Add libc++ and MSAN builders to to travis.

This patch adds three new build configurations to the travis CI.

* Clang 3.8 w/ libc++
* Clang 3.8 w/ libc++, UBSAN, ASAN
* Clang 3.8 w/ libc++, MSAN

.travis-libcxx-setup.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+# Install a newer CMake version
+curl -sSL https://cmake.org/files/v3.6/cmake-3.6.1-Linux-x86_64.sh -o install-cmake.sh
+chmod +x install-cmake.sh
+sudo ./install-cmake.sh --prefix=/usr/local --skip-license
+
+# Checkout LLVM sources
+git clone --depth=1 https://github.com/llvm-mirror/llvm.git llvm-source
+git clone --depth=1 https://github.com/llvm-mirror/libcxx.git llvm-source/projects/libcxx
+git clone --depth=1 https://github.com/llvm-mirror/libcxxabi.git llvm-source/projects/libcxxabi
+
+# Build and install libc++ (Use unstable ABI for better sanitizer coverage)
+mkdir llvm-build && cd llvm-build
+cmake -DCMAKE_C_COMPILER=${C_COMPILER} -DCMAKE_CXX_COMPILER=${COMPILER} \
+      -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr \
+      -DLIBCXX_ABI_UNSTABLE=ON \
+      -DLLVM_USE_SANITIZER=${LIBCXX_SANITIZER} \
+      ../llvm-source
+make cxx -j2
+sudo make install-libcxxabi install-libcxx
+cd ../

.travis.yml

@@ -2,11 +2,19 @@ sudo: required
 dist: trusty
 language: cpp
 
+env:
+  global:
+    - /usr/local/bin:$PATH
+
 # NOTE: The COMPILER variable is unused. It simply makes the display on
 # travis-ci.org more readable.
 matrix:
     include:
         - compiler: gcc
+          addons:
+            apt:
+              packages:
+                - lcov
           env: COMPILER=g++ C_COMPILER=gcc       BUILD_TYPE=Coverage
         - compiler: gcc
           env: COMPILER=g++ C_COMPILER=gcc       BUILD_TYPE=Debug
@@ -26,6 +34,7 @@ matrix:
           env: COMPILER=clang++ C_COMPILER=clang BUILD_TYPE=Debug
         - compiler: clang
           env: COMPILER=clang++ C_COMPILER=clang BUILD_TYPE=Release
+        # Clang w/ libc++
         - compiler: clang
           addons:
             apt:
@@ -33,11 +42,34 @@ matrix:
                 clang-3.8
           env:
             - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
-            - EXTRA_FLAGS="-fno-omit-frame-pointer -g -O2 -fsanitize=undefined,address -fno-sanitize-recover=all"
+            - LIBCXX_BUILD=1
+            - EXTRA_FLAGS="-stdlib=libc++"
+        # Clang w/ libc++, ASAN, UBSAN
+        - compiler: clang
+          addons:
+            apt:
+              packages:
+                clang-3.8
+          env:
+            - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
+            - LIBCXX_BUILD=1 LIBCXX_SANITIZER="Undefined;Address"
+            - EXTRA_FLAGS="-stdlib=libc++ -fno-omit-frame-pointer -g -O2 -fsanitize=undefined,address -fno-sanitize-recover=all"
             - UBSAN_OPTIONS=print_stacktrace=1
-
+        # Clang w/ libc++ and MSAN
+        - compiler: clang
+          addons:
+            apt:
+              packages:
+                clang-3.8
+          env:
+            - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
+            - LIBCXX_BUILD=1 LIBCXX_SANITIZER=MemoryWithOrigins
+            - EXTRA_FLAGS="-stdlib=libc++ -g -O2 -fno-omit-frame-pointer -fsanitize=memory -fsanitize-memory-track-origins"
 
 before_script:
+    - if [ -n "${LIBCXX_BUILD}" ]; then
+        source .travis-libcxx-setup.sh;
+      fi
     - mkdir build && cd build
 
 install:
@@ -48,7 +80,7 @@ install:
     fi
 
 script:
-    - cmake .. -DCMAKE_C_COMPILER=${C_COMPILER} -DCMAKE_CXX_COMPILER=${COMPILER} -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCMAKE_CXX_FLAGS="${EXTRA_FLAGS}"
+    - cmake -DCMAKE_C_COMPILER=${C_COMPILER} -DCMAKE_CXX_COMPILER=${COMPILER} -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCMAKE_CXX_FLAGS="${EXTRA_FLAGS}" ..
     - make
     - make CTEST_OUTPUT_ON_FAILURE=1 test