add ubuntu set-up job to build action

.github/actions/do_build_ock/action.yml

@@ -104,15 +104,13 @@ inputs:
     description: "which shell to use (default bash)"
     default: bash
 
-env:
-  EXTERNAL_CLC: unset
-
 runs:
   # we don't want a new docker just a list of steps, so mark as composite
   using: "composite"
   steps:
 
     - name: set ICD registry
+      id: set_windows
       if: startsWith(runner.os, 'Windows')
       shell: ${{ inputs.shell_to_use }}
       run: |
@@ -122,9 +120,16 @@ runs:
         $PATTERN = '[\\]'
         $GITHUB_WORKSPACELINUX = $GITHUB_WORKSPACELINUX -replace $PATTERN, '/'
         echo GITHUB_WORKSPACELINUX is $GITHUB_WORKSPACELINUX
-        echo EXTERNAL_CLC is $env.EXTERNAL_CLC
-        $env.EXTERNAL_CLC = $GITHUB_WORKSPACELINUX
-        echo EXTERNAL_CLC is $env.EXTERNAL_CLC
+        echo "windwsclc=$GITHUB_WORKSPACELINUX" >> $GITHUB_OUTPUT
+
+    - name: set external_clc ubuntu
+      id: set_ubuntu
+      if: startsWith(runner.os, 'Ubuntu')
+      shell: ${{ inputs.shell_to_use }}
+      run: |
+        GITHUB_WORKSPACELINUX = ${{ inputs.external_clc }}
+        echo GITHUB_WORKSPACELINUX is $GITHUB_WORKSPACELINUX
+        echo "ubuntuclc=$GITHUB_WORKSPACELINUX" >> $GITHUB_OUTPUT
 
     - name: cmake_ock
       shell: ${{ inputs.shell_to_use }}