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d6c064e914
This patch ensures that the C99 and C11 features required by C++ are defined according to the value of the __cplusplus macro, and not just because G++ always defines _GNU_SOURCE. This will allow G++ to stop defining _GNU_SOURCE some day, without causing the C99 and C11 interfaces to disappear for C++ programs. [BZ #21326] * include/features.h [__cplusplus >= 201103] (__USE_ISOC99): Define. [__cplusplus >= 201703] (__USE_ISOCXX17, __USE_ISOC11): Define. * math/Makefile (test-math-cxx11): New test. * math/test-math-cxx11.cc: New file.
161 lines
3.4 KiB
C++
161 lines
3.4 KiB
C++
/* Test C99 math functions are available in C++11 without _GNU_SOURCE.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#undef _GNU_SOURCE
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#undef _DEFAULT_SOURCE
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#undef _XOPEN_SOURCE
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#undef _POSIX_SOURCE
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#undef _POSIX_C_SOURCE
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// __STRICT_ANSI__ gets defined by -std=c++11 in CFLAGS
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#include <math.h>
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#include <stdio.h>
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static int
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do_test (void)
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{
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#ifdef _GNU_SOURCE
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printf ("FAIL: _GNU_SOURCE is defined.\n");
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return 1;
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#endif
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#if __cplusplus >= 201103L
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/* Verify that C11 math functions and types are defined for C++11,
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without _GNU_SOURCE being defined. [BZ #21326] */
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(void) FP_INFINITE;
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(void) FP_NAN;
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(void) FP_NORMAL;
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(void) FP_SUBNORMAL;
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(void) FP_ZERO;
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double_t d = 1.0;
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(void) d;
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float_t f = 1.0f;
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(void) f;
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(void) acosh;
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(void) acoshf;
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(void) acoshl;
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(void) asinh;
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(void) asinhf;
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(void) asinhl;
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(void) atanh;
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(void) atanhf;
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(void) atanhl;
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(void) cbrt;
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(void) cbrtf;
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(void) cbrtl;
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(void) copysign;
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(void) copysignf;
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(void) copysignl;
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(void) erf;
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(void) erff;
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(void) erfl;
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(void) erfc;
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(void) erfcf;
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(void) erfcl;
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(void) exp2;
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(void) exp2f;
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(void) exp2l;
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(void) expm1;
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(void) expm1f;
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(void) expm1l;
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(void) fdim;
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(void) fdimf;
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(void) fdiml;
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(void) fma;
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(void) fmaf;
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(void) fmal;
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(void) fmax;
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(void) fmaxf;
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(void) fmaxl;
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(void) fmin;
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(void) fminf;
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(void) fminl;
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(void) hypot;
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(void) hypotf;
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(void) hypotl;
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(void) ilogb;
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(void) ilogbf;
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(void) ilogbl;
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(void) lgamma;
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(void) lgammaf;
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(void) lgammal;
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(void) llrint;
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(void) llrintf;
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(void) llrintl;
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(void) llround;
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(void) llroundf;
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(void) llroundl;
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(void) log1p;
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(void) log1pf;
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(void) log1pl;
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(void) log2;
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(void) log2f;
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(void) log2l;
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(void) logb;
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(void) logbf;
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(void) logbl;
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(void) lrint;
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(void) lrintf;
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(void) lrintl;
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(void) lround;
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(void) lroundf;
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(void) lroundl;
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(void) nan;
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(void) nanf;
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(void) nanl;
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(void) nearbyint;
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(void) nearbyintf;
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(void) nearbyintl;
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(void) nextafter;
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(void) nextafterf;
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(void) nextafterl;
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(void) nexttoward;
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(void) nexttowardf;
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(void) nexttowardl;
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(void) remainder;
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(void) remainderf;
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(void) remainderl;
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(void) remquo;
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(void) remquof;
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(void) remquol;
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(void) rint;
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(void) rintf;
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(void) rintl;
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(void) round;
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(void) roundf;
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(void) roundl;
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(void) scalbln;
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(void) scalblnf;
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(void) scalblnl;
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(void) scalbn;
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(void) scalbnf;
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(void) scalbnl;
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(void) tgamma;
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(void) tgammaf;
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(void) tgammal;
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(void) trunc;
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(void) truncf;
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(void) truncl;
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printf ("PASS: C11 math functions present in C++11 without _GNU_SOURCE.\n");
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#else
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printf ("UNSUPPORTED: C++11 not enabled.\n");
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#endif
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return 0;
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}
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#include <support/test-driver.c>
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