From 43d8ee586f254b463ae20d7458bc3714138518a5 Mon Sep 17 00:00:00 2001
From: Robert Schmidt <robert.schmidt@openairinterface.org>
Date: Tue, 17 Jan 2023 16:43:16 +0100
Subject: [PATCH 1/3] Upgrade cmake to 3.12

Prior to this version, we cannot use target_link_libraries() with OBJECT
libraries.
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 116b8a55d2..d168aa746e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,7 +21,7 @@
 
 # Author: laurent THOMAS, Lionel GAUTHIER
 
-cmake_minimum_required (VERSION 3.5)
+cmake_minimum_required (VERSION 3.12)
 project (OpenAirInterface LANGUAGES C CXX)
 
 #########################################################

From 2debc770ec7e5b0a3a60f1d4fd7c886796e14d65 Mon Sep 17 00:00:00 2001
From: Jaroslava Fiedlerova <Jaroslava.Fiedlerova@openairinterface.org>
Date: Fri, 17 Feb 2023 23:10:41 +0100
Subject: [PATCH 2/3] add repo for ubuntu 18 to install cmake >= 3.12

---
 cmake_targets/tools/build_helper | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/cmake_targets/tools/build_helper b/cmake_targets/tools/build_helper
index 5af626b182..b45579f525 100755
--- a/cmake_targets/tools/build_helper
+++ b/cmake_targets/tools/build_helper
@@ -523,7 +523,15 @@ check_install_soapy () {
     install_soapy_from_source
     #fi
     install_soapy_iris_from_source
+}
 
+# for ubuntu 18 we need a special repository to install cmake >= 3.12
+add_cmake_repo () {
+  wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | gpg --dearmor - | sudo tee /usr/share/keyrings/kitware-archive-keyring.gpg >/dev/null
+  echo 'deb [signed-by=/usr/share/keyrings/kitware-archive-keyring.gpg] https://apt.kitware.com/ubuntu/ bionic main' | sudo tee /etc/apt/sources.list.d/kitware.list >/dev/null
+  $SUDO apt-get update
+  $SUDO rm /usr/share/keyrings/kitware-archive-keyring.gpg
+  $SUDO apt-get install kitware-archive-keyring
 }
 
 check_install_additional_tools (){
@@ -578,6 +586,7 @@ check_install_oai_software() {
     $SUDO apt install -y software-properties-common
     case "$(get_distribution_release)" in
         "ubuntu18.04")
+            add_cmake_repo
             specific_packages="libgcrypt11-dev guile-2.0-dev"
             ;;
         "ubuntu20.04")

From c6d880329d40618517a8b969687a52824fa3286a Mon Sep 17 00:00:00 2001
From: Jaroslava Fiedlerova <Jaroslava.Fiedlerova@openairinterface.org>
Date: Tue, 21 Feb 2023 12:07:28 +0100
Subject: [PATCH 3/3] Install cmake >= 3.12 on Ubuntu 18 fix, link to repo
 added

---
 cmake_targets/tools/build_helper | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/cmake_targets/tools/build_helper b/cmake_targets/tools/build_helper
index b45579f525..4c951890d9 100755
--- a/cmake_targets/tools/build_helper
+++ b/cmake_targets/tools/build_helper
@@ -525,13 +525,14 @@ check_install_soapy () {
     install_soapy_iris_from_source
 }
 
-# for ubuntu 18 we need a special repository to install cmake >= 3.12
+# for ubuntu 18 we need a special repository (https://apt.kitware.com/) to install cmake >= 3.12
 add_cmake_repo () {
-  wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | gpg --dearmor - | sudo tee /usr/share/keyrings/kitware-archive-keyring.gpg >/dev/null
-  echo 'deb [signed-by=/usr/share/keyrings/kitware-archive-keyring.gpg] https://apt.kitware.com/ubuntu/ bionic main' | sudo tee /etc/apt/sources.list.d/kitware.list >/dev/null
-  $SUDO apt-get update
+  $SUDO $INSTALLER -y install wget
+  wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | gpg --dearmor - | $SUDO tee /usr/share/keyrings/kitware-archive-keyring.gpg >/dev/null
+  echo 'deb [signed-by=/usr/share/keyrings/kitware-archive-keyring.gpg] https://apt.kitware.com/ubuntu/ bionic main' | $SUDO tee /etc/apt/sources.list.d/kitware.list >/dev/null
+  $SUDO $INSTALLER -y update
   $SUDO rm /usr/share/keyrings/kitware-archive-keyring.gpg
-  $SUDO apt-get install kitware-archive-keyring
+  $SUDO $INSTALLER -y install kitware-archive-keyring
 }
 
 check_install_additional_tools (){