1 /* A GNU-like <math.h>.
3 Copyright (C) 2002-2003, 2007-2012 Free Software Foundation, Inc.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18 #ifndef _@GUARD_PREFIX@_MATH_H
21 @PRAGMA_SYSTEM_HEADER@
25 /* The include_next requires a split double-inclusion guard. */
26 #@INCLUDE_NEXT_AS_FIRST_DIRECTIVE@ @NEXT_AS_FIRST_DIRECTIVE_MATH_H@
28 #ifndef _@GUARD_PREFIX@_MATH_H
29 #define _@GUARD_PREFIX@_MATH_H
32 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
34 /* The definition of _GL_ARG_NONNULL is copied here. */
36 /* The definition of _GL_WARN_ON_USE is copied here. */
39 /* Helper macros to define type-generic function FUNC as overloaded functions,
40 rather than as macros like in C. POSIX declares these with an argument of
41 real-floating (that is, one of float, double, or long double). */
42 # define _GL_MATH_CXX_REAL_FLOATING_DECL_1(func) \
44 _gl_cxx_ ## func ## f (float f) \
49 _gl_cxx_ ## func ## d (double d) \
54 _gl_cxx_ ## func ## l (long double l) \
58 # define _GL_MATH_CXX_REAL_FLOATING_DECL_2(func) \
62 return _gl_cxx_ ## func ## f (f); \
67 return _gl_cxx_ ## func ## d (d); \
70 func (long double l) \
72 return _gl_cxx_ ## func ## l (l); \
76 /* Helper macros to define a portability warning for the
77 classification macro FUNC called with VALUE. POSIX declares the
78 classification macros with an argument of real-floating (that is,
79 one of float, double, or long double). */
80 #define _GL_WARN_REAL_FLOATING_DECL(func) \
82 rpl_ ## func ## f (float f) \
87 rpl_ ## func ## d (double d) \
92 rpl_ ## func ## l (long double l) \
96 _GL_WARN_ON_USE (rpl_ ## func ## f, #func " is unportable - " \
97 "use gnulib module " #func " for portability"); \
98 _GL_WARN_ON_USE (rpl_ ## func ## d, #func " is unportable - " \
99 "use gnulib module " #func " for portability"); \
100 _GL_WARN_ON_USE (rpl_ ## func ## l, #func " is unportable - " \
101 "use gnulib module " #func " for portability")
102 #define _GL_WARN_REAL_FLOATING_IMPL(func, value) \
103 (sizeof (value) == sizeof (float) ? rpl_ ## func ## f (value) \
104 : sizeof (value) == sizeof (double) ? rpl_ ## func ## d (value) \
105 : rpl_ ## func ## l (value))
109 /* Pull in a function that fixes the 'int' to 'long double' conversion
111 _GL_EXTERN_C void _Qp_itoq (long double *, int);
112 static void (*_gl_math_fix_itold) (long double *, int) = _Qp_itoq;
116 /* POSIX allows platforms that don't support NAN. But all major
117 machines in the past 15 years have supported something close to
118 IEEE NaN, so we define this unconditionally. We also must define
119 it on platforms like Solaris 10, where NAN is present but defined
120 as a function pointer rather than a floating point constant. */
121 #if !defined NAN || @REPLACE_NAN@
122 # if !GNULIB_defined_NAN
124 /* The Compaq (ex-DEC) C 6.4 compiler and the Microsoft MSVC 9 compiler
125 choke on the expression 0.0 / 0.0. */
126 # if defined __DECC || defined _MSC_VER
130 static float zero = 0.0f;
133 # define NAN (_NaN())
135 # define NAN (0.0f / 0.0f)
137 # define GNULIB_defined_NAN 1
141 /* Solaris 10 defines HUGE_VAL, but as a function pointer rather
142 than a floating point constant. */
143 #if @REPLACE_HUGE_VAL@
145 # define HUGE_VAL (1.0 / 0.0)
152 _GL_FUNCDECL_SYS (acosf, float, (float x));
154 _GL_CXXALIAS_SYS (acosf, float, (float x));
155 _GL_CXXALIASWARN (acosf);
156 #elif defined GNULIB_POSIXCHECK
158 # if HAVE_RAW_DECL_ACOSF
159 _GL_WARN_ON_USE (acosf, "acosf is unportable - "
160 "use gnulib module acosf for portability");
165 # if !@HAVE_ACOSL@ || !@HAVE_DECL_ACOSL@
167 _GL_FUNCDECL_SYS (acosl, long double, (long double x));
169 _GL_CXXALIAS_SYS (acosl, long double, (long double x));
170 _GL_CXXALIASWARN (acosl);
171 #elif defined GNULIB_POSIXCHECK
173 # if HAVE_RAW_DECL_ACOSL
174 _GL_WARN_ON_USE (acosl, "acosl is unportable - "
175 "use gnulib module mathl for portability");
183 _GL_FUNCDECL_SYS (asinf, float, (float x));
185 _GL_CXXALIAS_SYS (asinf, float, (float x));
186 _GL_CXXALIASWARN (asinf);
187 #elif defined GNULIB_POSIXCHECK
189 # if HAVE_RAW_DECL_ASINF
190 _GL_WARN_ON_USE (asinf, "asinf is unportable - "
191 "use gnulib module asinf for portability");
196 # if !@HAVE_ASINL@ || !@HAVE_DECL_ASINL@
198 _GL_FUNCDECL_SYS (asinl, long double, (long double x));
200 _GL_CXXALIAS_SYS (asinl, long double, (long double x));
201 _GL_CXXALIASWARN (asinl);
202 #elif defined GNULIB_POSIXCHECK
204 # if HAVE_RAW_DECL_ASINL
205 _GL_WARN_ON_USE (asinl, "asinl is unportable - "
206 "use gnulib module mathl for portability");
214 _GL_FUNCDECL_SYS (atanf, float, (float x));
216 _GL_CXXALIAS_SYS (atanf, float, (float x));
217 _GL_CXXALIASWARN (atanf);
218 #elif defined GNULIB_POSIXCHECK
220 # if HAVE_RAW_DECL_ATANF
221 _GL_WARN_ON_USE (atanf, "atanf is unportable - "
222 "use gnulib module atanf for portability");
227 # if !@HAVE_ATANL@ || !@HAVE_DECL_ATANL@
229 _GL_FUNCDECL_SYS (atanl, long double, (long double x));
231 _GL_CXXALIAS_SYS (atanl, long double, (long double x));
232 _GL_CXXALIASWARN (atanl);
233 #elif defined GNULIB_POSIXCHECK
235 # if HAVE_RAW_DECL_ATANL
236 _GL_WARN_ON_USE (atanl, "atanl is unportable - "
237 "use gnulib module mathl for portability");
245 _GL_FUNCDECL_SYS (atan2f, float, (float y, float x));
247 _GL_CXXALIAS_SYS (atan2f, float, (float y, float x));
248 _GL_CXXALIASWARN (atan2f);
249 #elif defined GNULIB_POSIXCHECK
251 # if HAVE_RAW_DECL_ATAN2F
252 _GL_WARN_ON_USE (atan2f, "atan2f is unportable - "
253 "use gnulib module atan2f for portability");
260 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
262 # define ceilf rpl_ceilf
264 _GL_FUNCDECL_RPL (ceilf, float, (float x));
265 _GL_CXXALIAS_RPL (ceilf, float, (float x));
267 # if !@HAVE_DECL_CEILF@
269 _GL_FUNCDECL_SYS (ceilf, float, (float x));
271 _GL_CXXALIAS_SYS (ceilf, float, (float x));
273 _GL_CXXALIASWARN (ceilf);
274 #elif defined GNULIB_POSIXCHECK
276 # if HAVE_RAW_DECL_CEILF
277 _GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
278 "use gnulib module ceilf for portability");
284 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
285 # define ceil rpl_ceil
287 _GL_FUNCDECL_RPL (ceil, double, (double x));
288 _GL_CXXALIAS_RPL (ceil, double, (double x));
290 _GL_CXXALIAS_SYS (ceil, double, (double x));
292 _GL_CXXALIASWARN (ceil);
297 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
299 # define ceill rpl_ceill
301 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
302 _GL_CXXALIAS_RPL (ceill, long double, (long double x));
304 # if !@HAVE_DECL_CEILL@
306 _GL_FUNCDECL_SYS (ceill, long double, (long double x));
308 _GL_CXXALIAS_SYS (ceill, long double, (long double x));
310 _GL_CXXALIASWARN (ceill);
311 #elif defined GNULIB_POSIXCHECK
313 # if HAVE_RAW_DECL_CEILL
314 _GL_WARN_ON_USE (ceill, "ceill is unportable - "
315 "use gnulib module ceill for portability");
320 #if @GNULIB_COPYSIGNF@
321 # if !@HAVE_COPYSIGNF@
322 _GL_FUNCDECL_SYS (copysignf, float, (float x, float y));
324 _GL_CXXALIAS_SYS (copysignf, float, (float x, float y));
325 _GL_CXXALIASWARN (copysignf);
326 #elif defined GNULIB_POSIXCHECK
328 # if HAVE_RAW_DECL_COPYSIGNF
329 _GL_WARN_ON_USE (copysignf, "copysignf is unportable - "
330 "use gnulib module copysignf for portability");
334 #if @GNULIB_COPYSIGN@
335 # if !@HAVE_COPYSIGN@
336 _GL_FUNCDECL_SYS (copysign, double, (double x, double y));
338 _GL_CXXALIAS_SYS (copysign, double, (double x, double y));
339 _GL_CXXALIASWARN (copysign);
340 #elif defined GNULIB_POSIXCHECK
342 # if HAVE_RAW_DECL_COPYSIGN
343 _GL_WARN_ON_USE (copysign, "copysign is unportable - "
344 "use gnulib module copysign for portability");
348 #if @GNULIB_COPYSIGNL@
349 # if !@HAVE_COPYSIGNL@
350 _GL_FUNCDECL_SYS (copysignl, long double, (long double x, long double y));
352 _GL_CXXALIAS_SYS (copysignl, long double, (long double x, long double y));
353 _GL_CXXALIASWARN (copysignl);
354 #elif defined GNULIB_POSIXCHECK
356 # if HAVE_RAW_DECL_COPYSIGNL
357 _GL_WARN_ON_USE (copysign, "copysignl is unportable - "
358 "use gnulib module copysignl for portability");
366 _GL_FUNCDECL_SYS (cosf, float, (float x));
368 _GL_CXXALIAS_SYS (cosf, float, (float x));
369 _GL_CXXALIASWARN (cosf);
370 #elif defined GNULIB_POSIXCHECK
372 # if HAVE_RAW_DECL_COSF
373 _GL_WARN_ON_USE (cosf, "cosf is unportable - "
374 "use gnulib module cosf for portability");
379 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
381 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
383 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
384 _GL_CXXALIASWARN (cosl);
385 #elif defined GNULIB_POSIXCHECK
387 # if HAVE_RAW_DECL_COSL
388 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
389 "use gnulib module mathl for portability");
397 _GL_FUNCDECL_SYS (coshf, float, (float x));
399 _GL_CXXALIAS_SYS (coshf, float, (float x));
400 _GL_CXXALIASWARN (coshf);
401 #elif defined GNULIB_POSIXCHECK
403 # if HAVE_RAW_DECL_COSHF
404 _GL_WARN_ON_USE (coshf, "coshf is unportable - "
405 "use gnulib module coshf for portability");
413 _GL_FUNCDECL_SYS (expf, float, (float x));
415 _GL_CXXALIAS_SYS (expf, float, (float x));
416 _GL_CXXALIASWARN (expf);
417 #elif defined GNULIB_POSIXCHECK
419 # if HAVE_RAW_DECL_EXPF
420 _GL_WARN_ON_USE (expf, "expf is unportable - "
421 "use gnulib module expf for portability");
426 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
428 _GL_FUNCDECL_SYS (expl, long double, (long double x));
430 _GL_CXXALIAS_SYS (expl, long double, (long double x));
431 _GL_CXXALIASWARN (expl);
432 #elif defined GNULIB_POSIXCHECK
434 # if HAVE_RAW_DECL_EXPL
435 _GL_WARN_ON_USE (expl, "expl is unportable - "
436 "use gnulib module mathl for portability");
444 _GL_FUNCDECL_SYS (fabsf, float, (float x));
446 _GL_CXXALIAS_SYS (fabsf, float, (float x));
447 _GL_CXXALIASWARN (fabsf);
448 #elif defined GNULIB_POSIXCHECK
450 # if HAVE_RAW_DECL_FABSF
451 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
452 "use gnulib module fabsf for portability");
458 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
460 # define fabsl rpl_fabsl
462 _GL_FUNCDECL_RPL (fabsl, long double, (long double x));
463 _GL_CXXALIAS_RPL (fabsl, long double, (long double x));
467 _GL_FUNCDECL_SYS (fabsl, long double, (long double x));
469 _GL_CXXALIAS_SYS (fabsl, long double, (long double x));
471 _GL_CXXALIASWARN (fabsl);
472 #elif defined GNULIB_POSIXCHECK
474 # if HAVE_RAW_DECL_FABSL
475 _GL_WARN_ON_USE (fabsl, "fabsl is unportable - "
476 "use gnulib module fabsl for portability");
482 # if @REPLACE_FLOORF@
483 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
485 # define floorf rpl_floorf
487 _GL_FUNCDECL_RPL (floorf, float, (float x));
488 _GL_CXXALIAS_RPL (floorf, float, (float x));
490 # if !@HAVE_DECL_FLOORF@
492 _GL_FUNCDECL_SYS (floorf, float, (float x));
494 _GL_CXXALIAS_SYS (floorf, float, (float x));
496 _GL_CXXALIASWARN (floorf);
497 #elif defined GNULIB_POSIXCHECK
499 # if HAVE_RAW_DECL_FLOORF
500 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
501 "use gnulib module floorf for portability");
507 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
508 # define floor rpl_floor
510 _GL_FUNCDECL_RPL (floor, double, (double x));
511 _GL_CXXALIAS_RPL (floor, double, (double x));
513 _GL_CXXALIAS_SYS (floor, double, (double x));
515 _GL_CXXALIASWARN (floor);
519 # if @REPLACE_FLOORL@
520 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
522 # define floorl rpl_floorl
524 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
525 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
527 # if !@HAVE_DECL_FLOORL@
529 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
531 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
533 _GL_CXXALIASWARN (floorl);
534 #elif defined GNULIB_POSIXCHECK
536 # if HAVE_RAW_DECL_FLOORL
537 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
538 "use gnulib module floorl for portability");
545 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
547 # define fmaf rpl_fmaf
549 _GL_FUNCDECL_RPL (fmaf, float, (float x, float y, float z));
550 _GL_CXXALIAS_RPL (fmaf, float, (float x, float y, float z));
553 _GL_FUNCDECL_SYS (fmaf, float, (float x, float y, float z));
555 _GL_CXXALIAS_SYS (fmaf, float, (float x, float y, float z));
557 _GL_CXXALIASWARN (fmaf);
558 #elif defined GNULIB_POSIXCHECK
560 # if HAVE_RAW_DECL_FMAF
561 _GL_WARN_ON_USE (fmaf, "fmaf is unportable - "
562 "use gnulib module fmaf for portability");
568 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
572 _GL_FUNCDECL_RPL (fma, double, (double x, double y, double z));
573 _GL_CXXALIAS_RPL (fma, double, (double x, double y, double z));
576 _GL_FUNCDECL_SYS (fma, double, (double x, double y, double z));
578 _GL_CXXALIAS_SYS (fma, double, (double x, double y, double z));
580 _GL_CXXALIASWARN (fma);
581 #elif defined GNULIB_POSIXCHECK
583 # if HAVE_RAW_DECL_FMA
584 _GL_WARN_ON_USE (fma, "fma is unportable - "
585 "use gnulib module fma for portability");
591 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
593 # define fmal rpl_fmal
595 _GL_FUNCDECL_RPL (fmal, long double,
596 (long double x, long double y, long double z));
597 _GL_CXXALIAS_RPL (fmal, long double,
598 (long double x, long double y, long double z));
601 _GL_FUNCDECL_SYS (fmal, long double,
602 (long double x, long double y, long double z));
604 _GL_CXXALIAS_SYS (fmal, long double,
605 (long double x, long double y, long double z));
607 _GL_CXXALIASWARN (fmal);
608 #elif defined GNULIB_POSIXCHECK
610 # if HAVE_RAW_DECL_FMAL
611 _GL_WARN_ON_USE (fmal, "fmal is unportable - "
612 "use gnulib module fmal for portability");
620 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
622 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
623 _GL_CXXALIASWARN (fmodf);
624 #elif defined GNULIB_POSIXCHECK
626 # if HAVE_RAW_DECL_FMODF
627 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
628 "use gnulib module fmodf for portability");
634 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
636 # define fmodl rpl_fmodl
638 _GL_FUNCDECL_RPL (fmodl, long double, (long double x, long double y));
639 _GL_CXXALIAS_RPL (fmodl, long double, (long double x, long double y));
643 _GL_FUNCDECL_SYS (fmodl, long double, (long double x, long double y));
645 _GL_CXXALIAS_SYS (fmodl, long double, (long double x, long double y));
647 _GL_CXXALIASWARN (fmodl);
648 #elif defined GNULIB_POSIXCHECK
650 # if HAVE_RAW_DECL_FMODL
651 _GL_WARN_ON_USE (fmodl, "fmodl is unportable - "
652 "use gnulib module fmodl for portability");
660 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
661 If x is zero: mantissa = x, exp = 0.
662 If x is infinite or NaN: mantissa = x, exp unspecified.
663 Store exp in *EXPPTR and return mantissa. */
665 # if @REPLACE_FREXPF@
666 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
668 # define frexpf rpl_frexpf
670 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
671 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
675 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
677 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
679 _GL_CXXALIASWARN (frexpf);
680 #elif defined GNULIB_POSIXCHECK
682 # if HAVE_RAW_DECL_FREXPF
683 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
684 "use gnulib module frexpf for portability");
691 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
692 If x is zero: mantissa = x, exp = 0.
693 If x is infinite or NaN: mantissa = x, exp unspecified.
694 Store exp in *EXPPTR and return mantissa. */
697 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
698 # define frexp rpl_frexp
700 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
701 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
703 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
705 _GL_CXXALIASWARN (frexp);
706 #elif defined GNULIB_POSIXCHECK
708 /* Assume frexp is always declared. */
709 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
710 "use gnulib module frexp for portability");
716 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
717 If x is zero: mantissa = x, exp = 0.
718 If x is infinite or NaN: mantissa = x, exp unspecified.
719 Store exp in *EXPPTR and return mantissa. */
720 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
721 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
723 # define frexpl rpl_frexpl
725 _GL_FUNCDECL_RPL (frexpl, long double,
726 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
727 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
729 # if !@HAVE_DECL_FREXPL@
730 _GL_FUNCDECL_SYS (frexpl, long double,
731 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
734 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
737 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
738 _GL_CXXALIASWARN (frexpl);
740 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
742 # if HAVE_RAW_DECL_FREXPL
743 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
744 "use gnulib module frexpl for portability");
749 /* Return x * 2^exp. */
753 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
755 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
756 _GL_CXXALIASWARN (ldexpf);
757 #elif defined GNULIB_POSIXCHECK
759 # if HAVE_RAW_DECL_LDEXPF
760 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
761 "use gnulib module ldexpf for portability");
765 /* Return x * 2^exp. */
766 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
767 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
769 # define ldexpl rpl_ldexpl
771 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
772 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
774 # if !@HAVE_DECL_LDEXPL@
775 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
778 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
782 _GL_CXXALIASWARN (ldexpl);
784 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
786 # if HAVE_RAW_DECL_LDEXPL
787 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
788 "use gnulib module ldexpl for portability");
794 # if !@HAVE_DECL_LOGB@
795 _GL_EXTERN_C double logb (double x);
797 #elif defined GNULIB_POSIXCHECK
799 # if HAVE_RAW_DECL_LOGB
800 _GL_WARN_ON_USE (logb, "logb is unportable - "
801 "use gnulib module logb for portability");
809 _GL_FUNCDECL_SYS (logf, float, (float x));
811 _GL_CXXALIAS_SYS (logf, float, (float x));
812 _GL_CXXALIASWARN (logf);
813 #elif defined GNULIB_POSIXCHECK
815 # if HAVE_RAW_DECL_LOGF
816 _GL_WARN_ON_USE (logf, "logf is unportable - "
817 "use gnulib module logf for portability");
822 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
824 _GL_FUNCDECL_SYS (logl, long double, (long double x));
826 _GL_CXXALIAS_SYS (logl, long double, (long double x));
827 _GL_CXXALIASWARN (logl);
828 #elif defined GNULIB_POSIXCHECK
830 # if HAVE_RAW_DECL_LOGL
831 _GL_WARN_ON_USE (logl, "logl is unportable - "
832 "use gnulib module mathl for portability");
840 _GL_FUNCDECL_SYS (log10f, float, (float x));
842 _GL_CXXALIAS_SYS (log10f, float, (float x));
843 _GL_CXXALIASWARN (log10f);
844 #elif defined GNULIB_POSIXCHECK
846 # if HAVE_RAW_DECL_LOG10F
847 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
848 "use gnulib module log10f for portability");
853 # if !@HAVE_LOG10L@ || !@HAVE_DECL_LOG10L@
855 _GL_FUNCDECL_SYS (log10l, long double, (long double x));
857 _GL_CXXALIAS_SYS (log10l, long double, (long double x));
858 _GL_CXXALIASWARN (log10l);
859 #elif defined GNULIB_POSIXCHECK
861 # if HAVE_RAW_DECL_LOG10L
862 _GL_WARN_ON_USE (log10l, "log10l is unportable - "
863 "use gnulib module log10l for portability");
870 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
872 # define modff rpl_modff
874 _GL_FUNCDECL_RPL (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
875 _GL_CXXALIAS_RPL (modff, float, (float x, float *iptr));
879 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
881 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
883 _GL_CXXALIASWARN (modff);
884 #elif defined GNULIB_POSIXCHECK
886 # if HAVE_RAW_DECL_MODFF
887 _GL_WARN_ON_USE (modff, "modff is unportable - "
888 "use gnulib module modff for portability");
894 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
896 # define modf rpl_modf
898 _GL_FUNCDECL_RPL (modf, double, (double x, double *iptr) _GL_ARG_NONNULL ((2)));
899 _GL_CXXALIAS_RPL (modf, double, (double x, double *iptr));
901 _GL_CXXALIAS_SYS (modf, double, (double x, double *iptr));
903 _GL_CXXALIASWARN (modf);
904 #elif defined GNULIB_POSIXCHECK
906 # if HAVE_RAW_DECL_MODF
907 _GL_WARN_ON_USE (modf, "modf has portability problems - "
908 "use gnulib module modf for portability");
915 _GL_FUNCDECL_SYS (modfl, long double, (long double x, long double *iptr)
916 _GL_ARG_NONNULL ((2)));
918 _GL_CXXALIAS_SYS (modfl, long double, (long double x, long double *iptr));
919 _GL_CXXALIASWARN (modfl);
920 #elif defined GNULIB_POSIXCHECK
922 # if HAVE_RAW_DECL_MODFL
923 _GL_WARN_ON_USE (modfl, "modfl is unportable - "
924 "use gnulib module modfl for portability");
932 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
934 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
935 _GL_CXXALIASWARN (powf);
936 #elif defined GNULIB_POSIXCHECK
938 # if HAVE_RAW_DECL_POWF
939 _GL_WARN_ON_USE (powf, "powf is unportable - "
940 "use gnulib module powf for portability");
945 #if @GNULIB_REMAINDERF@
946 # if !@HAVE_REMAINDERF@
947 _GL_FUNCDECL_SYS (remainderf, float, (float x, float y));
949 _GL_CXXALIAS_SYS (remainderf, float, (float x, float y));
950 _GL_CXXALIASWARN (remainderf);
951 #elif defined GNULIB_POSIXCHECK
953 # if HAVE_RAW_DECL_REMAINDERF
954 _GL_WARN_ON_USE (remainderf, "remainderf is unportable - "
955 "use gnulib module remainderf for portability");
959 #if @GNULIB_REMAINDER@
960 # if !@HAVE_REMAINDER@ || !@HAVE_DECL_REMAINDER@
961 _GL_FUNCDECL_SYS (remainder, double, (double x, double y));
963 _GL_CXXALIAS_SYS (remainder, double, (double x, double y));
964 _GL_CXXALIASWARN (remainder);
965 #elif defined GNULIB_POSIXCHECK
967 # if HAVE_RAW_DECL_REMAINDER
968 _GL_WARN_ON_USE (remainder, "remainder is unportable - "
969 "use gnulib module remainder for portability");
973 #if @GNULIB_REMAINDERL@
974 # if !@HAVE_REMAINDERL@
975 _GL_FUNCDECL_SYS (remainderl, long double, (long double x, long double y));
977 _GL_CXXALIAS_SYS (remainderl, long double, (long double x, long double y));
978 _GL_CXXALIASWARN (remainderl);
979 #elif defined GNULIB_POSIXCHECK
981 # if HAVE_RAW_DECL_REMAINDERL
982 _GL_WARN_ON_USE (remainderl, "remainderl is unportable - "
983 "use gnulib module remainderl for portability");
990 _GL_FUNCDECL_SYS (rintf, float, (float x));
992 _GL_CXXALIAS_SYS (rintf, float, (float x));
993 _GL_CXXALIASWARN (rintf);
994 #elif defined GNULIB_POSIXCHECK
996 # if HAVE_RAW_DECL_RINTF
997 _GL_WARN_ON_USE (rintf, "rintf is unportable - "
998 "use gnulib module rintf for portability");
1004 _GL_FUNCDECL_SYS (rint, double, (double x));
1006 _GL_CXXALIAS_SYS (rint, double, (double x));
1007 _GL_CXXALIASWARN (rint);
1008 #elif defined GNULIB_POSIXCHECK
1010 # if HAVE_RAW_DECL_RINT
1011 _GL_WARN_ON_USE (rint, "rint is unportable - "
1012 "use gnulib module rint for portability");
1018 _GL_FUNCDECL_SYS (rintl, long double, (long double x));
1020 _GL_CXXALIAS_SYS (rintl, long double, (long double x));
1021 _GL_CXXALIASWARN (rintl);
1022 #elif defined GNULIB_POSIXCHECK
1024 # if HAVE_RAW_DECL_RINTL
1025 _GL_WARN_ON_USE (rintl, "rintl is unportable - "
1026 "use gnulib module rintl for portability");
1032 # if @REPLACE_ROUNDF@
1033 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1035 # define roundf rpl_roundf
1037 _GL_FUNCDECL_RPL (roundf, float, (float x));
1038 _GL_CXXALIAS_RPL (roundf, float, (float x));
1040 # if !@HAVE_DECL_ROUNDF@
1041 _GL_FUNCDECL_SYS (roundf, float, (float x));
1043 _GL_CXXALIAS_SYS (roundf, float, (float x));
1045 _GL_CXXALIASWARN (roundf);
1046 #elif defined GNULIB_POSIXCHECK
1048 # if HAVE_RAW_DECL_ROUNDF
1049 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
1050 "use gnulib module roundf for portability");
1055 # if @REPLACE_ROUND@
1056 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1058 # define round rpl_round
1060 _GL_FUNCDECL_RPL (round, double, (double x));
1061 _GL_CXXALIAS_RPL (round, double, (double x));
1063 # if !@HAVE_DECL_ROUND@
1064 _GL_FUNCDECL_SYS (round, double, (double x));
1066 _GL_CXXALIAS_SYS (round, double, (double x));
1068 _GL_CXXALIASWARN (round);
1069 #elif defined GNULIB_POSIXCHECK
1071 # if HAVE_RAW_DECL_ROUND
1072 _GL_WARN_ON_USE (round, "round is unportable - "
1073 "use gnulib module round for portability");
1078 # if @REPLACE_ROUNDL@
1079 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1081 # define roundl rpl_roundl
1083 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
1084 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
1086 # if !@HAVE_DECL_ROUNDL@
1087 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
1089 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
1091 _GL_CXXALIASWARN (roundl);
1092 #elif defined GNULIB_POSIXCHECK
1094 # if HAVE_RAW_DECL_ROUNDL
1095 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
1096 "use gnulib module roundl for portability");
1104 _GL_FUNCDECL_SYS (sinf, float, (float x));
1106 _GL_CXXALIAS_SYS (sinf, float, (float x));
1107 _GL_CXXALIASWARN (sinf);
1108 #elif defined GNULIB_POSIXCHECK
1110 # if HAVE_RAW_DECL_SINF
1111 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
1112 "use gnulib module sinf for portability");
1117 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
1119 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
1121 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
1122 _GL_CXXALIASWARN (sinl);
1123 #elif defined GNULIB_POSIXCHECK
1125 # if HAVE_RAW_DECL_SINL
1126 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
1127 "use gnulib module mathl for portability");
1135 _GL_FUNCDECL_SYS (sinhf, float, (float x));
1137 _GL_CXXALIAS_SYS (sinhf, float, (float x));
1138 _GL_CXXALIASWARN (sinhf);
1139 #elif defined GNULIB_POSIXCHECK
1141 # if HAVE_RAW_DECL_SINHF
1142 _GL_WARN_ON_USE (sinhf, "sinhf is unportable - "
1143 "use gnulib module sinhf for portability");
1151 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
1153 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
1154 _GL_CXXALIASWARN (sqrtf);
1155 #elif defined GNULIB_POSIXCHECK
1157 # if HAVE_RAW_DECL_SQRTF
1158 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
1159 "use gnulib module sqrtf for portability");
1164 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
1166 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
1168 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
1169 _GL_CXXALIASWARN (sqrtl);
1170 #elif defined GNULIB_POSIXCHECK
1172 # if HAVE_RAW_DECL_SQRTL
1173 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
1174 "use gnulib module mathl for portability");
1182 _GL_FUNCDECL_SYS (tanf, float, (float x));
1184 _GL_CXXALIAS_SYS (tanf, float, (float x));
1185 _GL_CXXALIASWARN (tanf);
1186 #elif defined GNULIB_POSIXCHECK
1188 # if HAVE_RAW_DECL_TANF
1189 _GL_WARN_ON_USE (tanf, "tanf is unportable - "
1190 "use gnulib module tanf for portability");
1195 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
1197 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
1199 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
1200 _GL_CXXALIASWARN (tanl);
1201 #elif defined GNULIB_POSIXCHECK
1203 # if HAVE_RAW_DECL_TANL
1204 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
1205 "use gnulib module mathl for portability");
1213 _GL_FUNCDECL_SYS (tanhf, float, (float x));
1215 _GL_CXXALIAS_SYS (tanhf, float, (float x));
1216 _GL_CXXALIASWARN (tanhf);
1217 #elif defined GNULIB_POSIXCHECK
1219 # if HAVE_RAW_DECL_TANHF
1220 _GL_WARN_ON_USE (tanhf, "tanhf is unportable - "
1221 "use gnulib module tanhf for portability");
1227 # if @REPLACE_TRUNCF@
1228 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1229 # define truncf rpl_truncf
1231 _GL_FUNCDECL_RPL (truncf, float, (float x));
1232 _GL_CXXALIAS_RPL (truncf, float, (float x));
1234 # if !@HAVE_DECL_TRUNCF@
1235 _GL_FUNCDECL_SYS (truncf, float, (float x));
1237 _GL_CXXALIAS_SYS (truncf, float, (float x));
1239 _GL_CXXALIASWARN (truncf);
1240 #elif defined GNULIB_POSIXCHECK
1242 # if HAVE_RAW_DECL_TRUNCF
1243 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
1244 "use gnulib module truncf for portability");
1249 # if @REPLACE_TRUNC@
1250 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1251 # define trunc rpl_trunc
1253 _GL_FUNCDECL_RPL (trunc, double, (double x));
1254 _GL_CXXALIAS_RPL (trunc, double, (double x));
1256 # if !@HAVE_DECL_TRUNC@
1257 _GL_FUNCDECL_SYS (trunc, double, (double x));
1259 _GL_CXXALIAS_SYS (trunc, double, (double x));
1261 _GL_CXXALIASWARN (trunc);
1262 #elif defined GNULIB_POSIXCHECK
1264 # if HAVE_RAW_DECL_TRUNC
1265 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
1266 "use gnulib module trunc for portability");
1271 # if @REPLACE_TRUNCL@
1272 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1274 # define truncl rpl_truncl
1276 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
1277 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
1279 # if !@HAVE_DECL_TRUNCL@
1280 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
1282 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
1284 _GL_CXXALIASWARN (truncl);
1285 #elif defined GNULIB_POSIXCHECK
1287 # if HAVE_RAW_DECL_TRUNCL
1288 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
1289 "use gnulib module truncl for portability");
1294 /* Definitions of function-like macros come here, after the function
1298 #if @GNULIB_ISFINITE@
1299 # if @REPLACE_ISFINITE@
1300 _GL_EXTERN_C int gl_isfinitef (float x);
1301 _GL_EXTERN_C int gl_isfinited (double x);
1302 _GL_EXTERN_C int gl_isfinitel (long double x);
1304 # define isfinite(x) \
1305 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
1306 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
1311 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isfinite)
1313 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite)
1316 #elif defined GNULIB_POSIXCHECK
1317 # if defined isfinite
1318 _GL_WARN_REAL_FLOATING_DECL (isfinite);
1320 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
1326 # if @REPLACE_ISINF@
1327 _GL_EXTERN_C int gl_isinff (float x);
1328 _GL_EXTERN_C int gl_isinfd (double x);
1329 _GL_EXTERN_C int gl_isinfl (long double x);
1332 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
1333 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
1338 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isinf)
1340 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf)
1343 #elif defined GNULIB_POSIXCHECK
1345 _GL_WARN_REAL_FLOATING_DECL (isinf);
1347 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
1353 /* Test for NaN for 'float' numbers. */
1355 /* The original <math.h> included above provides a declaration of isnan macro
1356 or (older) isnanf function. */
1358 /* GCC 4.0 and newer provides three built-ins for isnan. */
1360 # define isnanf(x) __builtin_isnanf ((float)(x))
1361 # elif defined isnan
1363 # define isnanf(x) isnan ((float)(x))
1366 /* Test whether X is a NaN. */
1368 # define isnanf rpl_isnanf
1369 _GL_EXTERN_C int isnanf (float x);
1374 /* Test for NaN for 'double' numbers.
1375 This function is a gnulib extension, unlike isnan() which applied only
1376 to 'double' numbers earlier but now is a type-generic macro. */
1378 /* The original <math.h> included above provides a declaration of isnan
1381 /* GCC 4.0 and newer provides three built-ins for isnan. */
1383 # define isnand(x) __builtin_isnan ((double)(x))
1386 # define isnand(x) isnan ((double)(x))
1389 /* Test whether X is a NaN. */
1391 # define isnand rpl_isnand
1392 _GL_EXTERN_C int isnand (double x);
1397 /* Test for NaN for 'long double' numbers. */
1399 /* The original <math.h> included above provides a declaration of isnan
1400 macro or (older) isnanl function. */
1402 /* GCC 4.0 and newer provides three built-ins for isnan. */
1404 # define isnanl(x) __builtin_isnanl ((long double)(x))
1405 # elif defined isnan
1407 # define isnanl(x) isnan ((long double)(x))
1410 /* Test whether X is a NaN. */
1412 # define isnanl rpl_isnanl
1413 _GL_EXTERN_C int isnanl (long double x) _GL_ATTRIBUTE_CONST;
1417 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
1419 # if @REPLACE_ISNAN@
1420 /* We can't just use the isnanf macro (e.g.) as exposed by
1421 isnanf.h (e.g.) here, because those may end up being macros
1422 that recursively expand back to isnan. So use the gnulib
1423 replacements for them directly. */
1424 # if @HAVE_ISNANF@ && __GNUC__ >= 4
1425 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
1427 _GL_EXTERN_C int rpl_isnanf (float x);
1428 # define gl_isnan_f(x) rpl_isnanf (x)
1430 # if @HAVE_ISNAND@ && __GNUC__ >= 4
1431 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
1433 _GL_EXTERN_C int rpl_isnand (double x);
1434 # define gl_isnan_d(x) rpl_isnand (x)
1436 # if @HAVE_ISNANL@ && __GNUC__ >= 4
1437 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
1439 _GL_EXTERN_C int rpl_isnanl (long double x) _GL_ATTRIBUTE_CONST;
1440 # define gl_isnan_l(x) rpl_isnanl (x)
1444 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
1445 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
1447 # elif __GNUC__ >= 4
1450 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
1451 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
1452 __builtin_isnanf ((float)(x)))
1456 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan)
1458 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan)
1461 /* Ensure isnan is a macro. */
1463 # define isnan isnan
1466 #elif defined GNULIB_POSIXCHECK
1468 _GL_WARN_REAL_FLOATING_DECL (isnan);
1470 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
1475 #if @GNULIB_SIGNBIT@
1476 # if @REPLACE_SIGNBIT_USING_GCC@
1478 /* GCC 4.0 and newer provides three built-ins for signbit. */
1479 # define signbit(x) \
1480 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
1481 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
1482 __builtin_signbitf (x))
1484 # if @REPLACE_SIGNBIT@
1486 _GL_EXTERN_C int gl_signbitf (float arg);
1487 _GL_EXTERN_C int gl_signbitd (double arg);
1488 _GL_EXTERN_C int gl_signbitl (long double arg);
1489 # if __GNUC__ >= 2 && !defined __STRICT_ANSI__
1490 # define _GL_NUM_UINT_WORDS(type) \
1491 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
1492 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
1493 # define gl_signbitf_OPTIMIZED_MACRO
1494 # define gl_signbitf(arg) \
1495 ({ union { float _value; \
1496 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
1498 _m._value = (arg); \
1499 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
1502 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
1503 # define gl_signbitd_OPTIMIZED_MACRO
1504 # define gl_signbitd(arg) \
1505 ({ union { double _value; \
1506 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
1508 _m._value = (arg); \
1509 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
1512 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1513 # define gl_signbitl_OPTIMIZED_MACRO
1514 # define gl_signbitl(arg) \
1515 ({ union { long double _value; \
1516 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1518 _m._value = (arg); \
1519 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
1523 # define signbit(x) \
1524 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1525 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1530 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (signbit)
1532 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit)
1535 #elif defined GNULIB_POSIXCHECK
1536 # if defined signbit
1537 _GL_WARN_REAL_FLOATING_DECL (signbit);
1539 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1544 #endif /* _@GUARD_PREFIX@_MATH_H */
1545 #endif /* _@GUARD_PREFIX@_MATH_H */