Enable LTO on Linux builds, general Travis fixes

.travis.yml

@@ -1,7 +1,7 @@
 language: cpp
 env:
   global:
-  - INSTALL_DIR="sfizz-$(git describe --tags)-${TRAVIS_OS_NAME}-${TRAVIS_CPU_ARCH}"
+  - INSTALL_DIR="sfizz-${TRAVIS_BRANCH}-${TRAVIS_OS_NAME}-${TRAVIS_CPU_ARCH}"
 
 jobs:
   include:

.travis/before_install.sh

@@ -6,14 +6,14 @@ cmake_dir="cmake-3.13.0-${TRAVIS_OS_NAME}-${TRAVIS_CPU_ARCH}"
 cmake_arc="${cmake_dir}.tar.gz"
 cmake_url="https://github.com/sfztools/cmake/releases/download/${TRAVIS_OS_NAME}/${cmake_arc}"
 
-if [ ${TRAVIS_OS_NAME} = "linux" ]; then
+if [[ ${TRAVIS_OS_NAME} == "linux" ]]; then
   wget -q ${cmake_url}
   tar xzf ${cmake_arc}
   cd ${TRAVIS_BUILD_DIR}/${cmake_dir}
   sudo cp    bin/*   /usr/local/bin/
   sudo cp -r share/* /usr/local/share/
   export PATH="/usr/local/bin:$PATH" # FIXME
-elif [ ${TRAVIS_OS_NAME} = "osx" ]; then
+elif [[ ${TRAVIS_OS_NAME} == "osx" ]]; then
   sudo ln -s /usr/local /opt/local
   brew update
   brew upgrade cmake

.travis/install.sh

@@ -2,7 +2,7 @@
 
 set -ex
 
-if [ "$TRAVIS_OS_NAME" = "linux" ]; then
+if [[ ${TRAVIS_OS_NAME} == "linux" ]]; then
   sudo apt-get install libasound2-dev libjack-jackd2-dev libsndfile1-dev lv2-dev
 
   sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 100

.travis/script.sh

@@ -3,13 +3,13 @@
 set -ex
 
 mkdir -p build/${INSTALL_DIR} && cd build
+/usr/local/bin/cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX:PATH=${PWD}/${INSTALL_DIR} ..
 
 if [[ ${TRAVIS_OS_NAME} == "linux" ]]; then
-  # FIXME: lto error in build when enabled
-  /usr/local/bin/cmake -DCMAKE_BUILD_TYPE=Release -DENABLE_LTO=OFF -DCMAKE_INSTALL_PREFIX:PATH=${PWD}/${INSTALL_DIR} ..
+
   make -j$(nproc)
 elif [[ ${TRAVIS_OS_NAME} == "osx" ]]; then
-  /usr/local/bin/cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX:PATH=${PWD}/${INSTALL_DIR} ..
+
   make -j$(sysctl -n hw.ncpu)
 
 # Xcode not currently supported, see https://gitlab.kitware.com/cmake/cmake/issues/18088

.travis/update_dox.sh

@@ -3,7 +3,9 @@
 set -x # No fail, we need to go back to the original branch at the end
 
 # Build documentation only from Linux x86_64 builds
-if [[ ${TRAVIS_CPU_ARCH} != "amd64" ]]; then exit 0; fi
+if [[ ${TRAVIS_CPU_ARCH} != "amd64" && ${TRAVIS_OS_NAME} != "linux" ]]; then
+  exit 0
+fi
 
 doxygen Doxyfile
 git fetch --depth=1 https://github.com/${TRAVIS_REPO_SLUG}.git refs/heads/gh-pages:refs/remotes/origin/gh-pages