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[build] Use __cxa_atexit on Solaris 12+

Message ID yddpp2a5me1.fsf@lokon.CeBiTec.Uni-Bielefeld.DE
State New
Headers show

Commit Message

Rainer Orth Aug. 26, 2015, 11:17 a.m. UTC 
Solaris 12 introduced __cxa_atexit in libc.  The following patch makes
use of it, and also removes the strange failures seen with gld reported
in PR c++/51923.

Bootstrapped without regressions on i386-pc-solaris2.1[12] and
sparc-sun-solaris2.1[12], will installl on mainline.  Will backport to
the gcc 5 branch after some soak time.

	Rainer


2015-02-10  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

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

Use __cxa_atexit on Solaris 10+

diff --git a/gcc/config.gcc b/gcc/config.gcc
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -820,6 +820,12 @@  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}"