diff -Nru telegram-cli-1.3.1+git20160323.6547c0b21/debian/changelog telegram-cli-1.3.1+git20160323.6547c0b21/debian/changelog
--- telegram-cli-1.3.1+git20160323.6547c0b21/debian/changelog	2019-10-19 19:58:40.000000000 +0000
+++ telegram-cli-1.3.1+git20160323.6547c0b21/debian/changelog	2020-07-25 16:06:56.000000000 +0000
@@ -1,8 +1,9 @@
-telegram-cli (1.3.1+git20160323.6547c0b21-1build1) focal; urgency=medium
+telegram-cli (1.3.1+git20160323.6547c0b21-2) unstable; urgency=low
 
-  * No-change rebuild for libevent soname changes.
+  * Port to GCC-10 (Closes: #957865)
+    - debian/patches/0003_port_to_gcc10.patch
 
- -- Matthias Klose <doko@ubuntu.com>  Sat, 19 Oct 2019 19:58:40 +0000
+ -- Ying-Chun Liu (PaulLiu) <paulliu@debian.org>  Sun, 26 Jul 2020 00:06:56 +0800
 
 telegram-cli (1.3.1+git20160323.6547c0b21-1) unstable; urgency=low
 
diff -Nru telegram-cli-1.3.1+git20160323.6547c0b21/debian/patches/0003_port_to_gcc10.patch telegram-cli-1.3.1+git20160323.6547c0b21/debian/patches/0003_port_to_gcc10.patch
--- telegram-cli-1.3.1+git20160323.6547c0b21/debian/patches/0003_port_to_gcc10.patch	1970-01-01 00:00:00.000000000 +0000
+++ telegram-cli-1.3.1+git20160323.6547c0b21/debian/patches/0003_port_to_gcc10.patch	2020-07-25 16:06:56.000000000 +0000
@@ -0,0 +1,76 @@
+Description: Porting to GCC-10
+ GCC 10 uses -fno-common. Thus we should not duplicate global variables.
+Author: Ying-Chun Liu (PaulLiu) <paulliu@debian.org>
+Bug-Debian: https://bugs.debian.org/957865
+Last-Update: 2020-07-25
+
+Index: telegram-cli-1.3.1+git20160323.6547c0b21/loop.c
+===================================================================
+--- telegram-cli-1.3.1+git20160323.6547c0b21.orig/loop.c
++++ telegram-cli-1.3.1+git20160323.6547c0b21/loop.c
+@@ -74,7 +74,7 @@
+ 
+ #include <openssl/sha.h>
+ 
+-int verbosity;
++extern int verbosity;
+ extern int readline_disabled;
+ extern char *bot_hash;
+ 
+@@ -87,7 +87,7 @@ extern int binlog_enabled;
+ 
+ extern int unknown_user_list_pos;
+ extern int unknown_user_list[];
+-int register_mode;
++extern int register_mode;
+ extern int safe_quit;
+ extern int sync_from_start;
+ 
+@@ -389,7 +389,7 @@ int zero[512];
+ 
+ int readline_active;
+ int new_dc_num;
+-int wait_dialog_list;
++extern int wait_dialog_list;
+ 
+ extern struct tgl_update_callback upd_cb;
+ 
+Index: telegram-cli-1.3.1+git20160323.6547c0b21/interface.c
+===================================================================
+--- telegram-cli-1.3.1+git20160323.6547c0b21.orig/interface.c
++++ telegram-cli-1.3.1+git20160323.6547c0b21/interface.c
+@@ -117,11 +117,11 @@ extern int one_string_len;
+ extern char *one_string_prompt;
+ extern int one_string_flags;
+ extern int enable_json;
+-int disable_auto_accept;
+-int msg_num_mode;
+-int permanent_msg_id_mode;
+-int permanent_peer_id_mode;
+-int disable_colors;
++extern int disable_auto_accept;
++extern int msg_num_mode;
++extern int permanent_msg_id_mode;
++extern int permanent_peer_id_mode;
++extern int disable_colors;
+ extern int alert_sound;
+ extern int binlog_read;
+ extern char *home_directory;
+@@ -130,7 +130,7 @@ int do_html;
+ int safe_quit;
+ 
+ int in_readline;
+-int readline_active;
++extern  int readline_active;
+ 
+ int log_level;
+ 
+@@ -3711,7 +3711,7 @@ void interpreter (char *line) {
+   interpreter_ex (line, 0);
+ }
+ 
+-int readline_active;
++extern int readline_active;
+ /*void rprintf (const char *format, ...) {
+   mprint_start (ev);
+   va_list ap;
diff -Nru telegram-cli-1.3.1+git20160323.6547c0b21/debian/patches/series telegram-cli-1.3.1+git20160323.6547c0b21/debian/patches/series
--- telegram-cli-1.3.1+git20160323.6547c0b21/debian/patches/series	2019-01-20 06:16:17.000000000 +0000
+++ telegram-cli-1.3.1+git20160323.6547c0b21/debian/patches/series	2020-07-25 15:58:15.000000000 +0000
@@ -1,2 +1,3 @@
 0001_use_system_tl-parser.patch
 0002_use_system_tgl.patch
+0003_port_to_gcc10.patch