Description in uClibc for this optoin is:
--->---
bool "Use faster (but larger) generic string functions"
default y
help
Answer Y to use the (tweaked) glibc generic string functions.
In general, they are faster (but 3-5K larger) than the base
uClibc string functions which are optimized solely for size.
Many people will answer Y.
--->---
Additional 3-5K of size is not that important if resulting libuClibc.so is
of size about 300k.
But benefits in terms of performance could be pretty significant.
For example on ARC in LMbench we see more than 3 times bump in some tests
--->---
libc bcopy unaligned
...
8.39 - 6.76 (UCLIBC_HAS_STRING_GENERIC_OPT=no)
8.39 - 23.86 (UCLIBC_HAS_STRING_GENERIC_OPT=yes)
--->---
Also since the option in question is default in uClibc I don't expect if
enabled back (it was silently disabled in http://git.buildroot.net/buildroot/commit/?id=cfbf8abc33d86a0cf5c1bb3e0817a22009b7f301 on introduction of NPTL in uClibc
by Khem Raj) it to introduce problems.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Anton Kolesov <anton.kolesov@synopsys.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Cc: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Now with change of BR2_PREFER_STATIC_LIB meaning to "do not build dynamic libs
and build statically linked applications" it's possible to disable support of
shared libs in uClibc as well as builting of shared libc libs.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Cc: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
uClibc can be built stripped (implemented as link-time option in uClibc).
This could be useful for those who build root fs manually.
In Buildroot there is a global strip stage wich strips most of shared libs
in "target" folder (wexcept kernel modules known to not work properly being
stripped and libpthread required to be non-stripped for correct debugging with
gdb of multi-threaded apps).
So there're few problems with current implementation:
1. uClibc is being stripped 2 times (first on its build stage, second on
global Buildroot strip stage)
2. uClibc libs in "staging" folder are also always stripped except if
"no strip" (BR2_STRIP_none) is explicitly is selected in Buildroot config.
That makes it possible to remote debug uClibc libs on target only if target
rootfs was not stripped (which might not be possible due to huge libs
like Qt)
This patch disables embedded strip in uClibc (still users may modify uClibc
config and explicitly set "DOSTRIP=yes" if really needed).
Interesting that DOSTRIP was not only selected in uClibc config but also was
force set with Buildroot on uClibc configuration step with UCLIBC_STRIP_CONFIG.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Waldemar Brodkorb <wbx@openadk.org>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
With uClibc commit e8065705, valloc is now optional in SUSv2 and removed
from SUSv3 and later. However, cdrkit currently requires valloc, so
enable it in the uClibc snapshot configuration file.
Fixes
http://autobuild.buildroot.net/results/5a5/5a51f3f06e04eed39d59477ea1178aef7d397754/
Signed-off-by: Chris Zankel <chris@zankel.net>
[baruch: fix summary line, add autobuild reference]
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Prior to uClibc commit f143f920694c, uClibc used to always include the
gnu obstack extension, which is used and required by many tools, such as
binutils.
Because of the change mentioned above, obstack is now optional, and got
disabled per default, so enable it in the uClibc snapshot configuration file.
Signed-off-by: Chris Zankel <chris@zankel.net>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
[Peter: update manual to match]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
