re PR target/27880 (undefined reference to `_Unwind_GetIPInfo')

	PR  target/27880
	* config/unwind_ipinfo.m4 (GCC_CHECK_UNWIND_GETIPINFO): Change from
	link test to target based test.
	* libstdc++/v3/configure.ac: Move call to GCC_CHECK_UNWIND_GETIPINFO.
	* libstdc++/v3/configure: Regenerate.
	* libjava/configure: Regenerate.

From-SVN: r141804

config/ChangeLog

+2008-11-12  Steve Ellcey  <sje@cup.hp.com>
+
+	PR target/27880
+	* unwind_ipinfo.m4 (GCC_CHECK_UNWIND_GETIPINFO): Change from
+	link test to target based test.
+
 2008-08-09  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	* mt-mips16-compat: New file, taken from mt-mips-elfoabi.

config/unwind_ipinfo.m4

 dnl
-dnl Check whether _Unwind_GetIPInfo is available.
+dnl Check whether _Unwind_GetIPInfo is available without doing a link
+dnl test so we can use this with libstdc++-v3 and libjava.  Need to
+dnl use $target to set defaults because automatic checking is not possible
+dnl without a link test (and maybe even with a link test).
 dnl
+
 AC_DEFUN([GCC_CHECK_UNWIND_GETIPINFO], [
-  AC_LANG_SAVE
-  AC_LANG_CPLUSPLUS
-  ac_save_CXXFLAGS="$CXXFLAGS"
-  CXXFLAGS="$CXXFLAGS -fno-exceptions"
-  AC_MSG_CHECKING([for _Unwind_GetIPInfo])
-  AC_CACHE_VAL(gcc_cv_getipinfo, [
-  AC_TRY_LINK([extern "C" { extern void _Unwind_GetIPInfo(); }],
-      [_Unwind_GetIPInfo();],
-      [gcc_cv_getipinfo=yes],
-      [gcc_cv_getipinfo=no])
-  ])
-  if test $gcc_cv_getipinfo = yes; then
+  AC_ARG_WITH(system-libunwind,
+  [  --with-system-libunwind use installed libunwind])
+  # If system-libunwind was not specifically set, pick a default setting.
+  if test x$with_system_libunwind = x; then
+    case ${target} in
+      ia64-*-hpux*) with_system_libunwind=yes ;;
+      *) with_system_libunwind=no ;;
+    esac
+  fi
+  # Based on system-libunwind and target, do we have ipinfo?
+  if  test x$with_system_libunwind = xyes; then
+    case ${target} in
+      ia64-*-*) have_unwind_getipinfo=no ;;
+      *) have_unwind_getipinfo=yes ;;
+    esac
+  else
+     have_unwind_getipinfo=yes
+  fi
+
+  if test x$have_unwind_getipinfo = xyes; then
     AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.])
   fi
-  AC_MSG_RESULT($gcc_cv_getipinfo)
-  CXXFLAGS="$ac_save_CXXFLAGS"
-  AC_LANG_RESTORE
 ])

libjava/ChangeLog

+2008-11-12  Steve Ellcey  <sje@cup.hp.com>
+
+	* configure: Regenerate to get new GCC_CHECK_UNWIND_GETIPINFO.
+
 2008-11-12  Jakub Jelinek  <jakub@redhat.com>
 
 	PR libgcj/33764

libstdc++-v3/ChangeLog

+2008-11-12  Steve Ellcey  <sje@cup.hp.com>
+
+	* configure.ac: Move call to GCC_CHECK_UNWIND_GETIPINFO.
+	* configure: Regenerate to get new GCC_CHECK_UNWIND_GETIPINFO.
+
 2008-11-12  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR libstdc++/37986 (cont)

libstdc++-v3/configure.ac

@@ -182,9 +182,6 @@ if $GLIBCXX_IS_NATIVE; then
   # For TLS support.
   GCC_CHECK_TLS
 
-  # For _Unwind_GetIPInfo.
-  GCC_CHECK_UNWIND_GETIPINFO
-
   # For iconv support.
   AM_ICONV
 
@@ -286,11 +283,12 @@ else
     AC_DEFINE(HAVE_TANL)
     AC_DEFINE(HAVE_TANHL)
   fi
-
-  # Assume we have _Unwind_GetIPInfo for cross-compiles.
-  AC_DEFINE(HAVE_GETIPINFO)
 fi
 
+# Check for _Unwind_GetIPInfo.
+GCC_CHECK_UNWIND_GETIPINFO
+
+
 GCC_LINUX_FUTEX([AC_DEFINE(HAVE_LINUX_FUTEX, 1, [Define if futex syscall is available.])])
 
 GCC_HEADER_STDINT(include/gstdint.h)