libstdc++: Remove handling for underscore-prefixed libm functions [PR111638]

The checks in linkage.m4 try to support math functions prefixed with
underscores, like _acosf and _isinf. However, that doesn't work because
they're renamed to the standard names using a macro, but then <cmath>
undefines that macro again.

This simply removes everything related to those underscored functions.

libstdc++-v3/ChangeLog:

	PR libstdc++/111638
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* linkage.m4 (GLIBCXX_MAYBE_UNDERSCORED_FUNCS): Remove.
	(GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1): Do not check for _foo.
	(GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1): Likewise.
	(GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2): Likewise.
	(GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3): Likewise.
	(GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2): Do not use
	GLIBCXX_MAYBE_UNDERSCORED_FUNCS.

1 files changed, 0 insertions, 506 deletions

diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in
index 4af7339..c0aa51a 100644
--- a/libstdc++-v3/config.h.in
+++ b/libstdc++-v3/config.h.in
@@ -541,195 +541,9 @@
 /* Define to 1 if you have the <xlocale.h> header file. */
 #undef HAVE_XLOCALE_H
 
-/* Define to 1 if you have the `_acosf' function. */
-#undef HAVE__ACOSF
-
-/* Define to 1 if you have the `_acosl' function. */
-#undef HAVE__ACOSL
-
 /* Define to 1 if you have the `_aligned_malloc' function. */
 #undef HAVE__ALIGNED_MALLOC
 
-/* Define to 1 if you have the `_asinf' function. */
-#undef HAVE__ASINF
-
-/* Define to 1 if you have the `_asinl' function. */
-#undef HAVE__ASINL
-
-/* Define to 1 if you have the `_atan2f' function. */
-#undef HAVE__ATAN2F
-
-/* Define to 1 if you have the `_atan2l' function. */
-#undef HAVE__ATAN2L
-
-/* Define to 1 if you have the `_atanf' function. */
-#undef HAVE__ATANF
-
-/* Define to 1 if you have the `_atanl' function. */
-#undef HAVE__ATANL
-
-/* Define to 1 if you have the `_ceilf' function. */
-#undef HAVE__CEILF
-
-/* Define to 1 if you have the `_ceill' function. */
-#undef HAVE__CEILL
-
-/* Define to 1 if you have the `_cosf' function. */
-#undef HAVE__COSF
-
-/* Define to 1 if you have the `_coshf' function. */
-#undef HAVE__COSHF
-
-/* Define to 1 if you have the `_coshl' function. */
-#undef HAVE__COSHL
-
-/* Define to 1 if you have the `_cosl' function. */
-#undef HAVE__COSL
-
-/* Define to 1 if you have the `_expf' function. */
-#undef HAVE__EXPF
-
-/* Define to 1 if you have the `_expl' function. */
-#undef HAVE__EXPL
-
-/* Define to 1 if you have the `_fabsf' function. */
-#undef HAVE__FABSF
-
-/* Define to 1 if you have the `_fabsl' function. */
-#undef HAVE__FABSL
-
-/* Define to 1 if you have the `_finite' function. */
-#undef HAVE__FINITE
-
-/* Define to 1 if you have the `_finitef' function. */
-#undef HAVE__FINITEF
-
-/* Define to 1 if you have the `_finitel' function. */
-#undef HAVE__FINITEL
-
-/* Define to 1 if you have the `_floorf' function. */
-#undef HAVE__FLOORF
-
-/* Define to 1 if you have the `_floorl' function. */
-#undef HAVE__FLOORL
-
-/* Define to 1 if you have the `_fmodf' function. */
-#undef HAVE__FMODF
-
-/* Define to 1 if you have the `_fmodl' function. */
-#undef HAVE__FMODL
-
-/* Define to 1 if you have the `_fpclass' function. */
-#undef HAVE__FPCLASS
-
-/* Define to 1 if you have the `_frexpf' function. */
-#undef HAVE__FREXPF
-
-/* Define to 1 if you have the `_frexpl' function. */
-#undef HAVE__FREXPL
-
-/* Define to 1 if you have the `_hypot' function. */
-#undef HAVE__HYPOT
-
-/* Define to 1 if you have the `_hypotf' function. */
-#undef HAVE__HYPOTF
-
-/* Define to 1 if you have the `_hypotl' function. */
-#undef HAVE__HYPOTL
-
-/* Define to 1 if you have the `_isinf' function. */
-#undef HAVE__ISINF
-
-/* Define to 1 if you have the `_isinff' function. */
-#undef HAVE__ISINFF
-
-/* Define to 1 if you have the `_isinfl' function. */
-#undef HAVE__ISINFL
-
-/* Define to 1 if you have the `_isnan' function. */
-#undef HAVE__ISNAN
-
-/* Define to 1 if you have the `_isnanf' function. */
-#undef HAVE__ISNANF
-
-/* Define to 1 if you have the `_isnanl' function. */
-#undef HAVE__ISNANL
-
-/* Define to 1 if you have the `_ldexpf' function. */
-#undef HAVE__LDEXPF
-
-/* Define to 1 if you have the `_ldexpl' function. */
-#undef HAVE__LDEXPL
-
-/* Define to 1 if you have the `_log10f' function. */
-#undef HAVE__LOG10F
-
-/* Define to 1 if you have the `_log10l' function. */
-#undef HAVE__LOG10L
-
-/* Define to 1 if you have the `_logf' function. */
-#undef HAVE__LOGF
-
-/* Define to 1 if you have the `_logl' function. */
-#undef HAVE__LOGL
-
-/* Define to 1 if you have the `_modf' function. */
-#undef HAVE__MODF
-
-/* Define to 1 if you have the `_modff' function. */
-#undef HAVE__MODFF
-
-/* Define to 1 if you have the `_modfl' function. */
-#undef HAVE__MODFL
-
-/* Define to 1 if you have the `_powf' function. */
-#undef HAVE__POWF
-
-/* Define to 1 if you have the `_powl' function. */
-#undef HAVE__POWL
-
-/* Define to 1 if you have the `_qfpclass' function. */
-#undef HAVE__QFPCLASS
-
-/* Define to 1 if you have the `_sincos' function. */
-#undef HAVE__SINCOS
-
-/* Define to 1 if you have the `_sincosf' function. */
-#undef HAVE__SINCOSF
-
-/* Define to 1 if you have the `_sincosl' function. */
-#undef HAVE__SINCOSL
-
-/* Define to 1 if you have the `_sinf' function. */
-#undef HAVE__SINF
-
-/* Define to 1 if you have the `_sinhf' function. */
-#undef HAVE__SINHF
-
-/* Define to 1 if you have the `_sinhl' function. */
-#undef HAVE__SINHL
-
-/* Define to 1 if you have the `_sinl' function. */
-#undef HAVE__SINL
-
-/* Define to 1 if you have the `_sqrtf' function. */
-#undef HAVE__SQRTF
-
-/* Define to 1 if you have the `_sqrtl' function. */
-#undef HAVE__SQRTL
-
-/* Define to 1 if you have the `_tanf' function. */
-#undef HAVE__TANF
-
-/* Define to 1 if you have the `_tanhf' function. */
-#undef HAVE__TANHF
-
-/* Define to 1 if you have the `_tanhl' function. */
-#undef HAVE__TANHL
-
-/* Define to 1 if you have the `_tanl' function. */
-#undef HAVE__TANL
-
 /* Define to 1 if you have the `_wfopen' function. */
 #undef HAVE__WFOPEN
 
@@ -1125,323 +939,3 @@
 #if __cplusplus >= 201103L
 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT
 #endif
-
-#if defined (HAVE__ACOSF) && ! defined (HAVE_ACOSF)
-# define HAVE_ACOSF 1
-# define acosf _acosf
-#endif
-
-#if defined (HAVE__ACOSL) && ! defined (HAVE_ACOSL)
-# define HAVE_ACOSL 1
-# define acosl _acosl
-#endif
-
-#if defined (HAVE__ASINF) && ! defined (HAVE_ASINF)
-# define HAVE_ASINF 1
-# define asinf _asinf
-#endif
-
-#if defined (HAVE__ASINL) && ! defined (HAVE_ASINL)
-# define HAVE_ASINL 1
-# define asinl _asinl
-#endif
-
-#if defined (HAVE__ATAN2F) && ! defined (HAVE_ATAN2F)
-# define HAVE_ATAN2F 1
-# define atan2f _atan2f
-#endif
-
-#if defined (HAVE__ATAN2L) && ! defined (HAVE_ATAN2L)
-# define HAVE_ATAN2L 1
-# define atan2l _atan2l
-#endif
-
-#if defined (HAVE__ATANF) && ! defined (HAVE_ATANF)
-# define HAVE_ATANF 1
-# define atanf _atanf
-#endif
-
-#if defined (HAVE__ATANL) && ! defined (HAVE_ATANL)
-# define HAVE_ATANL 1
-# define atanl _atanl
-#endif
-
-#if defined (HAVE__CEILF) && ! defined (HAVE_CEILF)
-# define HAVE_CEILF 1
-# define ceilf _ceilf
-#endif
-
-#if defined (HAVE__CEILL) && ! defined (HAVE_CEILL)
-# define HAVE_CEILL 1
-# define ceill _ceill
-#endif
-
-#if defined (HAVE__COSF) && ! defined (HAVE_COSF)
-# define HAVE_COSF 1
-# define cosf _cosf
-#endif
-
-#if defined (HAVE__COSHF) && ! defined (HAVE_COSHF)
-# define HAVE_COSHF 1
-# define coshf _coshf
-#endif
-
-#if defined (HAVE__COSHL) && ! defined (HAVE_COSHL)
-# define HAVE_COSHL 1
-# define coshl _coshl
-#endif
-
-#if defined (HAVE__COSL) && ! defined (HAVE_COSL)
-# define HAVE_COSL 1
-# define cosl _cosl
-#endif
-
-#if defined (HAVE__EXPF) && ! defined (HAVE_EXPF)
-# define HAVE_EXPF 1
-# define expf _expf
-#endif
-
-#if defined (HAVE__EXPL) && ! defined (HAVE_EXPL)
-# define HAVE_EXPL 1
-# define expl _expl
-#endif
-
-#if defined (HAVE__FABSF) && ! defined (HAVE_FABSF)
-# define HAVE_FABSF 1
-# define fabsf _fabsf
-#endif
-
-#if defined (HAVE__FABSL) && ! defined (HAVE_FABSL)
-# define HAVE_FABSL 1
-# define fabsl _fabsl
-#endif
-
-#if defined (HAVE__FINITE) && ! defined (HAVE_FINITE)
-# define HAVE_FINITE 1
-# define finite _finite
-#endif
-
-#if defined (HAVE__FINITEF) && ! defined (HAVE_FINITEF)
-# define HAVE_FINITEF 1
-# define finitef _finitef
-#endif
-
-#if defined (HAVE__FINITEL) && ! defined (HAVE_FINITEL)
-# define HAVE_FINITEL 1
-# define finitel _finitel
-#endif
-
-#if defined (HAVE__FLOORF) && ! defined (HAVE_FLOORF)
-# define HAVE_FLOORF 1
-# define floorf _floorf
-#endif
-
-#if defined (HAVE__FLOORL) && ! defined (HAVE_FLOORL)
-# define HAVE_FLOORL 1
-# define floorl _floorl
-#endif
-
-#if defined (HAVE__FMODF) && ! defined (HAVE_FMODF)
-# define HAVE_FMODF 1
-# define fmodf _fmodf
-#endif
-
-#if defined (HAVE__FMODL) && ! defined (HAVE_FMODL)
-# define HAVE_FMODL 1
-# define fmodl _fmodl
-#endif
-
-#if defined (HAVE__FPCLASS) && ! defined (HAVE_FPCLASS)
-# define HAVE_FPCLASS 1
-# define fpclass _fpclass
-#endif
-
-#if defined (HAVE__FREXPF) && ! defined (HAVE_FREXPF)
-# define HAVE_FREXPF 1
-# define frexpf _frexpf
-#endif
-
-#if defined (HAVE__FREXPL) && ! defined (HAVE_FREXPL)
-# define HAVE_FREXPL 1
-# define frexpl _frexpl
-#endif
-
-#if defined (HAVE__HYPOT) && ! defined (HAVE_HYPOT)
-# define HAVE_HYPOT 1
-# define hypot _hypot
-#endif
-
-#if defined (HAVE__HYPOTF) && ! defined (HAVE_HYPOTF)
-# define HAVE_HYPOTF 1
-# define hypotf _hypotf
-#endif
-
-#if defined (HAVE__HYPOTL) && ! defined (HAVE_HYPOTL)
-# define HAVE_HYPOTL 1
-# define hypotl _hypotl
-#endif
-
-#if defined (HAVE__ISINF) && ! defined (HAVE_ISINF)
-# define HAVE_ISINF 1
-# define isinf _isinf
-#endif
-
-#if defined (HAVE__ISINFF) && ! defined (HAVE_ISINFF)
-# define HAVE_ISINFF 1
-# define isinff _isinff
-#endif
-
-#if defined (HAVE__ISINFL) && ! defined (HAVE_ISINFL)
-# define HAVE_ISINFL 1
-# define isinfl _isinfl
-#endif
-
-#if defined (HAVE__ISNAN) && ! defined (HAVE_ISNAN)
-# define HAVE_ISNAN 1
-# define isnan _isnan
-#endif
-
-#if defined (HAVE__ISNANF) && ! defined (HAVE_ISNANF)
-# define HAVE_ISNANF 1
-# define isnanf _isnanf
-#endif
-
-#if defined (HAVE__ISNANL) && ! defined (HAVE_ISNANL)
-# define HAVE_ISNANL 1
-# define isnanl _isnanl
-#endif
-
-#if defined (HAVE__LDEXPF) && ! defined (HAVE_LDEXPF)
-# define HAVE_LDEXPF 1
-# define ldexpf _ldexpf
-#endif
-
-#if defined (HAVE__LDEXPL) && ! defined (HAVE_LDEXPL)
-# define HAVE_LDEXPL 1
-# define ldexpl _ldexpl
-#endif
-
-#if defined (HAVE__LOG10F) && ! defined (HAVE_LOG10F)
-# define HAVE_LOG10F 1
-# define log10f _log10f
-#endif
-
-#if defined (HAVE__LOG10L) && ! defined (HAVE_LOG10L)
-# define HAVE_LOG10L 1
-# define log10l _log10l
-#endif
-
-#if defined (HAVE__LOGF) && ! defined (HAVE_LOGF)
-# define HAVE_LOGF 1
-# define logf _logf
-#endif
-
-#if defined (HAVE__LOGL) && ! defined (HAVE_LOGL)
-# define HAVE_LOGL 1
-# define logl _logl
-#endif
-
-#if defined (HAVE__MODF) && ! defined (HAVE_MODF)
-# define HAVE_MODF 1
-# define modf _modf
-#endif
-
-#if defined (HAVE__MODFF) && ! defined (HAVE_MODFF)
-# define HAVE_MODFF 1
-# define modff _modff
-#endif
-
-#if defined (HAVE__MODFL) && ! defined (HAVE_MODFL)
-# define HAVE_MODFL 1
-# define modfl _modfl
-#endif
-
-#if defined (HAVE__POWF) && ! defined (HAVE_POWF)
-# define HAVE_POWF 1
-# define powf _powf
-#endif
-
-#if defined (HAVE__POWL) && ! defined (HAVE_POWL)
-# define HAVE_POWL 1
-# define powl _powl
-#endif
-
-#if defined (HAVE__QFPCLASS) && ! defined (HAVE_QFPCLASS)
-# define HAVE_QFPCLASS 1
-# define qfpclass _qfpclass
-#endif
-
-#if defined (HAVE__SINCOS) && ! defined (HAVE_SINCOS)
-# define HAVE_SINCOS 1
-# define sincos _sincos
-#endif
-
-#if defined (HAVE__SINCOSF) && ! defined (HAVE_SINCOSF)
-# define HAVE_SINCOSF 1
-# define sincosf _sincosf
-#endif
-
-#if defined (HAVE__SINCOSL) && ! defined (HAVE_SINCOSL)
-# define HAVE_SINCOSL 1
-# define sincosl _sincosl
-#endif
-
-#if defined (HAVE__SINF) && ! defined (HAVE_SINF)
-# define HAVE_SINF 1
-# define sinf _sinf
-#endif
-
-#if defined (HAVE__SINHF) && ! defined (HAVE_SINHF)
-# define HAVE_SINHF 1
-# define sinhf _sinhf
-#endif
-
-#if defined (HAVE__SINHL) && ! defined (HAVE_SINHL)
-# define HAVE_SINHL 1
-# define sinhl _sinhl
-#endif
-
-#if defined (HAVE__SINL) && ! defined (HAVE_SINL)
-# define HAVE_SINL 1
-# define sinl _sinl
-#endif
-
-#if defined (HAVE__SQRTF) && ! defined (HAVE_SQRTF)
-# define HAVE_SQRTF 1
-# define sqrtf _sqrtf
-#endif
-
-#if defined (HAVE__SQRTL) && ! defined (HAVE_SQRTL)
-# define HAVE_SQRTL 1
-# define sqrtl _sqrtl
-#endif
-
-#if defined (HAVE__STRTOF) && ! defined (HAVE_STRTOF)
-# define HAVE_STRTOF 1
-# define strtof _strtof
-#endif
-
-#if defined (HAVE__STRTOLD) && ! defined (HAVE_STRTOLD)
-# define HAVE_STRTOLD 1
-# define strtold _strtold
-#endif
-
-#if defined (HAVE__TANF) && ! defined (HAVE_TANF)
-# define HAVE_TANF 1
-# define tanf _tanf
-#endif
-
-#if defined (HAVE__TANHF) && ! defined (HAVE_TANHF)
-# define HAVE_TANHF 1
-# define tanhf _tanhf
-#endif
-
-#if defined (HAVE__TANHL) && ! defined (HAVE_TANHL)
-# define HAVE_TANHL 1
-# define tanhl _tanhl
-#endif
-
-#if defined (HAVE__TANL) && ! defined (HAVE_TANL)
-# define HAVE_TANL 1
-# define tanl _tanl
-#endif