https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86599
--- Comment #10 from The Written Word <bugzilla-gcc at thewrittenword dot com>
---
(In reply to John David Anglin from comment #9)
> It would help to see the uses of long_double in stdlib.h.
/usr/include/stdlib.h has:
# ifndef _LONG_DOUBLE
# define _LONG_DOUBLE
# if !defined(__ia64) || !defined(_PROTOTYPES) || defined(_LONG_DOUBLE_STRUCT)
typedef struct {
uint32_t word1, word2, word3, word4;
} long_double;
extern long_double strtold __((const char * __restrict, char ** __restrict));
# else /* !__ia64 || !_PROTOTYPES || _LONG_DOUBLE_STRUCT */
# ifdef _INCLUDE_HPUX_SOURCE
typedef long double long_double;
# endif /* _INCLUDE_HPUX_SOURCE */
extern long double strtold __((const char * __restrict, char ** __restrict));
# endif /* !__ia64 ||!_PROTOTYPES ||_LONG_DOUBLE_STRUCT */
#endif /* _LONG_DOUBLE */
