Use GCC10 as default for Ubuntu-20.04

.github/workflows/conan-package-create.yml

@@ -123,6 +123,12 @@ jobs:
                     sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 12
                     sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-12 12
 
+            -   name: Use GCC-10 on ubuntu-20.04
+                if: ${{ startsWith(inputs.runs_on, 'ubuntu-20.04') }}
+                run: |
+                    sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 10
+                    sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-10 10
+
             -   name: Create the default Conan profile
                 run:  conan profile new default --detect
 

.github/workflows/cura-installer.yml

@@ -116,7 +116,7 @@ jobs:
                 run: brew install autoconf automake ninja create-dmg
 
             -   name: Install Linux system requirements
-                if: ${{ runner.os == 'Linux' }}
+                if: ${{ startsWith(inputs.runs_on, 'ubuntu-22.04') }}
                 run: |
                     sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
                     sudo apt update
@@ -127,12 +127,18 @@ jobs:
                     echo "APPIMAGETOOL_LOCATION=$GITHUB_WORKSPACE/appimagetool" >> $GITHUB_ENV
 
             -   name: Install GCC-12 on ubuntu-22.04
-                if: ${{ matrix.os == 'ubuntu-22.04' }}
+                if: ${{ startsWith(inputs.runs_on, 'ubuntu-22.04') }}
                 run: |
                     sudo apt install g++-12 gcc-12 -y
                     sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 12
                     sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-12 12
 
+            -   name: Use GCC-10 on ubuntu-20.04
+                if: ${{ startsWith(inputs.runs_on, 'ubuntu-20.04') }}
+                run: |
+                    sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 10
+                    sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-10 10
+
             -   name: Create the default Conan profile
                 run:  conan profile new default --detect
 

.github/workflows/unit-test.yml

@@ -107,17 +107,14 @@ jobs:
             -   name: Install Linux system requirements
                 if: ${{ runner.os == 'Linux' }}
                 run: |
-                    sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
                     sudo apt update
                     sudo apt upgrade
                     sudo apt install build-essential checkinstall libegl-dev zlib1g-dev libssl-dev ninja-build autoconf libx11-dev libx11-xcb-dev libfontenc-dev libice-dev libsm-dev libxau-dev libxaw7-dev libxcomposite-dev libxcursor-dev libxdamage-dev libxdmcp-dev libxext-dev libxfixes-dev libxi-dev libxinerama-dev libxkbfile-dev libxmu-dev libxmuu-dev libxpm-dev libxrandr-dev libxrender-dev libxres-dev libxss-dev libxt-dev libxtst-dev libxv-dev libxvmc-dev libxxf86vm-dev xtrans-dev libxcb-render0-dev libxcb-render-util0-dev libxcb-xkb-dev libxcb-icccm4-dev libxcb-image0-dev libxcb-keysyms1-dev libxcb-randr0-dev libxcb-shape0-dev libxcb-sync-dev libxcb-xfixes0-dev libxcb-xinerama0-dev xkb-data libxcb-dri3-dev uuid-dev libxcb-util-dev libxkbcommon-x11-dev pkg-config -y
 
-            -   name: Install GCC-12 on ubuntu-22.04
-                if: ${{ startsWith(inputs.runs_on, 'ubuntu-22.04') }}
+            -   name: Use GCC-10 on ubuntu-20.04
                 run: |
-                    sudo apt install g++-12 gcc-12 -y
-                    sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 12
-                    sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-12 12
+                    sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 10
+                    sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-10 10
 
             -   name: Get Conan configuration
                 run: conan config install https://github.com/Ultimaker/conan-config.git