diff -Naur wmpower-0.4.3.orig/src/dockapp/dockapp.c wmpower-0.4.3/src/dockapp/dockapp.c
--- wmpower-0.4.3.orig/src/dockapp/dockapp.c	2003-09-18 18:53:27.000000000 +0200
+++ wmpower-0.4.3/src/dockapp/dockapp.c	2020-01-29 19:15:58.062434728 +0100
@@ -50,6 +50,7 @@
 GC         NormalGC;
 XpmIcon    wmgen;
 Pixmap     pixmask;
+Display    *display;
 
   /*****************/
  /* Mouse Regions */
diff -Naur wmpower-0.4.3.orig/src/dockapp/dockapp.h wmpower-0.4.3/src/dockapp/dockapp.h
--- wmpower-0.4.3.orig/src/dockapp/dockapp.h	2003-09-18 18:29:17.000000000 +0200
+++ wmpower-0.4.3/src/dockapp/dockapp.h	2020-01-29 19:15:58.062434728 +0100
@@ -28,7 +28,7 @@
  /* Global variable */
 /*******************/
 
-Display		*display;
+extern Display		*display;
 
   /***********************/
  /* Function Prototypes */
diff -Naur wmpower-0.4.3.orig/src/power_management/acpi/libacpi.c wmpower-0.4.3/src/power_management/acpi/libacpi.c
--- wmpower-0.4.3.orig/src/power_management/acpi/libacpi.c	2005-09-06 12:09:10.000000000 +0200
+++ wmpower-0.4.3/src/power_management/acpi/libacpi.c	2020-01-29 19:20:44.031452047 +0100
@@ -46,6 +46,8 @@
 #include "power_management.h"
 #include "lib_utils.h"
 
+char battery_type;
+int batt_count;
 
 /* here we put temp stuff read from proc files */
 char buf[512];
diff -Naur wmpower-0.4.3.orig/src/power_management/acpi/libacpi.h wmpower-0.4.3/src/power_management/acpi/libacpi.h
--- wmpower-0.4.3.orig/src/power_management/acpi/libacpi.h	2004-07-16 20:13:19.000000000 +0200
+++ wmpower-0.4.3/src/power_management/acpi/libacpi.h	2020-01-29 19:20:48.717452334 +0100
@@ -67,7 +67,7 @@
 }
 ACPIinfo;
 
-char battery_type;
+extern char battery_type;
 
 typedef struct
 {
@@ -76,7 +76,7 @@
 ACADstate;
 
 /* number of batteries detected */
-int batt_count;
+extern int batt_count;
 
 int  check_acpi (void);
 void read_acad_state (ACADstate *acadstate);
diff -Naur wmpower-0.4.3.orig/src/power_management/compal/compal_lib.c wmpower-0.4.3/src/power_management/compal/compal_lib.c
--- wmpower-0.4.3.orig/src/power_management/compal/compal_lib.c	2005-09-12 18:13:32.000000000 +0200
+++ wmpower-0.4.3/src/power_management/compal/compal_lib.c	2020-01-29 19:21:14.455453915 +0100
@@ -40,6 +40,7 @@
 #include "lib_utils.h"
 #include "power_management.h"
 
+char  compal_model[COMPAL_MAX_MODEL_INFO];
 
 
 /* gets a value from a strtok-ed buffer; for reading from /proc */
diff -Naur wmpower-0.4.3.orig/src/power_management/compal/compal_lib.h wmpower-0.4.3/src/power_management/compal/compal_lib.h
--- wmpower-0.4.3.orig/src/power_management/compal/compal_lib.h	2005-09-12 18:13:23.000000000 +0200
+++ wmpower-0.4.3/src/power_management/compal/compal_lib.h	2020-01-29 19:21:09.180453591 +0100
@@ -44,7 +44,7 @@
 #define COMPAL_PROC_FILE_BATT	"/proc/omnibook/battery"
 
 
-char  compal_model[COMPAL_MAX_MODEL_INFO];
+extern char  compal_model[COMPAL_MAX_MODEL_INFO];
 
 char *getvaluefromhash (char *key, char *hash);
 
diff -Naur wmpower-0.4.3.orig/src/power_management/power_management.c wmpower-0.4.3/src/power_management/power_management.c
--- wmpower-0.4.3.orig/src/power_management/power_management.c	2005-12-15 12:54:59.000000000 +0100
+++ wmpower-0.4.3/src/power_management/power_management.c	2020-01-29 19:18:36.031444239 +0100
@@ -55,6 +55,13 @@
 int use_noflushd=1;
 int use_cpufreq=1;
 
+kernel_versions kernel_version;
+int minBrightness;
+int maxBrightness;
+int waittime; /* /proc polling time */
+char *cpufreq_online_governor;
+char *cpufreq_offline_governor;
+
 /* Battery to monitor */
 int Battery;
 
diff -Naur wmpower-0.4.3.orig/src/power_management/power_management.h wmpower-0.4.3/src/power_management/power_management.h
--- wmpower-0.4.3.orig/src/power_management/power_management.h	2005-12-15 12:54:12.000000000 +0100
+++ wmpower-0.4.3/src/power_management/power_management.h	2020-01-29 19:18:29.941443870 +0100
@@ -34,7 +34,7 @@
 	IS_2_6 = 0,
 	IS_OTHER
 } kernel_versions;
-kernel_versions kernel_version;
+extern kernel_versions kernel_version;
 
 typedef struct
 {
@@ -49,11 +49,11 @@
 
 } pm_status;
 
-int minBrightness;
-int maxBrightness;
-int waittime; /* /proc polling time */
-char *cpufreq_online_governor;
-char *cpufreq_offline_governor;
+extern int minBrightness;
+extern int maxBrightness;
+extern int waittime; /* /proc polling time */
+extern char *cpufreq_online_governor;
+extern char *cpufreq_offline_governor;
 
 int pm_support(int which_battery);
 void get_power_status(pm_status *power_status);
diff -Naur wmpower-0.4.3.orig/src/power_management/toshiba/toshiba_lib.c wmpower-0.4.3/src/power_management/toshiba/toshiba_lib.c
--- wmpower-0.4.3.orig/src/power_management/toshiba/toshiba_lib.c	2005-09-02 11:46:16.000000000 +0200
+++ wmpower-0.4.3/src/power_management/toshiba/toshiba_lib.c	2020-01-29 19:19:47.112448563 +0100
@@ -57,6 +57,7 @@
 #include "lib_utils.h"
 #include "power_management.h"
 
+char toshiba_model[255];
 
 void UglyHack(void);
 int Get_Fan_Status(void);
diff -Naur wmpower-0.4.3.orig/src/power_management/toshiba/toshiba_lib.h wmpower-0.4.3/src/power_management/toshiba/toshiba_lib.h
--- wmpower-0.4.3.orig/src/power_management/toshiba/toshiba_lib.h	2005-09-02 11:34:04.000000000 +0200
+++ wmpower-0.4.3/src/power_management/toshiba/toshiba_lib.h	2020-01-29 19:19:38.749448053 +0100
@@ -34,7 +34,7 @@
 #define TOSHIBA_LCD_MED 1
 #define TOSHIBA_LCD_MAX 2
 
-char toshiba_model[255];
+extern char toshiba_model[255];
 
 int machine_is_toshiba(int *use_toshiba_hardware);
 int toshiba_get_fan_status(int use_toshiba_hardware);