| # Copyright (C) 2002-2004, 2006-2018 Free Software Foundation, Inc. |
| # This file is free software; the Free Software Foundation |
| # gives unlimited permission to copy and/or distribute it, |
| # with or without modifications, as long as this notice is preserved. |
| |
| # gl_LONG_DOUBLE_VS_DOUBLE |
| # determines whether 'long double' and 'double' have the same representation. |
| # The currently known platforms where this is the case are: |
| # Linux/HPPA, Minix 3.1.8, AIX 5, AIX 6 and 7 with xlc, MSVC 9. |
| |
| long_double_eq_double_test = ''' |
| #include <float.h> |
| int main () |
| { |
| typedef int check[sizeof (long double) == sizeof (double) |
| && LDBL_MANT_DIG == DBL_MANT_DIG |
| && LDBL_MAX_EXP == DBL_MAX_EXP |
| && LDBL_MIN_EXP == DBL_MIN_EXP |
| ? 1 : -1]; |
| return check; |
| } |
| ''' |
| |
| gl_cv_long_double_equals_double = cc.compiles(long_double_eq_double_test) |
