From fe27d2bfc2eb5bf7f761b22bba9420c1799da2f4 Mon Sep 17 00:00:00 2001
From: Luca Deri <deri@ntop.org>
Date: Mon, 17 Aug 2020 09:38:53 +0200
Subject: [PATCH] Fixed debian dependency

---
 packages/debian/configure            | 32 +++++++++++++---------------
 packages/debian/configure.in         |  8 +++++++
 packages/debian/debian/control.in    |  2 +-
 packages/debian/debian/n2n.substvars |  1 -
 4 files changed, 24 insertions(+), 19 deletions(-)

diff --git a/packages/debian/configure b/packages/debian/configure
index f5333e2..c7ceac1 100755
--- a/packages/debian/configure
+++ b/packages/debian/configure
@@ -583,10 +583,11 @@ PACKAGE_URL=''
 
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
-N2N_VERSION_SHORT
-GIT_COMMITS
+EXTRA_DEP
 DATE
 EXTN
+GIT_COMMITS
+N2N_VERSION_SHORT
 MACHINE
 APP
 target_alias
@@ -608,7 +609,6 @@ infodir
 docdir
 oldincludedir
 includedir
-runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -673,7 +673,6 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
-runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
@@ -926,15 +925,6 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
-  -runstatedir | --runstatedir | --runstatedi | --runstated \
-  | --runstate | --runstat | --runsta | --runst | --runs \
-  | --run | --ru | --r)
-    ac_prev=runstatedir ;;
-  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
-  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
-  | --run=* | --ru=* | --r=*)
-    runstatedir=$ac_optarg ;;
-
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1072,7 +1062,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir runstatedir
+		libdir localedir mandir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -1225,7 +1215,6 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
-  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@@ -1680,9 +1669,20 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
+# NOTE: this file is not actually used. You need to edit configure as well!
+N2N_VERSION_SHORT=`grep N2N_VERSION_SHORT ../../Makefile | head -1| cut -d "=" -f 2`
+GIT_COMMITS=`grep GIT_COMMITS ../../Makefile | head -1| cut -d "=" -f 2`
+
 MACHINE=`uname -m`
 SHORT_MACHINE=`uname -m | cut -b1-3`
 
+DEBIAN_VERSION=`cat /etc/debian_version | grep "^8" | wc -l`
+
+EXTRA_DEP=""
+if test $DEBIAN_VERSION = "0"; then
+EXTRA_DEP=", libzstd1"
+fi
+
 if test $MACHINE = "x86_64"; then
    EXTN="amd64"
 else
@@ -1705,8 +1705,6 @@ else
 fi
 
 APP=n2n
-N2N_VERSION_SHORT=`grep N2N_VERSION_SHORT ../../Makefile | head -1| cut -d "=" -f 2`
-GIT_COMMITS=`grep GIT_COMMITS ../../Makefile | head -1| cut -d "=" -f 2`
 DATE=`date -R`
 
 
diff --git a/packages/debian/configure.in b/packages/debian/configure.in
index fe86b74..1f876c0 100644
--- a/packages/debian/configure.in
+++ b/packages/debian/configure.in
@@ -7,6 +7,13 @@ GIT_COMMITS=`grep GIT_COMMITS ../../Makefile | head -1| cut -d "=" -f 2`
 MACHINE=`uname -m`
 SHORT_MACHINE=`uname -m | cut -b1-3`
 
+DEBIAN_VERSION=`cat /etc/debian_version | grep "^8" | wc -l`
+
+EXTRA_DEP=""
+if test $DEBIAN_VERSION = "0"; then
+EXTRA_DEP=", libzstd1"
+fi
+
 if test $MACHINE = "x86_64"; then
    EXTN="amd64"
 else
@@ -37,6 +44,7 @@ AC_SUBST(N2N_VERSION_SHORT)
 AC_SUBST(GIT_COMMITS)
 AC_SUBST(EXTN)
 AC_SUBST(DATE)
+AC_SUBST(EXTRA_DEP)
 
 AC_CONFIG_FILES(debian/changelog)
 AC_CONFIG_FILES(debian/files)
diff --git a/packages/debian/debian/control.in b/packages/debian/debian/control.in
index 45e7740..9fe4aad 100644
--- a/packages/debian/debian/control.in
+++ b/packages/debian/debian/control.in
@@ -8,7 +8,7 @@ Build-Depends:
 Package: n2n
 Architecture: @EXTN@
 Suggests: uml-utilities
-Depends: ${shlibs:Depends}, ${misc:Depends}, libzstd1
+Depends: ${shlibs:Depends}, ${misc:Depends} @EXTRA_DEP@
 Conflicts: n2n (<< 2.1.0-1)
 Replaces: n2n (<< 2.1.0-1)
 Description: a layer-two peer-to-peer virtual private network (VPN)
diff --git a/packages/debian/debian/n2n.substvars b/packages/debian/debian/n2n.substvars
index a595723..a8fe3cf 100644
--- a/packages/debian/debian/n2n.substvars
+++ b/packages/debian/debian/n2n.substvars
@@ -1,2 +1 @@
 misc:Depends=debconf (>= 0.5) | debconf-2.0
-misc:Pre-Depends=