Modify ci.yml 'on' to run on pull request; Activate linux

ci.yml runs on PR
ci turns on ubuntu
CMakeLists adjusts to turn off werror on linux for now
CMakeLists adjusts to turn off JUCE on linux for now

.github/workflows/ci.yml

@@ -3,6 +3,10 @@ name: CI
 on:
   workflow_dispatch:
   push:
+  pull_request:
+    branches:
+      - main
+      - next
 
 env:
   CMAKE_BUILD_PARALLEL_LEVEL: 3 # Use up to 3 cpus to build juceaide, etc
@@ -29,14 +33,23 @@ jobs:
       fail-fast: false
       matrix:
         app: [ member_enabled, member_disabled, unique_ptr_enabled, unique_ptr_disabled ]
-        os: [ macos-latest, windows-latest ]
+        os: [ macos-latest, windows-latest, ubuntu-latest ]
 
     steps:
       - name: Checkout
         uses: actions/checkout@v3
         with:
           fetch-depth: 1
 
+      - name: Install Linux Deps
+        if: runner.os == 'Linux'
+        run: |
+          sudo apt-get update
+          sudo apt install libasound2-dev libx11-dev libxcomposite-dev libxcursor-dev libxext-dev libxinerama-dev libxrandr-dev libxrender-dev libfreetype6-dev libglu1-mesa-dev libjack-jackd2-dev
+          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 9
+          sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-9 9
+
+
       - name: Run sccache-cache
         uses: mozilla-actions/[email protected]
 

CMakeLists.txt

@@ -24,7 +24,17 @@ if (MelatoninInspector_IS_TOP_LEVEL)
 
     juce_add_gui_app ("${TARGET_NAME}" VERSION 1.0.0)
     target_sources("${TARGET_NAME}" PRIVATE "tests/${TARGET_NAME}.cpp")
-    set_target_properties("${TARGET_NAME}" PROPERTIES COMPILE_WARNING_AS_ERROR ON)
+
+    target_compile_definitions("${TARGET_NAME}" PUBLIC
+        JUCE_USE_CURL=0
+        JUCE_WEB_BROWSER=0
+    )
+
+    if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
+       message(STATUS "Avoiding warnings are errors")
+    else()
+       set_target_properties("${TARGET_NAME}" PROPERTIES COMPILE_WARNING_AS_ERROR ON)
+    endif()
 
 endif ()