Set EXPORT_LIBRARY=1 in all pertinent Makefile.ins. Allows us to build the final link list as we traverse the tree. Bug #46775

docshell/shistory/src/Makefile.in

@@ -28,6 +28,7 @@ include $(DEPTH)/config/autoconf.mk
 
 MODULE		= shistory
 LIBRARY_NAME	= shistory
+EXPORT_LIBRARY = 1
 IS_COMPONENT	= 1
 REQUIRES	= xpcom string necko dom layout docshell locale widget uriloader pref gfx2