https://bugs.gentoo.org/707188
--- a/src/cfg.c
+++ b/src/cfg.c
@@ -22,6 +22,7 @@
 #include <string.h>
 #endif
 
+extern char *LPE_CONFIG_FILE;
 int cfg_errno;
 
 void
--- a/src/lpe.c
+++ b/src/lpe.c
@@ -25,6 +25,7 @@
 #include "strfuncs.h"
 #include "exports.h"
 
+char *LPE_CONFIG_FILE;
 /* A flag indicating a desire to quit the editor.  This is set whenever a
  * command should cause an exit.
  */
--- a/src/options.h
+++ b/src/options.h
@@ -38,6 +38,6 @@
 /*
  * Other things that are used in some places...
  */
-char *LPE_CONFIG_FILE;
+extern char *LPE_CONFIG_FILE;
 
 #endif /* LPE_OPTIONS_H */