From 772752c551d4a98997eca9ec0991a7987c95cd36 Mon Sep 17 00:00:00 2001
From: Arnaud Giersch <arnaud.giersch@univ-fcomte.fr>
Date: Fri, 26 Feb 2021 10:16:01 +0100
Subject: [PATCH] Need at least ns-3.28.

---
 CMakeLists.txt         | 3 +++
 tools/jenkins/build.sh | 7 ++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dae34bc442..66878ed333 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -237,6 +237,9 @@ set(SIMGRID_HAVE_NS3 0)
 if(enable_ns3)
   include(FindNS3)
   if (SIMGRID_HAVE_NS3)
+    if (NS3_VERSION VERSION_LESS "3.28")
+      message(FATAL_ERROR "SimGrid needs at least ns-3.28. Please ugrade or disable that cmake option")
+    endif()
     set(SIMGRID_HAVE_NS3 1)
     foreach(lib core csma point-to-point internet network applications wifi)
       set(SIMGRID_DEP "${SIMGRID_DEP} -lns${NS3_VERSION}-${lib}${NS3_SUFFIX}")
diff --git a/tools/jenkins/build.sh b/tools/jenkins/build.sh
index e490083396..b44245a69a 100755
--- a/tools/jenkins/build.sh
+++ b/tools/jenkins/build.sh
@@ -145,7 +145,12 @@ mkdir "$WORKSPACE"/build
 cd "$WORKSPACE"/build
 
 have_NS3="no"
-if [ "$os" = "Debian" ] || [ "$os" = "Ubuntu" ] || [ "$os" = "NixOS" ] ; then
+if [ "$os" = "Debian" ] || [ "$os" = "Ubuntu" ] ; then
+  if dpkg --compare-versions "$(dpkg-query -f '${Version}' -W libns3-dev)" ge 3.28; then
+    have_NS3="yes"
+  fi
+fi
+if [ "$os" = "NixOS" ] ; then
   have_NS3="yes"
 fi
 echo "XX have_NS3: ${have_NS3}"
-- 
2.20.1