris Packham <judge.packham@gmail.com>
2023-05-28 03:29:03 +00:00
default y
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
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.
newlib: fix conflicting configure options Configuring the newlib with "--enable-newlib-nano-formatted-io" and "--enable-newlib-io-pos-args" would cause built GCC cannot compile some IO functions like "std::cout". And I added additional notes at Nano Formatted I/O config. Signed-off-by: Chen Tao <t.clydechen@gmail.com>
2022-06-27 08:13:18 +00:00
Some notes about this feature:
1) Floating-point support is split out of the formatted I/O code into
weak functions which are not linked by default. Programs that need
floating-point I/O support must explicitly request linking of one or
both of the floating-point functions: _printf_float or _scanf_float.
This can be done at link time using the -u option which can be passed
to either gcc or ld.
2) The following configuration options are ignored for non-wide-char
formatted I/O functions, and can be thought of as disabled.
"Enable printf-family positional arg support"
"Enable IOs on C99 formats"
"Enable IOs on long long"
"Enable IOs on long doubles"
Additionally, "Enable IOs on floats and doubles" is supported in this
specific implementation, one can disable it to further reduce code size.
In this case, the floating-point specifiers will not be recognized or
handled, and the -u option will not work either.
Learn more: https://sourceware.org/newlib/README
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_CONFIG_ARRAY
string
prompt "Extra config for newlib"
default ""
help
Extra flags to pass onto ./configure when configuring the newlib.
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