This adds 3 configuration options for the lib_strftime, which can be
used to save flash memory when all the formatters are not needed by an
embedded application.
There is always a minimal set of formatters supported:
"%a, %b/%h, %d, %H, %m, %M, %S, %Y, %%". To add on top of that one can
specify:
- LIBC_STRFTIME_C_STANDARD_FORMATS : All ISO-C conversion specifiers
- LIBC_STRFTIME_POSIX_FORMATS : Additional posix formats
- LIBC_STRFTIME_NONSTANDARD_FORMATS : Additional GNU nonstandard formats
All of these are enabled by default unless building for CONFIG_DEFAULT_SMALL.
Disabling these options can save over 3KB of flash on an 32-bit
ARM system, when all the format specifiers are not needed.
Signed-off-by: Jukka Laitinen <jukka.laitinen@tii.ae>
Gregory Nutt <gnutt@nuttx.org>
Run all .c and .h files modified in this PR through nxstyle and correct all coding standard problems.
Xiang Xiao <xiaoxiang@xiaomi.com>
Remove TIME_EXTENDED option to more conform C standard
Note: the code/data size increment is small
Squashed commit of the following:
libs/libxx: Fix some confusing in naming. If the directory is called libxx, then the library must be libxx.a (unless perhaps LIBCXX is selected).
libs/: Fix paths in moved library directories.
libs: Brute force move of libc, libnx, and libxx to libs. Cannot yet build it in that configuration.
