From: Michael Meissner <meissner@linux.ibm.com>
Date: Fri, 30 Oct 2020 22:36:25 +0000 (-0400)
Subject: PowerPC: Don't assume all targets have GLIBC.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f03851e1a6dac72127e97629e259ad01a2b1e7b6;p=gcc.git

PowerPC: Don't assume all targets have GLIBC.

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.
---

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index bcd4c4a82b3..1e506b83762 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -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)