misc/sys/xattr.h: guard against linux uapi header inclusion

If the glibc xattr.h header is included after the uapi header,
compilation fails due to an enum re-using a #define from the
uapi header.  Protect against this by guarding the define and
enum inclusions against each other.

(A corresponding kernel patch has been sent here:
http://lkml.org/lkml/2014/3/7/331 )

(See https://lists.debian.org/debian-glibc/2014/03/msg00029.html
and https://sourceware.org/glibc/wiki/Synchronizing_Headers
for more information.)

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Work around binutils bugs in 2.23 and older

binutils versions up through at least 2.23 have some bugs that cause
STV_HIDDEN symbols to appear in .dynsyms.
Test scalbn and scalbln in all rounding modes, add more tests of negative arguments.

Continuing the move to systematically testing libm functions in all
rounding modes with ALL_RM_TEST, this patch converts the tests of
scalbn and scalbln to use that macro.

Those tests include cases of underflow and overflow, meaning the
expected results depend on the rounding mode.  For convenience in
writing such tests manually, the patch adds the notation plus_oflow,
minus_oflow, plus_uflow and minus_uflow for overflowing / underflowing
results of each sign appropriate to the rounding mode being used, and
gen-libm-test.pl is made to substitute in the appropriate values.  The
tests of underflow and overflow are extended to include negative
arguments to provide better coverage (otherwise minus_oflow and
minus_uflow wouldn't have been used at all).

(A subsequent patch will make ldexp use the scalbn tests, as those
functions are equivalent for binary floating point.)

Tested x86_64 and x86.

	* math/gen-libm-test.pl (parse_args): Handle plus_oflow,
	minus_oflow, plus_uflow and minus_uflow in expected results.
	* math/libm-test.inc (scalbn_test_data): Add more tests of
	negative arguments.  Use plus_oflow, minus_oflow, plus_uflow and
	minus_uflow.
	(scalbn_test): Use ALL_RM_TEST.
	(scalbln_test_data): Add more tests of negative arguments.  Use
	plus_oflow, minus_oflow, plus_uflow and minus_uflow.
	(scalbln_test): Use ALL_RM_TEST.
Add stardard definition on conform processing

This patch adds the -std=c99 option when preprocessing the data files
from the conform testcases. It fixes an issue where the compiler may
split the 'macro bool' defition from stdbool.h-data in two lines and
thus breaking the conform script.
Move bits/mman-linux.h out of sysdeps/unix/sysv/linux/.

This way, non-Linux ports using the Linux values for bits/mman.h
constants need not duplicate the header.
Add comments about non-Linux use of bits/mman-linux.h.
Fix __ASSUME_PREADV and __ASSUME_PWRITEV for Alpha and MicroBlaze (bug 16649).

Reviewing (for all architectures, with a baseline kernel version of
2.6.32) the kernel support for features for which __ASSUME_* macros
would be affected by a move to 2.6.32 as minimum kernel version showed
up that __ASSUME_PREADV and __ASSUME_PWRITEV were wrongly defined for
MicroBlaze (despite the corresponding syscall table entries not being
wired up in the kernel) and Alpha for 2.6.30 and above (although the
support on Alpha was added in 2.6.33).  This patch makes the
kernel-features.h files undefine those macros for appropriate
versions.

	[BZ #16649]
	* sysdeps/unix/sysv/linux/alpha/kernel-features.h
	[__LINUX_KERNEL_VERSION < 0x020621] (__ASSUME_PREADV): Undefine.
	[__LINUX_KERNEL_VERSION < 0x020621] (__ASSUME_PWRITEV): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/kernel-features.h
	(__ASSUME_PREADV): Undefine.
	(__ASSUME_PWRITEV): Likewise.
nscd: also invalidate netgroup cache on reload
Use ALL_RM_TEST for more libm tests.

Continuing the move to using ALL_RM_TEST for tests in libm-test.inc,
this patch converts the tests of fdim, ldexp and scalb.  fdim and
scalb are cases where tests could depend on the rounding mode though
none of the present test inputs do; ldexp is such a case where the
function is equivalent to scalbn (for binary floating point) and the
tests used were a subset of those for scalbn, so this patch makes
ldexp testing use the scalbn tests, as done for other cases of libm
function aliases.

Tested x86_64 and x86.

	* math/libm-test.inc (fdim_test): Use ALL_RM_TEST.
	(ldexp_test_data): Remove.
	(ldexp_test): Move to after scalbn_test.  Use ALL_RM_TEST with
	scalbn_test_data.
	(scalb_test): Use ALL_RM_TEST.
Make libm-test support ALL_RM_TEST with AUTO_TESTS_*.

This patch continues improvements to all-rounding-mode libm testing by
making testing with ALL_RM_TEST support test results from
auto-libm-test-out.  gen-libm-test.pl is adapted to generate
appropriate output with results for each rounding mode, with
AUTO_TESTS_* calls no longer specifying a rounding mode.  Where there
were separate functions in libm-test.inc to test a function in each
rounding mode, using AUTO_TESTS_* to list the tests for each rounding
mode, those are converted to using ALL_RM_TEST (so generally this
patch doesn't change the sets of tests run in each rounding mode,
except that in various cases special-case tests given directly in
libm-test.inc were previously run only for round-to-nearest, and now
are run for all rounding modes).

Tested x86_64 and x86.

	* math/gen-libm-test.pl (generate_testfile): Expect only function
	name as argument to AUTO_TESTS_* and pass results for all rounding
	modes to parse_args.
	(parse_auto_input): Separate inputs of automatic tests from
	outputs before storing in %auto_tests.
	* math/libm-test.inc (acos_test_data): Update call to
	AUTO_TESTS_f_f.
	(acos_test): Use ALL_RM_TEST.
	(acos_tonearest_test_data): Remove.
	(acos_test_tonearest): Likewise.
	(acos_towardzero_test_data): Likewise.
	(acos_test_towardzero): Likewise.
	(acos_downward_test_data): Likewise.
	(acos_test_downward): Likewise.
	(acos_upward_test_data): Likewise.
	(acos_test_upward): Likewise.
	(acosh_test_data): Update call to AUTO_TESTS_f_f.
	(asin_test_data): Likewise.
	(asin_test): Use ALL_RM_TEST.
	(asin_tonearest_test_data): Remove.
	(asin_test_tonearest): Likewise.
	(asin_towardzero_test_data): Likewise.
	(asin_test_towardzero): Likewise.
	(asin_downward_test_data): Likewise.
	(asin_test_downward): Likewise.
	(asin_upward_test_data): Likewise.
	(asin_test_upward): Likewise.
	(asinh_test_data): Update call to AUTO_TESTS_f_f.
	(atan_test_data): Likewise.
	(atanh_test_data): Likewise.
	(atan2_test_data): Update call to AUTO_TESTS_ff_f.
	(cabs_test_data): Update call to AUTO_TESTS_c_f.
	(carg_test_data): Likewise.
	(cbrt_test_data): Update call to AUTO_TESTS_f_f.
	(ccos_test_data): Update call to AUTO_TESTS_c_c.
	(ccosh_test_data): Likewise.
	(cexp_test_data): Likewise.
	(clog_test_data): Likewise.
	(clog10_test_data): Likewise.
	(cos_test_data): Update call to AUTO_TESTS_f_f.
	(cos_test): Use ALL_RM_TEST.
	(cos_tonearest_test_data): Remove.
	(cos_test_tonearest): Likewise.
	(cos_towardzero_test_data): Likewise.
	(cos_test_towardzero): Likewise.
	(cos_downward_test_data): Likewise.
	(cos_test_downward): Likewise.
	(cos_upward_test_data): Likewise.
	(cos_test_upward): Likewise.
	(cosh_test_data): Update call to AUTO_TESTS_f_f.
	(cosh_test): Use ALL_RM_TEST.
	(cosh_tonearest_test_data): Remove.
	(cosh_test_tonearest): Likewise.
	(cosh_towardzero_test_data): Likewise.
	(cosh_test_towardzero): Likewise.
	(cosh_downward_test_data): Likewise.
	(cosh_test_downward): Likewise.
	(cosh_upward_test_data): Likewise.
	(cosh_test_upward): Likewise.
	(cpow_test_data): Update call to AUTO_TESTS_cc_c.
	(csqrt_test_data): Update call to AUTO_TESTS_c_c.
	(ctan_test_data): Likewise.
	(ctan_test): Use ALL_RM_TEST.
	(ctan_tonearest_test_data): Remove.
	(ctan_test_tonearest): Likewise.
	(ctan_towardzero_test_data): Likewise.
	(ctan_test_towardzero): Likewise.
	(ctan_downward_test_data): Likewise.
	(ctan_test_downward): Likewise.
	(ctan_upward_test_data): Likewise.
	(ctan_test_upward): Likewise.
	(ctanh_test_data): Update call to AUTO_TESTS_c_c.
	(ctanh_test): Use ALL_RM_TEST.
	(ctanh_tonearest_test_data): Remove.
	(ctanh_test_tonearest): Likewise.
	(ctanh_towardzero_test_data): Likewise.
	(ctanh_test_towardzero): Likewise.
	(ctanh_downward_test_data): Likewise.
	(ctanh_test_downward): Likewise.
	(ctanh_upward_test_data): Likewise.
	(ctanh_test_upward): Likewise.
	(erf_test_data): Update call to AUTO_TESTS_f_f.
	(erfc_test_data): Likewise.
	(exp_test_data): Likewise.
	(exp_test): Use ALL_RM_TEST.
	(exp_tonearest_test_data): Remove.
	(exp_test_tonearest): Likewise.
	(exp_towardzero_test_data): Likewise.
	(exp_test_towardzero): Likewise.
	(exp_downward_test_data): Likewise.
	(exp_test_downward): Likewise.
	(exp_upward_test_data): Likewise.
	(exp_test_upward): Likewise.
	(exp10_test_data): Update call to AUTO_TESTS_f_f.
	(exp10_test): Use ALL_RM_TEST.
	(exp10_tonearest_test_data): Remove.
	(exp10_test_tonearest): Likewise.
	(exp10_towardzero_test_data): Likewise.
	(exp10_test_towardzero): Likewise.
	(exp10_downward_test_data): Likewise.
	(exp10_test_downward): Likewise.
	(exp10_upward_test_data): Likewise.
	(exp10_test_upward): Likewise.
	(exp2_test_data): Update call to AUTO_TESTS_f_f.
	(expm1_test_data): Likewise.
	(expm1_test): Use ALL_RM_TEST.
	(expm1_tonearest_test_data): Remove.
	(expm1_test_tonearest): Likewise.
	(expm1_towardzero_test_data): Likewise.
	(expm1_test_towardzero): Likewise.
	(expm1_downward_test_data): Likewise.
	(expm1_test_downward): Likewise.
	(expm1_upward_test_data): Likewise.
	(expm1_test_upward): Likewise.
	(fma_test_data): Update call to AUTO_TESTS_fff_f.
	(fma_test): Use ALL_RM_TEST.
	(fma_towardzero_test_data): Remove.
	(fma_test_towardzero): Likewise.
	(fma_downward_test_data): Likewise.
	(fma_test_downward): Likewise.
	(fma_upward_test_data): Likewise.
	(fma_test_upward): Likewise.
	(hypot_test_data): Update call to AUTO_TESTS_ff_f.
	(j0_test_data): Update call to AUTO_TESTS_f_f.
	(j1_test_data): Likewise.
	(jn_test_data): Update call to AUTO_TESTS_if_f.
	(lgamma_test_data): Update call to AUTO_TESTS_f_f1.
	(log_test_data): Update call to AUTO_TESTS_f_f.
	(log10_test_data): Likewise.
	(log1p_test_data): Likewise.
	(log2_test_data): Likewise.
	(pow_test_data): Update call to AUTO_TESTS_ff_f.
	(pow_tonearest_test_data): Likewise.
	(sin_test_data): Update call to AUTO_TESTS_f_f.
	(sin_test): Use ALL_RM_TEST.
	(sin_tonearest_test_data): Remove.
	(sin_test_tonearest): Likewise.
	(sin_towardzero_test_data): Likewise.
	(sin_test_towardzero): Likewise.
	(sin_downward_test_data): Likewise.
	(sin_test_downward): Likewise.
	(sin_upward_test_data): Likewise.
	(sin_test_upward): Likewise.
	(sincos_test_data): Update call to AUTO_TESTS_fFF_11.
	(sinh_test_data): Update call to AUTO_TESTS_f_f.
	(sinh_test): Use ALL_RM_TEST.
	(sinh_tonearest_test_data): Remove.
	(sinh_test_tonearest): Likewise.
	(sinh_towardzero_test_data): Likewise.
	(sinh_test_towardzero): Likewise.
	(sinh_downward_test_data): Likewise.
	(sinh_test_downward): Likewise.
	(sinh_upward_test_data): Likewise.
	(sinh_test_upward): Likewise.
	(sqrt_test_data): Update call to AUTO_TESTS_f_f.
	(sqrt_test): Use ALL_RM_TEST.
	(sqrt_tonearest_test_data): Remove.
	(sqrt_test_tonearest): Likewise.
	(sqrt_towardzero_test_data): Likewise.
	(sqrt_test_towardzero): Likewise.
	(sqrt_downward_test_data): Likewise.
	(sqrt_test_downward): Likewise.
	(sqrt_upward_test_data): Likewise.
	(sqrt_test_upward): Likewise.
	(tan_test_data): Update call to AUTO_TESTS_f_f.
	(tan_test): Use ALL_RM_TEST.
	(tan_tonearest_test_data): Remove.
	(tan_test_tonearest): Likewise.
	(tan_towardzero_test_data): Likewise.
	(tan_test_towardzero): Likewise.
	(tan_downward_test_data): Likewise.
	(tan_test_downward): Likewise.
	(tan_upward_test_data): Likewise.
	(tan_test_upward): Likewise.
	(tanh_test_data): Update call to AUTO_TESTS_f_f.
	(tgamma_test_data): Likewise.
	(y0_test_data): Likewise.
	(y1_test_data): Likewise.
	(yn_test_data): Update call to AUTO_TESTS_if_f.
	(main): Do not call removed functions.
PowerPC: optimized strcspn for PPC64/POWER7

This patch add a optimized strcspn for POWER7 by using a different
algorithm than default implementation: it constructs a table based on
the 'accept' argument and use this table to check for any occurance
on the input string. The idea is similar as x86_64 uses.
For PowerPC some tunings were added, such as unroll loops and align
stack memory to table to 16 bytes (so VSX clean can ran without
alignment issues).
Test most libm functions in all rounding modes.

This patch makes libm-test.inc tests of most functions use ALL_RM_TEST
unless there was some reason to defer that change for a particular
function.

I started out planning to defer the change for pow (bug 16315), cexp /
ccos / ccosh / csin / csinh (likely fallout from exp, bug 16284) and
cpow (exact expectations for signs of exact zero results not wanted).
Testing on x86_64 and x86 showed additional failures for acosh, cacos,
catan, catanh, clog, clog10, jn, log, log10, log1p, log2, tgamma, yn,
so making the change for those functions was deferred as well, pending
investigation to show which of these represent distinct bugs (some
such bugs may already be filed) and appropriate fixing / XFAILing.
Failures include wrong signs of zero results, errors slightly above
the 9ulp bound (in such cases it may make sense for functions to set
round-to-nearest internally to reduce error accumulation), large
errors and incorrect overflow/underflow for the rounding mode (with
consequent missing errno settings in some cases).  It's possible some
could be issues with test expectations, though I didn't notice any
that were obviously like that (I added NO_TEST_INLINE for cases that
were failing for ildoubl on x86 and where it seemed reasonable for
them to fail for the fast-math inlines).

There may of course be failures on other architectures for functions
that didn't fail on x86_64 or x86, in which case the usual rule
applies: file a bug (preferably identifying the underlying problem
function, in cases where function A calls function B and a problem
with function B may present in the test results for function A) if not
already in Bugzilla then fix or XFAIL.

Tested x86_64 and x86 and ulps updated accordingly.

	* math/libm-test.inc (asinh_test): Use ALL_RM_TEST.
	(atan_test): Likewise.
	(atanh_test_data): Use NO_TEST_INLINE for two tests.
	(atanh_test): Use ALL_RM_TEST.
	(atan2_test_data): Likewise.
	(cabs_test): Likewise.
	(cacosh_test): Likewise.
	(carg_test): Likewise.
	(casin_test): Likewise.
	(casinh_test): Likewise.
	(cbrt_test): Likewise.
	(csqrt_test): Likewise.
	(erf_test): Likewise.
	(erfc_test): Likewise.
	(pow10_test): Likewise.
	(exp2_test): Likewise.
	(hypot_test): Likewise.
	(j0_test): Likewise.
	(j1_test): Likewise.
	(lgamma_test): Likewise.
	(gamma_test): Likewise.
	(sincos_test): Likewise.
	(tanh_test): Likewise.
	(y0_test): Likewise.
	(y1_test): Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
PowerPC: optimized strpbrk for POWER7

This patch add an optimized strpbrk for POWER7 by using a different
algorithm than default implementation: it constructs a table based on
the 'accept' argument and use this table to check for any occurance on
the input string. The idea is similar as x86_64 uses.
For PowerPC some tunings were added, such as unroll loops and memory
clear using VSX instructions.
Fix -Wundef warnins for __FP_FAST_FMA*

The macros are defined by the compiler, so we can only verify whether
they are defined or not.
Implement benchmarking script in python

Implemented the benchmark script in python since it is much cleaner
and simpler to maintain.
ChangeLog formatting fix
Fix log (1) in round-downward mode (bug 16731).

According to ISO C Annex F, log (1) should be +0 in all rounding
modes, but some implementations in glibc wrongly return -0 in
round-downward mode (mapping to log1p (x - 1) is problematic because 1
- 1 is -0 in round-downward mode, and log1p (-0) is -0).  This patch
fixes this.  (It helps with some implementations of other functions
such as acosh, log2 and log10 that call out to log, but not enough to
enable all-rounding-modes testing for those functions without further
fixes to other implementations of them.)

Tested x86_64 and x86 and ulps updated accordingly, and did spot tests
for mips64 for the ldbl-128 fix, and i586 for the sysdeps/i386/fpu
implementations shadowed by those in sysdeps/i386/i686/fpu.

	[BZ #16731]
	* sysdeps/i386/fpu/e_log.S (__ieee754_log): Take absolute value
	when x - 1 is zero.
	* sysdeps/i386/fpu/e_logf.S (__ieee754_logf): Likewise.
	* sysdeps/i386/fpu/e_logl.S (__ieee754_logl): Likewise.
	* sysdeps/i386/i686/fpu/e_logl.S (__ieee754_logl): Likewise.
	* sysdeps/ieee754/dbl-64/e_log.c (__ieee754_log): Return +0 when
	argument is 1.
	* sysdeps/ieee754/ldbl-128/e_logl.c (__ieee754_logl): Likewise.
	* sysdeps/x86_64/fpu/e_logl.S: Take absolute value when x - 1 is
	zero.
	* math/libm-test.inc (log_test): Use ALL_RM_TEST.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Fix -Wundef warnings for _ABI* on MIPS.

This patch fixes -Wundef warnings related to the _ABI* macros on MIPS.
GCC predefines only the _ABI* macro related to the ABI actually in
use, meaning that a conditional such as "#if _MIPS_SIM == _ABI64" is
true only for the ABI in question (all the macros are nonzero), but
produces a -Wundef warning for the other ABIs.  The normal approach to
using these macros is to include <sgidefs.h>, which ensures that all
three _ABI* macros are defined rather than just one; this patch does
so in the places that caused warnings (the bulk of the warnings
arising from <bits/wordsize.h>).  Tested that the warnings are fixed.

	* sysdeps/mips/bits/wordsize.h: Include <sgidefs.h>.
	* sysdeps/unix/sysv/linux/mips/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/setrlimit64.c: Likewise.
Fix dbl-64 exp overflow/underflow in non-default rounding modes (bug 16284).

The dbl-64 version of exp needs round-to-nearest mode for its internal
computations, but that has the consequence of inappropriate
overflowing and underflowing results in other rounding modes.  This
patch fixes this by recomputing the relevant results in cases where
the round-to-nearest result overflows to infinity or underflows to
zero (most of the diffs are actually just consequent reindentation).
Tests are enabled in all rounding modes for complex functions using
exp - but not for cexp because it turns out there are bugs causing
spurious underflows for cexp for some tests, which will need to be
fixed separately (I suspect ccos ccosh csin csinh ctan ctanh have
similar bugs, just not shown by the present set of test inputs).

Tested x86_64 and x86 and ulps updated accordingly.

	[BZ #16284]
	* sysdeps/ieee754/dbl-64/e_exp.c (__ieee754_exp): Use original
	rounding mode to recompute results that overflow to infinity or
	underflow to zero.
	* math/auto-libm-test-in: Don't mark tests as expected to fail for
	bug 16284.
	* math/auto-libm-test-out: Regenerated.
	* math/libm-test.inc (ccos_test): Use ALL_RM_TEST.
	(ccosh_test): Likewise.
	(csin_test_data): Use plus_oflow.
	(csin_test): Use ALL_RM_TEST.
	(csinh_test_data): Use plus_oflow.
	(csinh_test): Use ALL_RM_TEST.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Account for alloca use when collecting interface addresses (bug 16002)

To reproduce:

	# ip li add name dummy0 type dummy
	# site_id=$(head -c6 /dev/urandom | od -tx2 -An | tr ' ' ':')
	# for ((i = 0; i < 65536; i++)) do
	> ip ad ad $(printf fd80$site_id::%04x $i)/128 dev dummy0
	> done
	# (ulimit -s 900; getent ahosts localhost)
	# ip li de dummy0