Add emscripten build targets for Linux on CircleCI 2.0. Closes GH-37 (#71)

Author: satoshinm

.circleci/config.yml

@@ -0,0 +1,39 @@
+version: 2
+jobs:
+    build:
+        docker:
+            - image: buildpack-deps:xenial
+        working_directory: ~/NetCraft
+        steps:
+            - checkout
+            - run: 
+                name: Setup dependencies
+                command: |
+                  apt update
+                  apt install -y cmake libglew-dev xorg-dev libcurl4-openssl-dev
+                  apt install -y libglfw3-dev
+                  mkdir native-build
+                  (cd native-build && cmake ..)
+                  # http://kripken.github.io/emscripten-site/docs/getting_started/downloads.html#platform-notes-installation-instructions-portable-sdk
+                  apt install -y python2.7
+                  apt install -y nodejs
+                  apt install -y default-jre
+                  wget https://s3.amazonaws.com/mozilla-games/emscripten/releases/emsdk-portable.tar.gz
+                  tar xf emsdk-portable.tar.gz -C ~
+                  ~/emsdk-portable/emsdk update
+                  ~/emsdk-portable/emsdk install latest
+                  ~/emsdk-portable/emsdk activate latest
+                  source ~/emsdk-portable/emsdk_env.sh
+                  mkdir release-build-js
+                  (cd release-build-js && cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE=$EMSCRIPTEN/cmake/Modules/Platform/Emscripten.cmake ..)
+                  mkdir wasm-build
+                  (cd wasm-build && cmake -DWASM=1 -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE=$EMSCRIPTEN/cmake/Modules/Platform/Emscripten.cmake ..)
+            - run:
+                name: native-build
+                command: cd native-build && make
+            - run:
+                name: release-build-js
+                command: cd release-build-js && source ~/emsdk-portable/emsdk_env.sh && make
+            - run:
+                name: wasm-build
+                command: cd wasm-build && source ~/emsdk-portable/emsdk_env.sh && make

CMakeLists.txt

@@ -69,21 +69,20 @@ else ()
     set(CURL_LIBRARIES "")
 endif ()
 
-find_package(OpenGL REQUIRED)
-
 if(APPLE OR EMSCRIPTEN)
     target_link_libraries(craft glfw
-        ${OPENGL_gl_LIBRARY}
         ${GLFW_LIBRARIES} ${CURL_LIBRARIES})
 endif()
 
 if(UNIX AND NOT EMSCRIPTEN)
+    find_package(OpenGL REQUIRED)
     target_link_libraries(craft dl glfw
         ${OPENGL_gl_LIBRARY}
         ${GLFW_LIBRARIES} ${CURL_LIBRARIES})
 endif()
 
 if(MINGW OR MSVC)
+    find_package(OpenGL REQUIRED)
     target_link_libraries(craft ws2_32.lib glfw
         ${OPENGL_gl_LIBRARY}
         ${GLFW_LIBRARIES} ${CURL_LIBRARIES})

README.md

@@ -102,10 +102,10 @@ the installation:
 
     brew install cmake
 
-#### Linux (Ubuntu)
+#### Linux (Ubuntu 16.04.2 LTS)
 
-    sudo apt-get install cmake libglew-dev xorg-dev libcurl4-openssl-dev
-    sudo apt-get build-dep glfw
+    sudo apt install cmake libglew-dev xorg-dev libcurl4-openssl-dev
+    sudo apt install libglfw3-dev
 
 #### Windows