travis: Don't install specific compilers

clang is already installed in travis' trusty environment

Should decrease build time quite a bit because we don't need to download
and compule libc++

.travis.yml

@@ -4,10 +4,6 @@ language: cpp
 
 env:
   global:
-    - LLVM_VERSION="3.8.1"
-    - LLVM_URL="http://llvm.org/releases/${LLVM_VERSION}/llvm-${LLVM_VERSION}.src.tar.xz"
-    - LIBCXX_URL="http://llvm.org/releases/${LLVM_VERSION}/libcxx-${LLVM_VERSION}.src.tar.xz"
-    - LIBCXXABI_URL="http://llvm.org/releases/${LLVM_VERSION}/libcxxabi-${LLVM_VERSION}.src.tar.xz"
     - JOBS=4
     - POLYBAR_BUILD_TYPE="compile"
 
@@ -39,9 +35,7 @@ addons:
   apt:
     sources:
       - ubuntu-toolchain-r-test
-      - llvm-toolchain-precise-3.8
     packages:
-      - clang-3.8
       - g++-5
       - gcc-5
       - i3-wm
@@ -64,7 +58,6 @@ addons:
 
 cache:
   directories:
-    - ${TRAVIS_BUILD_DIR}/deps/llvm-3.8.1/install
     - ${TRAVIS_BUILD_DIR}/deps/xcb-util-xrm
 
 install:
@@ -72,7 +65,6 @@ install:
   - mkdir -p "${DEPS_DIR}" && cd "${DEPS_DIR}"
   - source ${TRAVIS_BUILD_DIR}/common/travis/environment.sh
   - source ${TRAVIS_BUILD_DIR}/common/travis/install_xcb_xrm.sh
-  - source ${TRAVIS_BUILD_DIR}/common/travis/install_libcpp.sh
 
 before_script:
   - source ${TRAVIS_BUILD_DIR}/common/travis/summary.sh

common/travis/environment.sh

@@ -1,10 +1,8 @@
 #!/bin/bash
 # Update compiler flags
-if [ "${CXX:0:7}" = "clang++" ]; then
+if [ "${CXX}" = "clang++" ]; then
-  export CXX="clang++-3.8"
-  export CC="clang-3.8"
   export CXXFLAGS="${CXXFLAGS} -Qunused-arguments"
-elif [ "${CXX:0:3}" = "g++" ]; then
+elif [ "${CXX}" = "g++" ]; then
   export CXX="g++-5"
   export CC="gcc-5"
 fi

common/travis/install_libcpp.sh

@@ -1,20 +0,0 @@
-#!/bin/bash
-if [ "${CXX:0:7}" = "clang++" ]; then
-  LLVM_ROOT="${DEPS_DIR}/llvm-${LLVM_VERSION}"
-
-  if [ -z "$(ls -A "${LLVM_ROOT}/install/include" 2>/dev/null)" ]; then
-    mkdir -p "${LLVM_ROOT}" "${LLVM_ROOT}/build" "${LLVM_ROOT}/projects/libcxx" "${LLVM_ROOT}/projects/libcxxabi"
-
-    travis_retry wget -O - "${LLVM_URL}" | tar --strip-components=1 -xJ -C "${LLVM_ROOT}"
-    travis_retry wget -O - "${LIBCXX_URL}" | tar --strip-components=1 -xJ -C "${LLVM_ROOT}/projects/libcxx"
-    travis_retry wget -O - "${LIBCXXABI_URL}" | tar --strip-components=1 -xJ -C "${LLVM_ROOT}/projects/libcxxabi"
-
-    (cd "${LLVM_ROOT}/build" && cmake .. -DCMAKE_CXX_COMPILER="$CXX" -DCMAKE_C_COMPILER="$CC" -DCMAKE_INSTALL_PREFIX="${LLVM_ROOT}/install" -DCMAKE_BUILD_TYPE=$BUILD_TYPE)
-    (cd "${LLVM_ROOT}/build/projects/libcxx" && make install)
-    (cd "${LLVM_ROOT}/build/projects/libcxxabi" && make install)
-  fi
-
-  export CXXFLAGS="${CXXFLAGS} -I ${LLVM_ROOT}/install/include/c++/v1"
-  export LDFLAGS="${LDFLAGS} -L ${LLVM_ROOT}/install/lib -lc++ -lc++abi"
-  export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${LLVM_ROOT}/install/lib"
-fi