Give a warning when system boost and stdlib-debug are used together

In general this would lead to an immediate runtime crash because the
runtime checks of libstdc++ change the layout of some STL objects.
Therefore, this will only work when the boost libraries have been
compiled with this same flag. At this time, it is not known whether
any linux distribution contains such libraries.

Fixes bug #9736.

INSTALL

@@ -222,7 +222,11 @@ The following options allow you to tweak the generated code more precisely (see
 
   o --enable-stdlib-debug adds some debug code in the standard
     library; this slows down the code, but has been helpful in the
-    past to find bugs.
+    past to find bugs. Note that this is in general incompatible with
+    the system boost library (which is used when
+    --without-included-boost is specified). You may have to use
+    --disable-stdlib-debug when linking development versions against
+    your system's boost library.
 
   o --enable-concept-checks adds some compile-time checks. There is no
     run-time penalty.

config/lyxinclude.m4

@@ -360,6 +360,15 @@ AC_DEFUN([LYX_USE_INCLUDED_BOOST],[
 			fi
 		fi
 		AC_SUBST(BOOST_MT)
+
+		dnl In general, system boost libraries are incompatible with
+		dnl the use of stdlib-debug in libstdc++. See ticket #9736 for
+		dnl details.
+		if test $enable_stdlib_debug = "yes" ; then
+			LYX_WARNING([Compiling LyX with stdlib-debug and system boost libraries may lead to
+   crashes. Consider using --disable-stdlib-debug or removing
+   --without-included-boost.])
+		fi
 	fi
 ])
 

status.21x

@@ -113,3 +113,5 @@ What's new
 
 - Work around gcc 5 bug 67557.
 
+- Give a warning when system boost and stdlib-debug are used together
+  (bug 9736).