Auto merge of #24679 - tamird:enable-debug, r=pnkfelix

r? @alexcrichton

Author: bors

configure

@@ -659,9 +659,10 @@ if [ -n "$CFG_ENABLE_DEBUG" ]; then
         CFG_DISABLE_OPTIMIZE=1
         CFG_DISABLE_OPTIMIZE_CXX=1
     fi
-    CFG_ENABLE_LLVM_ASSERTIONS=1
     CFG_ENABLE_DEBUG_ASSERTIONS=1
     CFG_ENABLE_DEBUG_JEMALLOC=1
+    CFG_ENABLE_DEBUGINFO=1
+    CFG_ENABLE_LLVM_ASSERTIONS=1
 fi
 
 # OK, now write the debugging options