Added patch for c linkages

icecat-78.7.1-fix_error_template_with_C_linkage.patch

@@ -0,0 +1,16 @@
+--- a/other-licenses/atk-1.0/atk/atkobject.orig.h	2021-02-05 19:53:35.000000000 +0100
++++ b/other-licenses/atk-1.0/atk/atkobject.h	2021-02-06 19:29:57.596256493 +0100
+@@ -20,11 +20,12 @@
+ #ifndef __ATK_OBJECT_H__
+ #define __ATK_OBJECT_H__
+ 
++#include <glib-object.h>
++
+ #ifdef __cplusplus
+ extern "C" {
+ #endif /* __cplusplus */
+ 
+-#include <glib-object.h>
+ #include <atk/atkstate.h>
+ #include <atk/atkrelationtype.h>
+ 

thunderbird.spec

@@ -119,6 +119,7 @@ Patch417:       build-aarch64-user_vfp.patch
 Patch418:       mozilla-1512162.patch
 Patch419:       bindgen-d0dfc52706f23db9dc9d74642eeebd89d73cb8d0.patch
 Patch103:       rhbz-1219542-s390-build.patch
+Patch104:       icecat-78.7.1-fix_error_template_with_C_linkage.patch
 
 # PPC fix
 Patch304:       mozilla-1245783.patch
@@ -246,6 +247,7 @@ debug %{name}, you want to install %{name}-debuginfo instead.
 %ifarch s390
 %patch103 -p1 -b .rhbz-1219542-s390-build
 %endif
+%patch104 -p1 -b .c-linkages
 
 %patch304 -p1 -b .1245783
 # Patch for big endian platforms only