[Bug libfortran/126305] Many gfortran tests fail due to excess errors on HP-UX (undefined asinl, atanl, atan2l, acosl)

[kargl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126305

--- Comment #18 from Steve Kargl <kargl at gcc dot gnu.org> ---
Comment on attachment 65108
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65108
Patch to provide additional long double math routines

I think this is fine with the following caveats.

In c99_protos.h, can you add a comment above the first
occurrence of the following idiom:

+#if (defined(USE_LIBQUADLIB) || defined(HAVE_ACOS)) && !defined(HAVE_ACOSL)

Something, like 

/*  On HPUX, some long double functions are mapped to functions in
    libquadmath, e.g., acosl(x) maps to acosq((__float128)x).  */

This makes it clear to a future reader that some special handling is
occurring.

In libgfortran/configure, the arithmetic has changed:

-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) <<
31))

why?  Yes, I know configure is a generated file.  Are your autotools
at the correct version?


In c99_functions.c, can you repeat the comment from c99_protos.h
above the first occurence of

+#if (defined(USE_LIBQUADLIB) || defined(HAVE_ERF)) && !defined(HAVE_ERFL)


Finally, I notice that you are pulling in some fdlibm code with
the a Sun Microsystem license.  I don't know if this is considered
compatible with GPLv3 with library exception.  Can you check that this
is ok with a GCC maintainer?