Merge branch 'master' into next

* master:
  Ensure CC/CXX are passed into bdlib.

build/autotools/configure.ac

@@ -278,6 +278,7 @@ if test -d .git; then
 fi
 ]
 
+export CC CXX
 if [[ -f lib/bdlib/configure ]]; then
   AC_CONFIG_SUBDIRS([lib/bdlib])
 fi

configure

@@ -8577,6 +8577,7 @@ if test -d .git; then
 fi
 
 
+export CC CXX
 if [ -f lib/bdlib/configure ]; then