Re: 4.1.0 configure problem re kind 10 for cygwin

[Tim Prince <tprince at myrealbox dot com>]

FX Coudert wrote:
>  > Then, libgfortran attempts to build the
>
> > selected_real_kinds.f90 with kind 10 included, but fails.
>
>
> We'd need the exact error message for that. As well as the kinds.h file.
After installing gcc-4.1, it is possible to build libgfortran without 
optimization, without running into the kind 10 failure.  kinds.h attached.
Apparently, when bootstrapping with an earlier version of gcc, that gcc 
is used to build libgfortran.  I was bootstrapping with 4.0.3.
Does testsuite still test the installed libgfortran, rather than the one 
which has just been built?

> > but there is no C library support for it in Cygwin, and both the 
> > libstdc++ and libgfortran configure scripts appear to figure that out OK.
>
>
> You mean all the long double math functions are not available?
That's correct, the math library (newlib) used by Cygwin does not 
support long double math, not even by substituting double functions. 
Except that libstdc++ does call the double math functions in its long 
double library.
Long double I/O is a relatively recent addition to newlib.

Is it convenient to set up the libfortran Makefile to build selected 
files with or without optimization, in order to work around the ICE 
failures of gcc-4.1?
typedef int8_t GFC_INTEGER_1;
typedef uint8_t GFC_UINTEGER_1;
typedef GFC_INTEGER_1 GFC_LOGICAL_1;
#define HAVE_GFC_LOGICAL_1
#define HAVE_GFC_INTEGER_1
typedef int16_t GFC_INTEGER_2;
typedef uint16_t GFC_UINTEGER_2;
typedef GFC_INTEGER_2 GFC_LOGICAL_2;
#define HAVE_GFC_LOGICAL_2
#define HAVE_GFC_INTEGER_2
typedef int32_t GFC_INTEGER_4;
typedef uint32_t GFC_UINTEGER_4;
typedef GFC_INTEGER_4 GFC_LOGICAL_4;
#define HAVE_GFC_LOGICAL_4
#define HAVE_GFC_INTEGER_4
typedef int64_t GFC_INTEGER_8;
typedef uint64_t GFC_UINTEGER_8;
typedef GFC_INTEGER_8 GFC_LOGICAL_8;
#define HAVE_GFC_LOGICAL_8
#define HAVE_GFC_INTEGER_8
#define GFC_INTEGER_LARGEST GFC_INTEGER_8
#define GFC_UINTEGER_LARGEST GFC_UINTEGER_8

typedef float GFC_REAL_4;
typedef complex float GFC_COMPLEX_4;
#define HAVE_GFC_REAL_4
#define HAVE_GFC_COMPLEX_4
typedef double GFC_REAL_8;
typedef complex double GFC_COMPLEX_8;
#define HAVE_GFC_REAL_8
#define HAVE_GFC_COMPLEX_8
typedef long double GFC_REAL_10;
typedef complex long double GFC_COMPLEX_10;
#define HAVE_GFC_REAL_10
#define HAVE_GFC_COMPLEX_10
#define GFC_REAL_LARGEST_FORMAT "L"
#define GFC_REAL_LARGEST long double