libstdc++: Add missing functions to <cmath> [PR79700]

This patch adds the -f and -l variants of the C99 <math.h> functions to
<cmath> under namespace std (so std::sqrtf, std::fabsl, etc.) for C++11
and up.

libstdc++-v3/ChangeLog:

	PR libstdc++/79700
	* include/c_global/cmath (acosf, acosl, asinf, asinl, atanf)
	(atanl, atan2f, atan2l, ceilf, ceill, cosf, cosl, coshf, coshl)
	(expf, expl, fabsf, fabsl, floorf, floorl, fmodf, fmodl, frexpf)
	(frexpl, ldexpf, ldexpl, logf, logl, log10f, log10l, modff)
	(modfl, powf, powl, sinf, sinl, sinhf, sinhl, sqrtf, sqrtl, tanf)
	(tanl, tanhf, tanhl): Add using-declarations in namespace std.
	* testsuite/26_numerics/headers/cmath/equivalent_functions.cc:
	New test.
	* testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
	Add checks for existence of above names.

Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com>
Reviewed-by: Jonathan Wakely <jwakely@redhat.com>

1 files changed, 199 insertions, 0 deletions

diff --git a/libstdc++-v3/include/c_global/cmath b/libstdc++-v3/include/c_global/cmath
index 6461c92..ecf574f 100644
--- a/libstdc++-v3/include/c_global/cmath
+++ b/libstdc++-v3/include/c_global/cmath
@@ -1771,6 +1771,205 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
 #if __cplusplus >= 201103L
 
+#undef acosf
+#undef acosl
+#undef asinf
+#undef asinl
+#undef atanf
+#undef atanl
+#undef atan2f
+#undef atan2l
+#undef ceilf
+#undef ceill
+#undef cosf
+#undef cosl
+#undef coshf
+#undef coshl
+#undef expf
+#undef expl
+#undef fabsf
+#undef fabsl
+#undef floorf
+#undef floorl
+#undef fmodf
+#undef fmodl
+#undef frexpf
+#undef frexpl
+#undef ldexpf
+#undef ldexpl
+#undef logf
+#undef logl
+#undef log10f
+#undef log10l
+#undef modff
+#undef modfl
+#undef powf
+#undef powl
+#undef sinf
+#undef sinl
+#undef sinhf
+#undef sinhl
+#undef sqrtf
+#undef sqrtl
+#undef tanf
+#undef tanl
+#undef tanhf
+#undef tanhl
+
+#ifdef _GLIBCXX_HAVE_ACOSF
+  using ::acosf;
+#endif
+#ifdef _GLIBCXX_HAVE_ACOSL
+  using ::acosl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_ASINF
+  using ::asinf;
+#endif
+#ifdef _GLIBCXX_HAVE_ASINL
+  using ::asinl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_ATANF
+  using ::atanf;
+#endif
+#ifdef _GLIBCXX_HAVE_ATANL
+  using ::atanl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_ATAN2F
+  using ::atan2f;
+#endif
+#ifdef _GLIBCXX_HAVE_ATAN2L
+  using ::atan2l;
+#endif
+
+#ifdef _GLIBCXX_HAVE_CEILF
+  using ::ceilf;
+#endif
+#ifdef _GLIBCXX_HAVE_CEILL
+  using ::ceill;
+#endif
+
+#ifdef _GLIBCXX_HAVE_COSF
+  using ::cosf;
+#endif
+#ifdef _GLIBCXX_HAVE_COSL
+  using ::cosl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_COSHF
+  using ::coshf;
+#endif
+#ifdef _GLIBCXX_HAVE_COSHL
+  using ::coshl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_EXPF
+  using ::expf;
+#endif
+#ifdef _GLIBCXX_HAVE_EXPL
+  using ::expl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_FABSF
+  using ::fabsf;
+#endif
+#ifdef _GLIBCXX_HAVE_FABSL
+  using ::fabsl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_FLOORF
+  using ::floorf;
+#endif
+#ifdef _GLIBCXX_HAVE_FLOORL
+  using ::floorl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_FMODF
+  using ::fmodf;
+#endif
+#ifdef _GLIBCXX_HAVE_FMODL
+  using ::fmodl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_FREXPF
+  using ::frexpf;
+#endif
+#ifdef _GLIBCXX_HAVE_FREXPL
+  using ::frexpl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_LDEXPF
+  using ::ldexpf;
+#endif
+#ifdef _GLIBCXX_HAVE_LDEXPL
+  using ::ldexpl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_LOGF
+  using ::logf;
+#endif
+#ifdef _GLIBCXX_HAVE_LOGL
+  using ::logl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_LOG10F
+  using ::log10f;
+#endif
+#ifdef _GLIBCXX_HAVE_LOG10L
+  using ::log10l;
+#endif
+
+#ifdef _GLIBCXX_HAVE_MODFF
+  using ::modff;
+#endif
+#ifdef _GLIBCXX_HAVE_MODFL
+  using ::modfl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_POWF
+  using ::powf;
+#endif
+#ifdef _GLIBCXX_HAVE_POWL
+  using ::powl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_SINF
+  using ::sinf;
+#endif
+#ifdef _GLIBCXX_HAVE_SINL
+  using ::sinl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_SINHF
+  using ::sinhf;
+#endif
+#ifdef _GLIBCXX_HAVE_SINHL
+  using ::sinhl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_SQRTF
+  using ::sqrtf;
+#endif
+#ifdef _GLIBCXX_HAVE_SQRTL
+  using ::sqrtl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_TANF
+  using ::tanf;
+#endif
+#ifdef _GLIBCXX_HAVE_TANL
+  using ::tanl;
+#endif
+
+#ifdef _GLIBCXX_HAVE_TANHF
+  using ::tanhf;
+#endif
+#ifdef _GLIBCXX_HAVE_TANHL
+  using ::tanhl;
+#endif
+
 #ifdef _GLIBCXX_USE_C99_MATH_FUNCS
 
 #undef acosh