configure: Add `-funwind-tables`

Certain platforms( ARM comes to mind ) in order
to get a proper stack trace on crash you need
to compile with this value.  Since it only
slightly increases the size of the binary for
other platforms, I would consider it worthwhile
to include this directive.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

diff --git a/configure.ac b/configure.ac
index ec0419048558e53076be77960bb74390c3598fbd..f6f38b47cf1d865ff37ae4d59fcd4c9427e4962d 100755 (executable)
--- a/configure.ac
+++ b/configure.ac
@@ -195,6 +195,7 @@ fi
 
 dnl always want these CFLAGS
 AC_C_FLAG([-fno-omit-frame-pointer])
+AC_C_FLAG([-funwind-tables])
 AC_C_FLAG([-Wall])
 AC_C_FLAG([-Wextra])
 AC_C_FLAG([-Wmissing-prototypes])