strtold() availability

Václav Zeman vhaisman@gmail.com
Fri Mar 7 18:08:00 GMT 2014


Hi.

This bit from /usr/include/stdlib.h hides the `strtold()` function
even though the `strtold` symbol appears to be exported from
`cygwin1.dll`:

~~~~{.c}
/* On platforms where long double equals double.  */
#ifdef _LDBL_EQ_DBL
#if !defined(__STRICT_ANSI__) || (__STDC_VERSION__ >= 199901L) ||
(__cplusplus >= 201103L)
extern long double strtold (const char *__restrict, char **__restrict);
#endif
#endif /* _LDBL_EQ_DBL */
~~~~

This in turn breaks my source because I cannot use `_GLIBCXX_USE_C99`
to expose some C++11 features like `std::vsnprintf()`.

Shouldn't the `_LDBL_EQ_DBL` guard be removed and the function exposed
regardless of `double` and `long double` sizes?

-- 
VZ

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