Install gcc, gfortran and clang on linux

images/linux/scripts/installers/gcc.sh

@@ -7,19 +7,34 @@
 # Source the helpers for use with the script
 source $HELPER_SCRIPTS/document.sh
 
+function InstallGcc {
+    version=$1
+
+    echo "Installing $version..."
+    apt-get install $version -y
+
+    # Run tests to determine that the software installed as expected
+    echo "Testing to make sure that script performed as expected, and basic scenarios work"
+    if ! command -v $version; then
+        echo "$version was not installed"
+        exit 1
+    fi
+
+    # Document what was added to the image
+    echo "Documenting $version..."
+    DocumentInstalledItem "GNU C++ $($version --version | head -n 1 | cut -d ' ' -f 4)"
+}
+
 # Install GNU C++ compiler
-add-apt-repository ppa:ubuntu-toolchain-r/test -y
 apt-get update -y
-apt-get install g++-7 -y
 
+versions=(
+    "g++-7"
+    "g++-8"
+    "g++-9"
+)
 
-# Run tests to determine that the software installed as expected
-echo "Testing to make sure that script performed as expected, and basic scenarios work"
-if ! command -v g++-7; then
-    echo "GNU C++ was not installed"
-    exit 1
-fi
-
-# Document what was added to the image
-echo "Lastly, documenting what we added to the metadata file"
-DocumentInstalledItem "GNU C++ $(g++-7 --version | head -n 1 | cut -d ' ' -f 4)"
+for version in ${versions[*]}
+do
+    InstallGcc $version
+done