Another attempt of getting Travis CI to work.

.gitignore

@@ -2,10 +2,8 @@
 *.sw*
 .DS_Store
 
-# Build tools.
-build/ninja
-build/llvm
-build/llvm-build/
+# Build infrastracture.
+build/
 
 # Build products.
 out/

.gitmodules

@@ -25,3 +25,6 @@
 [submodule "deps/googletest"]
 	path = deps/googletest
 	url = https://chromium.googlesource.com/external/googletest
+[submodule "deps/cmake"]
+	path = deps/cmake
+	url = https://cmake.org/cmake.git

.travis.yml

@@ -1,13 +1,43 @@
-language: cpp
 sudo: false
-compiler: gcc
+# sudo: required
+os: linux
+# dist: trusty
+language: generic
+addons:
+  apt:
+    sources:
+      - llvm-toolchain-precise-3.7
+      - ubuntu-toolchain-r-test
+    packages:
+      - clang-3.7
+      - g++-5
+
+env:
+  global:
+    - CC=clang-3.7
+    - CXX=clang++-3.7
+  matrix:
+    #    - BUILD=Debug
+    - BUILD=Release
+
+install:
+  # Check baseline memory usage; useful to know when OOMs occur
+  - free
+  - vmstat
+  - ps aux --sort=-rss | head -n 10
+
+  # Run the scripts in scripts/deps/all.sh one at a time. This buys a little
+  # time, as Travis limits each step here to 50 minutes.
+  - ./scripts/deps/setup.sh
+  - ./scripts/deps/ninja.sh
+  - ./scripts/deps/cmake.sh
+  - ./scripts/deps/llvm.sh
+
 before_script:
-  - ./build/deps.sh
   - ./build/run_gyp.sh
-env:
-  - BUILD=Debug
-  - BUILD=Release
-script: ./build/ninja -C out/$BUILD &&
-    ./out/$BUILD/bare_tests &&
-    ./out/$BUILD/crypto_tests &&
-    ./out/$BUILD/monitor_tests
+
+script:
+  - ./build/ninja -C out/$BUILD
+  - ./out/$BUILD/bare_tests
+  - ./out/$BUILD/crypto_tests
+  - ./out/$BUILD/monitor_tests

README.md

@@ -10,7 +10,7 @@ RISC V processor.
 ### One-Time Setup
 
 ```bash
-./build/deps.sh
+./scripts/deps/all.sh
 ./build/run_gyp.sh
 ```
 

scripts/deps/all.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+#
+# Sets up the build system dependencies.
+
+set -o errexit  # Stop the script on the first error.
+set -o nounset  # Catch un-initialized variables.
+
+# NOTE: All the scripts below also need to be listed in .travis.yml
+#       We cannot call all.sh directly in .travis.yml, because that would
+#       exceed the 50-minute time limit for a single build step.
+
+./scripts/deps/setup.sh
+./scripts/deps/ninja.sh
+./scripts/deps/cmake.sh
+./scripts/deps/llvm.sh

scripts/deps/cmake.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+#
+# Builds and symlinks CMake.
+
+set -o errexit  # Stop the script on the first error.
+set -o nounset  # Catch un-initialized variables.
+
+mkdir -p build/cmake-build
+cd build/cmake-build
+../../deps/cmake/bootstrap
+make
+
+cd ../..
+rm -f build/cmake
+ln -s "$PWD/build/cmake-build/bin/cmake" build/

scripts/deps/llvm.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+#
+# Builds and symlinks LLVM.
+
+set -o errexit  # Stop the script on the first error.
+set -o nounset  # Catch un-initialized variables.
+
+mkdir -p build/llvm-build
+cd build/llvm-build
+
+# NOTE: CMake's ninja generator barfs if it can't find ninja on the path.
+PATH="$PATH:$PWD/../" ../cmake -G "Ninja" \
+    -DCMAKE_BUILD_TYPE:STRING=RelWithDebInfo \
+    -DLLVM_ENABLE_RTTI:BOOL=ON \
+    -DLLVM_INCLUDE_EXAMPLES:BOOL=OFF \
+    -DLLVM_INCLUDE_TESTS:BOOL=OFF \
+    -DLLVM_EXTERNAL_CLANG_SOURCE_DIR:PATH="$PWD/../../deps/clang" \
+    ../../deps/llvm
+../ninja
+
+cd ../..
+rm -f build/llvm
+ln -s "$PWD/build/llvm-build/Release+Debug+Asserts/" build/llvm

scripts/deps/ninja.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+#
+# Builds and symlinks Ninja.
+
+set -o errexit  # Stop the script on the first error.
+set -o nounset  # Catch un-initialized variables.
+
+# NOTE: Ninja really wants to be built inside its source tree.
+cd deps/ninja
+
+./configure.py --bootstrap
+rm -f null.o  # NOTE: This gets created for some weird reason.
+
+cd ../..
+rm -f build/ninja
+ln -s "$PWD/deps/ninja/ninja" build/ninja

scripts/deps/setup.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+#
+# Project-specific setup.
+
+set -o errexit  # Stop the script on the first error.
+set -o nounset  # Catch un-initialized variables.
+
+# Check out all the build dependencies stored in Git submodules.
+git submodule update --init
+
+# Symlink build scripts in the build directory.
+mkdir -p build/
+ln -s "$PWD/scripts/run_gyp.sh" build/run_gyp.sh

src/common.gypi

@@ -1,6 +1,6 @@
 {
   'variables': {
-    'clang': 'build/llvm-build/Release+Debug+Asserts/bin',
+    'clang': 'build/llvm-build/bin',
     'library': 'static_library',
     'mac_sdk': '10.11',
     'mac_deployment_target': '10.7',