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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/46625] New: libquadmath: Mangle internal symbols; rename __float128 <-> string functions
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46625

           Summary: libquadmath: Mangle internal symbols; rename
                    __float128 <-> string functions
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: burnus@gcc.gnu.org


For libquadmath.a it makes sense to mangle non-exported symbols, e.g. by
prefixing them with __quadmath_

quadmath_strtopQ and quadmath_dtoaq look ugly, Jakub suggests:
   quadmath_strtoq and quadmath_qtostr


C example (to have one somewhere):

/* Compile with  gcc test.c -lquadmath -lm  shows:
:+1.41421356237309504880e+00:
:+1.2345678000e-05:
*/

#include <quadmath.h>
#include <stdio.h>

int main()
{
  __float128 r;
  char str[200];

  r = 2.0q;
  r = sqrtq(r);
  quadmath_dtoaq (str, 200, 20, r);
  printf(":%s:\n", str);

  quadmath_strtopQ ("1.2345678", NULL, &r);
  r = r/100000.0q;
  quadmath_dtoaq (str, 200, 10, r);
  printf(":%s:\n", str);

  return 0;
}