+if test "$wxUSE_STACKWALKER" = "yes" -a "$wxUSE_UNIX" = "yes"; then
+
+
+ ac_ext=cc
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+
+ echo "$as_me:$LINENO: checking for backtrace() in <execinfo.h>" >&5
+echo $ECHO_N "checking for backtrace() in <execinfo.h>... $ECHO_C" >&6
+if test "${wx_cv_func_backtrace+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+ cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+#include <execinfo.h>
+int
+main ()
+{
+
+ void *trace[1];
+ char **messages;
+
+ backtrace(trace, 1);
+ messages = backtrace_symbols(trace, 1);
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>conftest.er1
+ ac_status=$?
+ grep -v '^ *+' conftest.er1 >conftest.err
+ rm -f conftest.er1
+ cat conftest.err >&5
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -z "$ac_cxx_werror_flag"
+ || test ! -s conftest.err'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ wx_cv_func_backtrace=yes
+else
+ echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+wx_cv_func_backtrace=no
+
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+
+
+fi
+echo "$as_me:$LINENO: result: $wx_cv_func_backtrace" >&5
+echo "${ECHO_T}$wx_cv_func_backtrace" >&6
+
+
+ if test "$wx_cv_func_backtrace" = "no"; then
+ { echo "$as_me:$LINENO: WARNING: backtrace() is not available, wxStackWalker will not be available" >&5
+echo "$as_me: WARNING: backtrace() is not available, wxStackWalker will not be available" >&2;}
+ wxUSE_STACKWALKER=no
+ else
+ echo "$as_me:$LINENO: checking for __cxa_demangle() in <cxxabi.h>" >&5
+echo $ECHO_N "checking for __cxa_demangle() in <cxxabi.h>... $ECHO_C" >&6
+if test "${wx_cv_func_cxa_demangle+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+ cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+#include <cxxabi.h>
+int
+main ()
+{
+
+ int rc;
+ __cxxabiv1::__cxa_demangle("foo", 0, 0, &rc);
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>conftest.er1
+ ac_status=$?
+ grep -v '^ *+' conftest.er1 >conftest.err
+ rm -f conftest.er1
+ cat conftest.err >&5
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -z "$ac_cxx_werror_flag"
+ || test ! -s conftest.err'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ wx_cv_func_cxa_demangle=yes
+else
+ echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+wx_cv_func_cxa_demangle=no
+
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+
+
+fi
+echo "$as_me:$LINENO: result: $wx_cv_func_cxa_demangle" >&5
+echo "${ECHO_T}$wx_cv_func_cxa_demangle" >&6
+
+ if test "$wx_cv_func_cxa_demangle" = "yes"; then
+ cat >>confdefs.h <<\_ACEOF
+#define HAVE_CXA_DEMANGLE 1
+_ACEOF
+
+ fi
+ fi
+
+ ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+fi
+