Commit 6bc301672bfbd ("math: Remove __XXX math functions from installed
math.h [BZ #32418]") left an extra semicolon after macro expansion. For
instance the ceil declaration after expansion is:

  extern double ceil (double __x) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__const__));;

This chokes very naive parsers like gauche c-wrapper. Fix that by
removing that extra semicolon in the macro.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
(cherry picked from commit 443cb0b5f25129dd0f1e9f9101299d31c4700b7f)

The logic was copied wrong from CORE-MATH.

(cherry picked from commit 09e7f4d594b4308fbea18e3044148d67b59757c9)

The logic was copied wrong from CORE-MATH.

It was copied wrong from CORE-MATH.

(cherry picked from commit c79277a16785c8ae96d821414f4d31d654a0177c)

Vector variant of the new C23 tanpi. New tests pass on AArch64.

Vector variant of the new C23 cospi. New tests pass on AArch64.

Vector variant of the new C23 sinpi. New tests pass on AArch64.

More routines are to follow, some of which hit many failures in the
current testsuite due to wrong sign of zero (mathvec routines are not
required to get this right). Instead of disabling a large number of
tests, change the failure condition such that, for vector routines,
tests pass as long as computed == expected == 0.0, regardless of sign.

Affected tests (vector tests for expm1, log1p, sin, tan and tanh) all
still pass.

Clang's <tgmath.h> doesn't support all C23 functions in glibc's <tgmath.h>:

https://github.com/llvm/llvm-project/issues/121536

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>

These inputs were generated with the programs from
https://gitlab.inria.fr/zimmerma/math_accuracy,
with rounding to nearest:

* for univariate binary32 functions by exhaustive search
* for other functions with the "threshold" parameter up to 10^6