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PowerPC: Don't assume all targets have GLIBC.

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gcc/
2020-10-30  Michael Meissner  <meissner@linux.ibm.com>

	* config/rs6000/rs6000.c (glibc_supports_ieee_128bit): New helper
	function.
	(rs6000_option_override_internal): Call it.
This commit is contained in:
Michael Meissner 2020-10-30 18:36:25 -04:00
parent a1343e5c74
commit f03851e1a6
1 changed files with 16 additions and 3 deletions
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19
gcc/config/rs6000/rs6000.c
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@ -3539,6 +3539,20 @@ rs6000_linux64_override_options ()
}
#endif
/* Return true if we are using GLIBC, and it supports IEEE 128-bit long double.
This support is only in little endian GLIBC 2.32 or newer. */
static bool
glibc_supports_ieee_128bit (void)
{
#ifdef OPTION_GLIBC
if (OPTION_GLIBC && !BYTES_BIG_ENDIAN
&& ((TARGET_GLIBC_MAJOR * 1000) + TARGET_GLIBC_MINOR) >= 2032)
return true;
#endif /* OPTION_GLIBC. */
return false;
}
/* Override command line options.
Combine build-specific configuration information with options
@ -4164,9 +4178,8 @@ rs6000_option_override_internal (bool global_init_p)
static bool warned_change_long_double;
if (!warned_change_long_double
&& (!OPTION_GLIBC
|| (!lang_GNU_C () && !lang_GNU_CXX ())
|| ((TARGET_GLIBC_MAJOR * 1000) + TARGET_GLIBC_MINOR) < 2032))
&& (!glibc_supports_ieee_128bit ()
|| (!lang_GNU_C () && !lang_GNU_CXX ())))
{
warned_change_long_double = true;
if (TARGET_IEEEQUAD)