buildsys: cache build flags in vars

Running `make clean` atm takes like 20 seconds because every subdir
re-evaluates all the toolchain flags.  Add some helpers to automate
the process of setting up variables to cache the result of tests,
as well as the checking of an already set flag.

Now `make clean` takes like 2 seconds on my system.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

libubacktrace: use -asynchronous-funwind-tables rather than -funwind-tables

From gcc documentation, we can read:
" ...
-fasynchronous-unwind-tables
    Generate unwind table in dwarf2 format, if supported by target
    machine. The table is exact at each instruction boundary, so it can be
    used for stack unwinding from asynchronous events (such as debugger or
    garbage collector)
..."

So it seems better rather than using -funwind-tables (glibc seems to prefer
-fasynchronous-unwind-tables).

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>

libc: allow to backtrace out of abort call

Build raise and abort function with dwarf2 info by using
-fasynchronous-unwind-tables to make backtrace() working across a
call to abort.

A scenario where it could be useful is within a signal handler that
wants to dump a backtrace when catching some signal (i.e SIGABRT).
Without having abort & raise built with DWARF2 information, it is not
possible for the libgcc stack unwinder to walk through the call stack
out of the abort/raise function.

Impacts in terms of size are really limited

Current
   text    data     bss     dec     hex filename
    164       0       0     164      a4 ./libpthread/nptl/sysdeps/unix/sysv/linux/raise.os
    164       0       0     164      a4 ./libpthread/nptl/sysdeps/unix/sysv/linux/raise.oS
    220      24       4     248      f8 ./libc/stdlib/abort.os

With (-fasynchronous-unwind-tables)

   text    data     bss     dec     hex filename
    216       0       0     216      d8 ./libpthread/nptl/sysdeps/unix/sysv/linux/raise.os
    216       0       0     216      d8 ./libpthread/nptl/sysdeps/unix/sysv/linux/raise.oS
    280      24       4     308     134 ./libc/stdlib/abort.os

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Acked-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

config: remove some redundant words in the menus

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

ldso: setup search path even when there are no "/"

If people use an interp path such as "ld.so", then there is no "/" found,
and we end up dereferencing a NULL pointer.  Simplify the logic by having
a relative interp path like that be the same as "" (which the code later
on interprets as $PWD).

While we're here, document some of the nuances of this code.

Reported-by: Ignacy Gawędzki <uclibc@qult.net>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

ldso: simplify interp path search logic

The setup logic is duplicated, so unify it in a local func.

Mark the variable const while we're doing this, and add missing
ifdef protection to the header that declares it availability.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

getpass: s/sizeof(buf)-1/sizeof(buf)/ in fgets

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

bump version to 0.9.33-rc1-git

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

release 0.9.33-rc1

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

getpass: several fixes

fixes bogus fgets error check
fixes bogus strlen() < 0 check
switches off buffering regardless of tcgetattr() success
prints newline even on error or if there was no '\n' on input
uses sizeof(buf) instead of PWD_BUFFER_SIZE

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

libubacktrace: use -funwind-tables rather than -fexecptions

For backtrace to work is enough to use -funwind-tables instead
of -fexceptions.

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

libcrypt: add support for SHA256-CRYPT password hashing

This is based on Ulrich Drepper's implementation in GLIBC, but hacked up to work
in uClibc.  The differences from the GLIBC version are as follows:

- b64_from_24bit() has been converted into a macro
- Usage of GLIBC-isms (such as libc_freeres_ptr) have been removed

It is enabled by the UCLIBC_HAS_SHA256_CRYPT_IMPL configuration symbol.  You must
have UCLIBC_HAS_CRYPT_IMPL enabled as well.

Signed-off-by: William Pitcock <nenolod@dereferenced.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libcrypt: add support for SHA512-CRYPT password hashing

This is based on Ulrich Drepper's implementation in GLIBC, but hacked up to work
in uClibc.  The differences from the GLIBC version are as follows:

- b64_from_24bit() has been converted into a macro
- Usage of GLIBC-isms (such as libc_freeres_ptr) have been removed

It is enabled by the UCLIBC_HAS_SHA512_CRYPT_IMPL configuration symbol.  You must
have UCLIBC_HAS_CRYPT_IMPL enabled as well.

Signed-off-by: William Pitcock <nenolod@dereferenced.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libcrypt: make crypt() itself more modular

By using a function table, we can more cleanly support new crypt
implementations, such as SHA256 ($5$) and SHA512 ($6$).

Signed-off-by: William Pitcock <nenolod@dereferenced.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libdl: rudimentary locking for dlopen/dlsym/dlclose

This implements big-dlfcn lock to allow multithreaded usage of
dlopen/dlsym/dlclose. We should really clean up the dl code so
we can use more fine grained locking or even RCU where appropriate.
But at least we won't crash now.

Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

sys/queue.h: update to eglibc version

Xen needs SIMPLEQ_* queue types which was not provided from the old
uclibc queue.h.

Use same implementation as eglibc.
Grabbed from: http://www.eglibc.org/svn/trunk/libc/misc/sys/queue.h

Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

x86_64: add PLT bypass for __sigsetjmp

The current x86_64 setjmp helpers incur a reloc, so fix that up.

$ readelf -r lib/libc.so.0
...
Relocation section '.rela.plt' at offset 0xb058 contains 10 entries:
  Offset          Info           Type           Sym. Value    Sym. Name + Addend
000000236010  02a400000007 R_X86_64_JUMP_SLO 000000000000b3c4 __sigsetjmp + 0
...

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

getutid: add a hidden def

The pututline func calls getutid, so add a hidden def for
it to avoid plt relocs:

$ readelf -r lib/libc.so.0
...
Relocation section '.rela.plt' at offset 0xb058 contains 11 entries:
  Offset          Info           Type           Sym. Value    Sym. Name + Addend
000000236000  01cf00000007 R_X86_64_JUMP_SLO 00000000000190ab getutid + 0
...

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

ldso: bfin: fix sram_flags init

An earlier version had this, but was lost as code was shuffled around.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

ldso: bfin: shrink sram mapping func

The L1 data and L2 code paths duplicate a lot, so unify them.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

ldso: fdpic: clean up style

There should (hopefully) be no functional changes here.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

ldso: fdpic: unify duplicate bfin/frv logic

Much of the logic in the bfin/frv subdirs is FDPIC specific and not arch
specific.  So start a new fdpic/ subdir to keep common things.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

make ARRAY_SIZE commonly available internally

Some places have opencoded the ARRAY_SIZE macro, so move it to a global
internal location so other places can leverage it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

ldso: use __func__ rather than __FUNCTION__

The former is part of a standard (C99) while the latter is not.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

buildsys: drop manual TARGET_SUBARCH .config lookup

We source the .config file, so there should be no need to manually extract
it.  If the sourcing doesn't work, then a lot of things break in this file.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

include/: ignore new sys/eventfd.h symlink

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

buildsys: s/CROSS/CROSS_COMPILE/g

Use CROSS_COMPILE instead of CROSS as other projects are doing
(i.e. kernel, busybox, buildroot).
CROSS is still supported for backward compatibility only

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

nptl: add missing pt-tempname.c

fix bd3c1a2495cbcb51b606f8e4892fcd127f91e645 forgotten file.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc: do not rely upon ulimit kernel syscall.

On several architectures __NR_ulimit syscall number is currently
defined but it is remapped onto sys_ni_syscall, while on other
architectures they are not longer defined.
So use {get,set}rlimit only to implement ulimit interface.

It fixes LTP ulimit01 test case.

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Acked-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libdl: fix size parameter when unmap library in dlclose

Fix size parameter when unmap a library by means of dlclose, by
taking into account the p_vaddr of first PT_LOAD segment, so it works
also for prelinked shared objects.
Unmapping of dlopen shared libraries is broken since
94cc6edb78a12655c0602a246fa1cbdc8c6d0ad9

Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

stdio: add support for "e" flag with fopen()

Support this useful glibc extension for optionally setting O_CLOEXEC
on fopen streams.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

libcrypt: do not cast away const of key/salt

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

libubacktrace: use .so.$(ABI_VERSION)

Thanks to William Pitcock for noticing

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

nptl: sem_open: use open64 if LFS

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

misc: hide __gen_tempname

fix signed vs. unsigned comparison warnings while at it

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

stdio: hide _stdio_validate_FILE

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

regex_old: make some internal helpers static

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

inet: hide relocations

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

unistd: hide relocations

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

resolv: hide relocations

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

Add a C6X-specific ipc.h.

Signed-off-by: Bernd Schmidt <bernds@codesourcery.com>

buildsys: do not install ld.so linker script

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

libubacktrace: Conditionally link libgcc_eh

When libubacktrace is not enabled there is no need to link in libgcc_eh
Fixes bootstrap failures with (gcc-4.5.x) stage1 compilers that --disable-shared

Signed-off-by: Jason Woodward <jason.woodward@timesys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libm: pass CFLAGS to e500 fenv

As noted by Jason Woodward

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

honor UCLIBC_HAS_FENV for e500

Signed-off-by: Jason Woodward <jason.woodward@timesys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

Fix e500 fpu libm build

Define libm_ARCH_fpu_OUT in libm/powerpc/e500/Makefile.arch as it is used
in libm/powerpc/e500/fpu/Makefile.arch

 libm_ARCH_OBJ:=$(patsubst $(libm_ARCH_fpu_DIR)/%.c,$(libm_ARCH_fpu_OUT)/%.o,$(libm_ARCH_SRC))

This appears to have been broken since cd3a494e99fa4bcad1c2a621b71361005528bead

Signed-off-by: Jason Woodward <jason.woodward@timesys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc: flesh out linux scheduler functions

Most stuff was taken from the eglibc.

Signed-off-by: Henning Heinold <heinold@inf.fu-berlin.de>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

ldso: support RTLD_NOLOAD

So application query if specified module is loaded or not with
dlopen.

Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

stdlib: add qsort_r

GNU extension like qsort but takes a 3 parameter comparision function.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

powerpc: Fix typo in clone()

Thanks to strauman at slac stanford edu for noticing

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

Add stub for eventfd.

Warn if the enventfd() function is not implemented.

Signed-off-by: Jean-Christian de Rivaz <jc@eclis.ch>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libm: implement a generic sincos().

We already provide sincos() on some archs, so we should ship a generic version.

Signed-off-by: William Pitcock <nenolod@dereferenced.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libm: add cabsf() and cabsl() functions.

Signed-off-by: William Pitcock <nenolod@dereferenced.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libm: implement generic cexp(), cexpf() and cexpl().

The cexp*() family of functions is defined by the C99 math standard as
implementing exponential functions for complex types.

Signed-off-by: William Pitcock <nenolod@dereferenced.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

config: document eventfd

in LINUX_SPECIFIC

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

setegid: use setresgid conditionally

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

stubs: remove leftover undefs

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

buildsys: eventually remove sys/eventfd.h

rm sys/eventfd.h unless linux_specific was chosen

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

stubs: handle linux module functions

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

stubs: handle linux-specific

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

stubs: fix inverted socket logic

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

stubs: undef linux specific unless they were asked for

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

Add eventfd support.

Hello,

I whould like to share this simple patch that add the eventfd call to
uClibc. Please review so it can be accepted to be merged.

Jean-Christian

Signed-off-by: Jean-Christian de Rivaz <jc@eclis.ch>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

sparc: fix build for linuxthreads.old

sparc target has assembly implementations of clone.S that doesn't
get used, and thus the build breaks.  Also, sparc is missing a header file in
pthreads.old that exists in pthreads.new.

Signed-off-by: Rob Landley <rob@landley.net>
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

resolver: add a dependencies for DNS resolver feature

DNS resolver needs at least IPV4 or IPV6 support enabled
to be correctly built. Add such dependency.

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

pthreads: fix build when DNS resolver is not enabled.

Resolver state is only available if DNS resolver is enabled.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

sh: fix build for SH in !NPTL case

Signed-off-by: Rob Landley <rob@landley.net>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

linuxthreads: fix typo in __UCLIBC_HAS_IPv4__ macro

IPv4 should has 'V' capital letter.

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

ldso: let people disable to lookup into LD_LIBRARY_PATH

On hardened system it could be useful to disable the use
of LD_LIBRARY_PATH.

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

ldso: minor fixes to implicit search path

Do not defined _dl_ldsopatch if implicit search path if not enabled,
and avoid to call search_for_named_library (even if it is able to handle
NULL search path).

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

ldso: disable the implicit path search in stand-alone mode as well

Honour LDSO_SEARCH_INTERP_PATH knob option also when running in
stand-alone mode.

Signed-off-by: Rune <u-uclibc-y2lt@aetey.se>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

config: add support for <custom>_defconfig

Add support for platform specific and/or custom defconfig
per arch. They have to be suffixed by '_defconfig' and are
automatically detected and displayed by issuing 'make ARCH=<arch> help'.

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

config: revise defconfigs strategy

Revise the way defconfigs are defined, by renaming them
from defconfigs/<arch> to defconfigs/<arch>/defconfig.
It allows to have multiple defconfigs per arch.

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

config: tidy-up of config targets

Introduce two local variables for 'conf' and 'mconf' binaries.
Use $^ automatic variable to invoke [m]conf tool.

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

resolv: fix memory leak

Timothy Holdener writes:
small memory leak in __dns_lookup() when the A record
in the DNS answer is preceded by one or more CNAME records.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

resolv: commentary typo fix

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

gethostbyname_r: set correct h_errno upon failure

previously gethostbyname_r(ipv6.google.com);herror("ERROR:") gave
Answer name = |ipv6.google.com|
Answer type = |5|
herrno=1
h_errno=0
ERROR:: Error 0

herrno=1
h_errno=1
ERROR:: Unknown host

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

resolv: fix compilation

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libdl: remove _dl_ldsopath from libdl.a

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

ldd: take LD_LIBRARY_PATH into account

Extend the environment variables adding the LD_LIBRARY_PATH
if actually passed when doing shared library tracings through
the ld.so trace capability.
This is possible only using the system dynamic linker in stand-alone
mode to avoid any vulnerability.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

Config.in: fix erroneously deleted line

blame e9d74358093b61e2e597fa9e066ba0468df14cba

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

ldso: silence harmless warning for !LDSO_PRELINK_SUPPORT

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc: fix daylight saving time handling

The algorithm computing daylight saving time incorrectly adds a day for
each month after January for leap years. The clock shift from/to DST can
be delayed if the last Sunday of a transition month is exactly seven
days before the first of the following month.

This change adds a day for the February month only.

Signed-off-by: Guillaume Bourcier <guillaumebourcier@free.fr>
Signed-off-by: Richard Braun <rbraun@sceen.net>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

ldso: unify pread syscall definition

A few arches want pread() defined, so move it to common code.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

ldso: bfin/frv: drop dead simulator code

Nowhere do we define DYNAMIC_LOADER_IN_SIMULATOR, so drop the little bit
of code that depends on it.  At least in the Blackfin case, we can run an
FDPIC ldso just fine under the simulator without hacks.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

ldso: merge duplicate dl-syscalls.h code to common header

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

microblaze mmu/elf/shared lib support

microblaze can either be with mmu or without
If with, use elf rather than flat, and support shared libs

Signed-off-by: Ryan Flux <ryan.flux@emsolutions.com.au>
Signed-off-by: Steve Bennett <steveb@workware.net.au>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

microblaze linux has no SDA support

The linker does not set up the Small Data Area symbols,
_SDA_BASE_ and _SDA2_BASE_ so don't try to resolve them

Signed-off-by: Ryan Flux <ryan.flux@emsolutions.com.au>
Signed-off-by: Steve Bennett <steveb@workware.net.au>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

microblaze can be either big or little endian

Signed-off-by: Steve Bennett <steveb@workware.net.au>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

microblaze has long double support too

Signed-off-by: Ryan Flux <ryan.flux@emsolutions.com.au>
Signed-off-by: Steve Bennett <steveb@workware.net.au>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

Use the generic bits/select.h for microblaze

This avoids warnings about type-punned pointers

Signed-off-by: Steve Bennett <steveb@workware.net.au>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

tests: ignore new inet test

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

tests: add fallback for mktemp()

If SuSv3 legacy support is disabled, then mktemp() isn't available, and
we end up getting a lot of build errors.  So add a fallback built on top
of tempnam() since that currently cannot be disabled.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

ldso: x86_64: delete unused variable

gcc informed me:
In file included from ldso/ldso/ldso.c:46:0:
ldso/ldso/x86_64/elfinterp.c: In function '_dl_do_lazy_reloc':
ldso/ldso/x86_64/elfinterp.c:294:6: warning:
variable 'symtab_index' set but not used [-Wunused-but-set-variable]

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

ldso: constify reloc array itself

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Defeat compiler optimization which assumes function addresses are never NULL

From email:
A warning for people who can be hit by the same or similar issue:
gcc 4.1.2 with -march=i486 here with -Os and even with -O2 or -O
is "optimizing away" the check
       if (_stdio_term)
in libc/stdlib/_atexit.c
which results in a "call 0" and a segfault at exit
if you do not happen to link in stdio.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

config: tweak help text

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

resolv: simple optimizations and style/readability fixes

    text           data     bss     dec     hex filename
-   2915              0       0    2915     b63 libc/inet/ns_name_old.o
+   2656              0       0    2656     a60 libc/inet/ns_name.o
-    958              0       0     958     3be libc/inet/ns_parse_old.o
+    898              0       0     898     382 libc/inet/ns_parse.o

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ldso: fix build with PRELINK enabled and !TLS

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

ldso: add missing include

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>