libstdc++: Make --enable-libstdcxx-backtrace=auto default to yes

This causes libstdc++_libbacktrace.a to be built by default. This might
fail on some targets, in which case we can make the 'auto' choice expand
to either 'yes' or 'no' depending on the target.

libstdc++-v3/ChangeLog:

	* acinclude.m4 (GLIBCXX_ENABLE_BACKTRACE): Default to yes.
	* configure: Regenerate.

diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index b25378eaacec93bddc56074231cdb6991460b4da..50c808c6b2d6db5c1970fcf950f21dea9a8ebd9b 100644 (file)
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -5481,7 +5481,7 @@ BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DBACKTRACE_ELF_SIZE=$elfsize"
 
   AC_MSG_CHECKING([whether to build libbacktrace support])
   if test "$enable_libstdcxx_backtrace" = "auto"; then
-    enable_libstdcxx_backtrace=no
+    enable_libstdcxx_backtrace=yes
   fi
   AC_MSG_RESULT($enable_libstdcxx_backtrace)
   if test "$enable_libstdcxx_backtrace" = "yes"; then

diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index c4da56c3042f5411e0fdce9ca98107f7928b3cec..db1932300c0103161ba1503fc5799a73c3ff9032 100755 (executable)
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -73156,7 +73156,7 @@ BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DBACKTRACE_ELF_SIZE=$elfsize"
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build libbacktrace support" >&5
 $as_echo_n "checking whether to build libbacktrace support... " >&6; }
   if test "$enable_libstdcxx_backtrace" = "auto"; then
-    enable_libstdcxx_backtrace=no
+    enable_libstdcxx_backtrace=yes
   fi
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_libstdcxx_backtrace" >&5
 $as_echo "$enable_libstdcxx_backtrace" >&6; }