Add -fcommon compiler flag for compatibility with GCC 10.

Compliant to policy 4.5.0

debian/changelog

@@ -1,3 +1,11 @@
+g15daemon (1.9.5.3-12) unstable; urgency=medium
+
+  * Add -fcommon compiler flag for compatibility with GCC 10.
+    (Closes: bug#957243)
+  * Compliant to policy 4.5.0
+
+ -- Alexander Ponyatykh <lazyranma@gmail.com>  Tue, 28 Jul 2020 23:37:13 +0300
+
 g15daemon (1.9.5.3-11) unstable; urgency=medium
 
   * Reinitialize on eny error code, not only on a negative one.

debian/control

@@ -10,7 +10,7 @@ Build-Depends:
  libg15-dev (>= 1.2.7-3),
  libg15render-dev (>= 1.2.0.svn250-2),
  libtool
-Standards-Version: 4.4.1
+Standards-Version: 4.5.0
 Homepage: https://sourceforge.net/projects/g15daemon/
 Vcs-Browser: https://salsa.debian.org/debian/g15daemon
 Vcs-Git: https://salsa.debian.org/debian/g15daemon.git

debian/rules

@@ -1,6 +1,7 @@
 #!/usr/bin/make -f
 
 DH_VERBOSE = 1
+export DEB_CFLAGS_MAINT_APPEND = -fcommon
 
 %:
 	dh $@