update min cmake for tests

.github/workflows/linux-ci.yml

@@ -9,16 +9,16 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/checkout@v2
     - name: Install dependencies
       run: |
         sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
         sudo apt-get update -qq
-        sudo apt-get install -y gcc-7 g++-7
-        sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 70 --slave /usr/bin/g++ g++ /usr/bin/g++-7
+        sudo apt-get install -y gcc-11 g++-11
+        sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-11 70 --slave /usr/bin/g++ g++ /usr/bin/g++-11
         sudo apt-get install -y tcl8.6-dev
     - name: make
       run: make

.github/workflows/mac-ci.yml

@@ -16,12 +16,12 @@ jobs:
     - name: Install dependencies
       run: |
         brew update
-        brew install tcl-tk || true
+        brew install tcl-tk@8 || true
         sudo mkdir -p /usr/local
-        sudo ln -sf /usr/local/opt/tcl-tk/include/tcl-tk /usr/local/include/tcl8.6
-        sudo install /usr/local/opt/tcl-tk/lib/libtcl* /usr/local/lib
-        sudo ln -sf /usr/local/opt/tcl-tk/bin/tclsh8.6 /usr/local/bin/tclsh
-        sudo ln -sf /usr/local/opt/tcl-tk/bin/tclsh8.6 /usr/local/bin/tclsh8.6
+        sudo ln -sf /usr/local/opt/tcl-tk@8/include/tcl-tk /usr/local/include/tcl8.6
+        sudo install /usr/local/opt/tcl-tk@8/lib/libtcl* /usr/local/lib
+        sudo ln -sf /usr/local/opt/tcl-tk@8/bin/tclsh8.6 /usr/local/bin/tclsh
+        sudo ln -sf /usr/local/opt/tcl-tk@8/bin/tclsh8.6 /usr/local/bin/tclsh8.6
     - name: make
       run: make
     - name: install

test/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.8)
 
 set(TCL_TCLSH tclsh8.6)