Arm32 architecture (#82)

* Added 32-bit Arm gn file

It seems like the docker images can compile for Arm 32-bit now. I needed this to run on a headless RaspberryPi, and it appears to work just fine after installing libnss3.

I also updated the README.md to refer to the current docker image (jonmmease/chromium-builder:0.9) that's pulled in the build_kaleido script as of Commit 37e6ec4

* Add arm circleci job

* Comment out other CI jobs for testing arm build

Co-authored-by: Alec G. Moore <agm@knights.ucf.edu>

.circleci/config.yml

@@ -153,6 +153,16 @@ jobs:
       - linux_build:
           arch: "arm64"
 
+  linux_build_arm:
+    machine: 
+      image: ubuntu-1604:201903-01 # the primary container, where your job's commands are run
+    resource_class: xlarge
+    environment:
+      KALEIDO_ARCH: "arm"
+    steps:
+      - linux_build:
+          arch: "arm"
+
   linux_test_37:
     docker:
       - image: continuumio/miniconda3
@@ -316,56 +326,63 @@ jobs:
           arch: "x86"
 
 workflows:
-  build-windows-x64:
-    jobs:
-      - windows_fetch
-      - windows_build_x64:
-          requires:
-            - windows_fetch
+  #build-windows-x64:
+    #jobs:
+      #- windows_fetch
+      #- windows_build_x64:
+          #requires:
+            #- windows_fetch
 
-  build-windows-x86:
-    jobs:
-      - windows_fetch
-      - windows_build_x86:
-          requires:
-            - windows_fetch
+  #build-windows-x86:
+    #jobs:
+      #- windows_fetch
+      #- windows_build_x86:
+          #requires:
+            #- windows_fetch
 
-  build-mac-x64:
-    jobs:
-      - mac_fetch
-      - mac_build_blink_x64:
-          requires:
-            - mac_fetch
-      - mac_build_x64:
-          requires:
-            - mac_build_blink_x64
+  #build-mac-x64:
+    #jobs:
+      #- mac_fetch
+      #- mac_build_blink_x64:
+          #requires:
+            #- mac_fetch
+      #- mac_build_x64:
+          #requires:
+            #- mac_build_blink_x64
 
-  build-mac-arm64:
-    jobs:
-      - mac_fetch
-      - mac_build_blink_arm64:
-          requires:
-            - mac_fetch
-      - mac_build_arm64:
-          requires:
-            - mac_build_blink_arm64
+  #build-mac-arm64:
+    #jobs:
+      #- mac_fetch
+      #- mac_build_blink_arm64:
+          #requires:
+            #- mac_fetch
+      #- mac_build_arm64:
+          #requires:
+            #- mac_build_blink_arm64
 
-  build-linux-x64:
-    jobs:
-      - linux_fetch
-      - linux_build_x64:
-          requires:
-            - linux_fetch
-      - linux_test_37:
-          requires:
-            - linux_build_x64
-      - linux_test_27:
-          requires:
-            - linux_build_x64
+  #build-linux-x64:
+    #jobs:
+      #- linux_fetch
+      #- linux_build_x64:
+          #requires:
+            #- linux_fetch
+      #- linux_test_37:
+          #requires:
+            #- linux_build_x64
+      #- linux_test_27:
+          #requires:
+            #- linux_build_x64
+
+  #build-linux-arm64:
+    #jobs:
+      #- linux_fetch
+      #- linux_build_arm64:
+          #requires:
+            #- linux_fetch
 
-  build-linux-arm64:
+  build-linux-arm:
     jobs:
       - linux_fetch
-      - linux_build_arm64:
+      - linux_build_arm:
           requires:
             - linux_fetch

README.md

@@ -125,7 +125,7 @@ There are two approaches to building Kaleido on Linux, both of which rely on Doc
 The Linux build relies on the `jonmmease/chromium-builder` docker image, and the scripts in `repos/linux_scripts`, to download the chromium source to a local folder and then build it.
 Download docker image
 ```
-$ docker pull jonmmease/chromium-builder:0.8
+$ docker pull jonmmease/chromium-builder:0.9
 ```
 
 Fetch the Chromium codebase and checkout the specific tag, then sync all dependencies
@@ -188,14 +188,14 @@ The `chromium-builder` container mostly follows the instructions at https://chro
 Build container with:
 
 ```
-$ docker build -t jonmmease/chromium-builder:0.8 -f repos/linux_scripts/Dockerfile .
+$ docker build -t jonmmease/chromium-builder:0.9 -f repos/linux_scripts/Dockerfile .
 ```
 
 ## kaleido-builder
 This container contains a pre-compiled version of chromium source tree. Takes several hours to build!
 
 ```
-$ docker build -t jonmmease/kaleido-builder:0.8 -f repos/linux_full_scripts/Dockerfile .
+$ docker build -t jonmmease/kaleido-builder:0.9 -f repos/linux_full_scripts/Dockerfile .
 ```
 
 

repos/linux_scripts/args_arm.gn

@@ -0,0 +1,9 @@
+import("//build/args/headless.gn")
+enable_nacl=false
+is_component_build=false
+
+symbol_level=0
+blink_symbol_level=0
+is_debug=false
+
+target_cpu="arm"