Enable CI for nvptx64-nvidia-cuda

.travis.yml

@@ -186,6 +186,8 @@ matrix:
       if: branch = auto
     - env: IMAGE=mingw-check
       if: type = pull_request OR branch = auto
+    - env: IMAGE=nvptx-cuda
+      if: branch = auto
 
     - stage: publish toolstate
       if: branch = master AND type = push

src/ci/docker/dist-various-2/Dockerfile

@@ -70,6 +70,7 @@ ENV TARGETS=$TARGETS,x86_64-sun-solaris
 ENV TARGETS=$TARGETS,x86_64-unknown-linux-gnux32
 ENV TARGETS=$TARGETS,x86_64-unknown-cloudabi
 ENV TARGETS=$TARGETS,x86_64-fortanix-unknown-sgx
+ENV TARGETS=$TARGETS,nvptx64-nvidia-cuda
 
 ENV X86_FORTANIX_SGX_LIBS="/x86_64-fortanix-unknown-sgx/lib/"
 

src/ci/docker/nvptx-cuda/Dockerfile

@@ -0,0 +1,18 @@
+FROM ubuntu:18.04
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+    g++ make file curl ca-certificates python git \
+    cmake sudo gdb
+
+# TODO(denzp): setup `ptx-linker` CI for auttomatic binary releases.
+RUN curl -sL https://github.com/denzp/rust-ptx-linker/releases/download/v0.9.0-alpha/rust-ptx-linker.linux64.tar.gz | \
+    tar -xzvC /usr/bin
+
+COPY scripts/sccache.sh /scripts/
+RUN sh /scripts/sccache.sh
+
+ENV TARGETS=nvptx64-nvidia-cuda
+
+ENV SCRIPT python2.7 /checkout/x.py test --target $TARGETS \
+    src/test/run-make