diff -Naur xf86-video-openchrome-20200131.orig/src/via_driver.h xf86-video-openchrome-20200131/src/via_driver.h
--- xf86-video-openchrome-20200131.orig/src/via_driver.h	2020-02-21 10:52:01.523263642 +0100
+++ xf86-video-openchrome-20200131/src/via_driver.h	2020-01-23 01:27:57.000000000 +0100
@@ -361,8 +361,8 @@
 void viaProcessOptions(ScrnInfoPtr pScrn);
 
 /* In via_display.c. */
-const xf86CrtcFuncsRec iga1_crtc_funcs;
-const xf86CrtcFuncsRec iga2_crtc_funcs;
+extern xf86CrtcFuncsRec iga1_crtc_funcs;
+extern xf86CrtcFuncsRec iga2_crtc_funcs;
 
 /* In via_exa.c. */
 Bool viaInitExa(ScreenPtr pScreen);
diff -Naur xf86-video-openchrome-20200131.orig/src/via_sii164.h xf86-video-openchrome-20200131/src/via_sii164.h
--- xf86-video-openchrome-20200131.orig/src/via_sii164.h	2020-02-21 10:52:52.587481902 +0100
+++ xf86-video-openchrome-20200131/src/via_sii164.h	2020-01-23 01:27:57.000000000 +0100
@@ -51,7 +51,7 @@
 } viaSiI164Rec, *viaSiI164RecPtr;
 
 
-const xf86OutputFuncsRec via_sii164_funcs;
+extern xf86OutputFuncsRec via_sii164_funcs;
 
 Bool viaSiI164Probe(ScrnInfoPtr pScrn, I2CBusPtr pI2CBus);
 void viaSiI164Init(ScrnInfoPtr pScrn);
diff -Naur xf86-video-openchrome-20200131.orig/src/via_vt1632.h xf86-video-openchrome-20200131/src/via_vt1632.h
--- xf86-video-openchrome-20200131.orig/src/via_vt1632.h	2020-02-21 10:53:44.302702683 +0100
+++ xf86-video-openchrome-20200131/src/via_vt1632.h	2020-01-23 01:27:57.000000000 +0100
@@ -51,7 +51,7 @@
 } viaVT1632Rec, *viaVT1632RecPtr;
 
 
-const xf86OutputFuncsRec via_vt1632_funcs;
+extern xf86OutputFuncsRec via_vt1632_funcs;
 
 Bool viaVT1632Probe(ScrnInfoPtr pScrn, I2CBusPtr pI2CBus);
 void viaVT1632Init(ScrnInfoPtr pScrn);
diff -Naur xf86-video-openchrome-20200131.orig/src/via_display.c xf86-video-openchrome-20200131/src/via_display.c
--- xf86-video-openchrome-20200131.orig/src/via_display.c	2020-01-23 01:27:57.000000000 +0100
+++ xf86-video-openchrome-20200131/src/via_display.c	2020-02-21 11:32:04.897052977 +0100
@@ -3492,7 +3492,7 @@
         free(crtc->driver_private);
 }
 
-const xf86CrtcFuncsRec iga1_crtc_funcs = {
+extern xf86CrtcFuncsRec iga1_crtc_funcs = {
     .dpms                   = iga1_crtc_dpms,
     .save                   = iga1_crtc_save,
     .restore                = iga1_crtc_restore,
@@ -3897,7 +3897,7 @@
     viaIGA2SetHIStartingAddress(crtc);
 }
 
-const xf86CrtcFuncsRec iga2_crtc_funcs = {
+extern xf86CrtcFuncsRec iga2_crtc_funcs = {
     .dpms                   = iga2_crtc_dpms,
     .save                   = iga2_crtc_save,
     .restore                = iga2_crtc_restore,
diff -Naur xf86-video-openchrome-20200131.orig/src/via_sii164.c xf86-video-openchrome-20200131/src/via_sii164.c
--- xf86-video-openchrome-20200131.orig/src/via_sii164.c	2020-01-23 01:27:57.000000000 +0100
+++ xf86-video-openchrome-20200131/src/via_sii164.c	2020-02-21 11:33:42.114499095 +0100
@@ -400,7 +400,7 @@
 {
 }
 
-const xf86OutputFuncsRec via_sii164_funcs = {
+extern xf86OutputFuncsRec via_sii164_funcs = {
     .create_resources   = via_sii164_create_resources,
     .dpms               = via_sii164_dpms,
     .save               = via_sii164_save,
diff -Naur xf86-video-openchrome-20200131.orig/src/via_vt1632.c xf86-video-openchrome-20200131/src/via_vt1632.c
--- xf86-video-openchrome-20200131.orig/src/via_vt1632.c	2020-01-23 01:27:57.000000000 +0100
+++ xf86-video-openchrome-20200131/src/via_vt1632.c	2020-02-21 11:33:01.730313892 +0100
@@ -412,7 +412,7 @@
 {
 }
 
-const xf86OutputFuncsRec via_vt1632_funcs = {
+extern xf86OutputFuncsRec via_vt1632_funcs = {
     .create_resources   = via_vt1632_create_resources,
     .dpms               = via_vt1632_dpms,
     .save               = via_vt1632_save,