Add C/C++ Hello World with Makefile, CMake, and Bazel

demo/hello_bazel/.gitignore

@@ -0,0 +1,2 @@
+examples
+occlum_workspace

demo/hello_bazel/README.md

@@ -0,0 +1,23 @@
+# C++ Sample Project with Bazel
+
+This project demonstrates how to use Bazel to build C++ projects for Occlum. To install Bazel on Ubuntu, follow the instructions [here](https://docs.bazel.build/versions/master/install-ubuntu.html).
+
+1. Download a Bazel sample project in C++ and build it with Occlum toolchain
+```
+./build_bazel_sample.sh
+```
+When completed, the resulting `hello-world` can be found in `examples/cpp-tutorial/stage3/bazel-bin/main` directory.
+
+2. (Optional) Run `hello-world` on Linux
+```
+LD_LIBRARY_PATH=/usr/local/occlum/x86_64-linux-musl/lib ./examples/cpp-tutorial/stage3/bazel-bin/main/hello-world
+```
+
+3. Run `hello-world` on Occlum
+```
+mkdir occlum_workspace && cd occlum_workspace
+occlum init
+cp ../examples/cpp-tutorial/stage3/bazel-bin/main/hello-world image/bin
+occlum build
+occlum run /bin/hello-world
+```

demo/hello_bazel/build_bazel_sample.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+set -e
+
+mkdir examples
+cd examples
+git clone https://github.com/bazelbuild/examples/ .
+cd cpp-tutorial/stage3
+export CC=/opt/occlum/toolchains/gcc/bin/occlum-gcc
+export CXX=/opt/occlum/toolchains/gcc/bin/occlum-g++
+bazel build --cxxopt=-std=c++11 --copt=-fPIC --linkopt=-pie //main:hello-world

demo/hello_c/.gitignore

@@ -1,2 +1,3 @@
 hello_world
+build
 occlum_workspace

demo/hello_c/CMakeLists.txt

@@ -0,0 +1,6 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+PROJECT(HELLO_WORLD LANGUAGES C VERSION 0.0.1)
+SET(SRC_LIST "hello_world.c")
+MESSAGE(STATUS "This is BINARY dir " ${HELLO_WORLD_BINARY_DIR})
+MESSAGE(STATUS "This is SOURCE dir " ${HELLO_WORLD_SOURCE_DIR})
+ADD_EXECUTABLE(hello_world ${SRC_LIST})

demo/hello_c/Makefile

@@ -0,0 +1,12 @@
+CC := occlum-gcc
+CFLAGS := -fPIC -pie
+
+.PHONY: all clean
+
+all: hello_world
+
+hello_world: hello_world.c
+	$(CC) $(CFLAGS) $^ -o $@
+
+clean:
+	rm -rf hello_world

demo/hello_c/README.md

@@ -0,0 +1,31 @@
+# C Sample Project with Makefile and CMake
+
+This project demonstrates how to use Makefile/CMake to build C projects for Occlum.
+
+1. Build `hello_world` with Makefile
+```
+make
+```
+Or you can build `hello_world` with CMake
+```
+mkdir build && cd build
+cmake ../ -DCMAKE_C_COMPILER=occlum-gcc -DCMAKE_C_FLAGS="-fPIC -pie"
+make
+cd ..
+cp build/hello_world .
+```
+Either way, the resulting `hello_world` can be found in the current directory.
+
+2. (Optional) Run `hello_world` on Linux
+```
+./hello_world
+```
+
+3. Run `hello_world` on Occlum
+```
+mkdir occlum_workspace && cd occlum_workspace
+occlum init
+cp ../hello_world image/bin
+occlum build
+occlum run /bin/hello_world
+```

demo/hello_cc/.gitignore

@@ -0,0 +1,3 @@
+hello_world
+build
+occlum_workspace

demo/hello_cc/CMakeLists.txt

@@ -0,0 +1,7 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 3.5)
+SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+PROJECT(HELLO_WORLD LANGUAGES CXX VERSION 0.0.1)
+SET(SRC_LIST "hello_world.cc")
+MESSAGE(STATUS "This is BINARY dir " ${HELLO_WORLD_BINARY_DIR})
+MESSAGE(STATUS "This is SOURCE dir " ${HELLO_WORLD_SOURCE_DIR})
+ADD_EXECUTABLE(hello_world ${SRC_LIST})

demo/hello_cc/Makefile

@@ -0,0 +1,12 @@
+CXX := occlum-g++
+CXXFLAGS := -std=c++11 -fPIC -pie
+
+.PHONY: all clean
+
+all: hello_world
+
+hello_world: hello_world.cc
+	$(CXX) $(CXXFLAGS) $^ -o $@
+
+clean:
+	rm -rf hello_world

demo/hello_cc/README.md

@@ -0,0 +1,31 @@
+# C++ Sample Project with Makefile and CMake
+
+This project demonstrates how to use Makefile/CMake to build C++ projects for Occlum.
+
+1. Build `hello_world` with Makefile
+```
+make
+```
+Or you can build `hello_world` with CMake
+```
+mkdir build && cd build
+cmake ../ -DCMAKE_CXX_COMPILER=occlum-g++ -DCMAKE_CXX_FLAGS="-fPIC -pie"
+make
+cd ..
+cp build/hello_world .
+```
+Either way, the resulting `hello_world` can be found in the current directory.
+
+2. (Optional) Run `hello_world` on Linux
+```
+LD_LIBRARY_PATH=/usr/local/occlum/x86_64-linux-musl/lib ./hello_world
+```
+
+3. Run `hello_world` on Occlum
+```
+mkdir occlum_workspace && cd occlum_workspace
+occlum init
+cp ../hello_world image/bin
+occlum build
+occlum run /bin/hello_world
+```

demo/hello_cc/hello_world.cc

@@ -0,0 +1,6 @@
+#include <iostream>
+
+int main() {
+    std::cout << "Hello World" << std::endl;
+    return 0;
+}

demo/hello_world/Makefile

@@ -1,26 +0,0 @@
-CC := occlum-gcc
-CFLAGS := -fPIC -pie
-
-.PHONY: all test test-native clean
-
-all: hello_world
-
-hello_world: hello_world.c
-	$(CC) $(CFLAGS) $^ -o $@
-
-# Run hello_world on Occlum inside an SGX enclave
-test: hello_world
-	rm -rf occlum_workspace
-	mkdir occlum_workspace
-	cd occlum_workspace && \
-		occlum init && \
-		cp ../hello_world image/bin && \
-		occlum build && \
-		occlum run /bin/hello_world
-
-# Run hello_world on the native OS (e.g., Linux)
-test-native:
-	./hello_world
-
-clean:
-	rm -rf hello_world occlum_workspace

tools/docker/Dockerfile

@@ -12,6 +12,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         curl \
         debhelper \
         expect \
+        g++ \
         gdb \
         git-core \
         jq \
@@ -31,10 +32,13 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         pkg-config \
         protobuf-compiler \
         python \
+        python-pip \
         sudo \
+        unzip \
         uuid-dev \
         vim \
         wget \
+        zip \
         && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*