ARM64 support

.gitignore

@@ -0,0 +1,2 @@
+nimcache/
+

.travis.yml

@@ -9,9 +9,15 @@ git:
   # when multiple CI builds are queued, the tested commit needs to be in the last X commits cloned with "--depth X"
   depth: 10
 
-os:
-  - linux
-  - osx
+matrix:
+  include:
+    - os: linux
+      arch: amd64
+      sudo: required
+    - os: linux
+      arch: arm64
+      sudo: required
+    - os: osx
 
 install:
   # build nim from our own branch - this to avoid the day-to-day churn and

bearssl/decls.nim

@@ -49,7 +49,8 @@ else:
 
 when sizeof(int) == 8:
   {.passC: "-DBR_64=1".}
-  {.passC:" -DBR_amd64=1".}
+  when hostCPU == "amd64":
+    {.passC:" -DBR_amd64=1".}
   when defined(vcc):
     {.passC: "-DBR_UMUL128=1".}
   else: