diff --git a/.travis.yml b/.travis.yml
index c1ad9005c..4fce41c63 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,46 +1,46 @@
 # Travis Continuous Integration Configuration File
 matrix:
   include:
-    - os: linux
-      dist: trusty
-      sudo: required
-      cache: apt
-      env: DOCKER_IMAGE=ubuntu:trusty
-    - os: linux
-      dist: trusty
-      sudo: required
-      cache: apt
-      env: DOCKER_IMAGE=ubuntu:xenial
-    - os: linux
-      dist: trusty
-      sudo: required
-      cache: apt
-      env: DOCKER_IMAGE=osrf/ubuntu_armhf:trusty
-    - os: linux
-      dist: trusty
-      sudo: required
-      cache: apt
-      env: DOCKER_IMAGE=osrf/ubuntu_armhf:xenial
-    - os: linux
-      dist: trusty
-      sudo: required
-      cache: apt
-      env: DOCKER_IMAGE=osrf/ubuntu_arm64:trusty
-    - os: linux
-      dist: trusty
-      sudo: required
-      cache: apt
-      env: DOCKER_IMAGE=osrf/ubuntu_arm64:xenial
-    - os: linux
-      dist: trusty
-      sudo: required
-      cache: apt
-      env: DOCKER_IMAGE=debian:jessie
-    - os: linux
-      dist: trusty
-      sudo: required
-      cache: apt
-      env: DOCKER_IMAGE=osrf/debian_arm64:jessie
+    # - os: linux
+    #   dist: trusty
+    #   sudo: required
+    #   cache: apt
+    #   env: DOCKER_IMAGE=ubuntu:trusty
+    # - os: linux
+    #   dist: trusty
+    #   sudo: required
+    #   cache: apt
+    #   env: DOCKER_IMAGE=ubuntu:xenial
+    # - os: linux
+    #   dist: trusty
+    #   sudo: required
+    #   cache: apt
+    #   env: DOCKER_IMAGE=osrf/ubuntu_armhf:trusty
+    # - os: linux
+    #   dist: trusty
+    #   sudo: required
+    #   cache: apt
+    #   env: DOCKER_IMAGE=osrf/ubuntu_armhf:xenial
+    # - os: linux
+    #   dist: trusty
+    #   sudo: required
+    #   cache: apt
+    #   env: DOCKER_IMAGE=osrf/ubuntu_arm64:trusty
+    # - os: linux
+    #   dist: trusty
+    #   sudo: required
+    #   cache: apt
+    #   env: DOCKER_IMAGE=osrf/ubuntu_arm64:xenial
+    # - os: linux
+    #   dist: trusty
+    #   sudo: required
+    #   cache: apt
+    #   env: DOCKER_IMAGE=debian:jessie
+    # - os: linux
+    #   dist: trusty
+    #   sudo: required
+    #   cache: apt
+    #   env: DOCKER_IMAGE=osrf/debian_arm64:jessie
     - os: osx
 env:
   global:
diff --git a/lisp/Makefile.Darwin b/lisp/Makefile.Darwin
index df7814f41..5300428a1 100644
--- a/lisp/Makefile.Darwin
+++ b/lisp/Makefile.Darwin
@@ -53,7 +53,7 @@ DEBUG= -g
 # If you use libc.so.5, remove -DLIB6 option.
 # In order to include thread library, libc.so.6 is preferrable.
 
-CFLAGS=-D$(MACHINE) -Wno-return-type -DLinux -D_REENTRANT -DVERSION=\"$(VERSION)\" -DDarwin \
+CFLAGS=-Wno-comment -D$(MACHINE) -Wno-return-type -DLinux -D_REENTRANT -DVERSION=\"$(VERSION)\" -DDarwin \
 	-DLIB6 $(ALIGN_FUNCTIONS)  \
         $(DEBUG) $(CPU_OPTIMIZE) $(THREAD) -D$(XVERSION) \
 	-DGCC $(GCC3) \