| From: Werner Fink | Date: Mon, 14 Mar 2016 14:20:51 +0000 | | Is this wrong value of LDBL_MAX still valid got gcc > 4 | Compare with | https://lists.gnu.org/archive/html/bug-gnulib/2016-01/msg00011.html | --- gl/lib/float.in.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- gl/lib/float.in.h +++ gl/lib/float.in.h 2016-03-14 14:15:45.616871084 +0000 @@ -112,21 +112,21 @@ extern const union gl_long_double_union wrong. On Linux/PowerPC with gcc 4.4, the value of LDBL_MAX is wrong. */ #if (defined _ARCH_PPC || defined _POWER) && defined _AIX && (LDBL_MANT_DIG == 106) && defined __GNUC__ # undef LDBL_MIN_EXP # define LDBL_MIN_EXP DBL_MIN_EXP # undef LDBL_MIN_10_EXP # define LDBL_MIN_10_EXP DBL_MIN_10_EXP # undef LDBL_MIN # define LDBL_MIN 2.22507385850720138309023271733240406422e-308L /* DBL_MIN = 2^-1022 */ #endif -#if (defined _ARCH_PPC || defined _POWER) && (defined _AIX || defined __linux__) && (LDBL_MANT_DIG == 106) && defined __GNUC__ +#if (defined _ARCH_PPC || defined _POWER) && (defined _AIX || defined __linux__) && (LDBL_MANT_DIG == 106) && (defined(__GNUC__) && (__GNUC__ == 4 && __GNUC_MINOR__ == 4)) # undef LDBL_MAX /* LDBL_MAX is represented as { 0x7FEFFFFF, 0xFFFFFFFF, 0x7C8FFFFF, 0xFFFFFFFF }. It is not easy to define: #define LDBL_MAX 1.79769313486231580793728971405302307166e308L is too small, whereas #define LDBL_MAX 1.79769313486231580793728971405302307167e308L is too large. Apparently a bug in GCC decimal-to-binary conversion. Also, I can't get values larger than #define LDBL63 ((long double) (1ULL << 63)) #define LDBL882 (LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63 * LDBL63)