Use __cxa_atexit on Solaris 12+

	* config.gcc (*-*-solaris2*): Enable default_use_cxa_atexit on
	Solaris 12+.

From-SVN: r227255

gcc/ChangeLog

+2015-08-27  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* config.gcc (*-*-solaris2*): Enable default_use_cxa_atexit on
+	Solaris 12+.
+
 2015-08-27  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
 	    Andre Vieira  <andre.simoesdiasvieira@arm.com>
 

gcc/config.gcc

@@ -835,6 +835,12 @@ case ${target} in
   sol2_tm_file_head="dbxelf.h elfos.h ${cpu_type}/sysv4.h"
   sol2_tm_file_tail="${cpu_type}/sol2.h sol2.h"
   sol2_tm_file="${sol2_tm_file_head} ${sol2_tm_file_tail}"
+  case ${target} in
+    *-*-solaris2.1[2-9]*)
+      # __cxa_atexit was introduced in Solaris 12.
+      default_use_cxa_atexit=yes
+      ;;
+  esac
   use_gcc_stdint=wrap
   if test x$gnu_ld = xyes; then
     tm_file="usegld.h ${tm_file}"