Travis: Add LLVM 6.0.0 Linux job

.travis.yml

@@ -6,13 +6,16 @@ matrix:
   include:
     - os: linux
       d: ldc
+      env: LLVM_VERSION=6.0.0
+    - os: linux
+      d: ldc-beta
       env: LLVM_VERSION=5.0.1 OPTS="-DLIB_SUFFIX=64"
     - os: linux
       d: ldc
-      env: LLVM_VERSION=4.0.1 OPTS="-DLIB_SUFFIX=64"
+      env: LLVM_VERSION=4.0.1 OPTS="-DBUILD_SHARED_LIBS=ON"
     - os: linux
       d: ldc-beta
-      env: LLVM_VERSION=3.9.1 OPTS="-DBUILD_SHARED_LIBS=ON"
+      env: LLVM_VERSION=3.9.1 OPTS="-DBUILD_SHARED_LIBS=ON -DLIB_SUFFIX=64"
     - os: linux
       d: ldc-0.17.5
       env: LLVM_VERSION=3.8.1 OPTS="-DBUILD_SHARED_LIBS=OFF -DLIB_SUFFIX=64"
@@ -31,6 +34,7 @@ matrix:
 cache:
   directories:
     - llvm-spirv-6.0.0-5
+    - llvm-6.0.0
     - llvm-5.0.1
     - llvm-4.0.1
     - llvm-4.0.0

CMakeLists.txt

@@ -219,6 +219,11 @@ endif()
 append("${SANITIZE_CXXFLAGS}" LDC_CXXFLAGS)
 # LLVM_CXXFLAGS may contain -Werror which causes compile errors with dmd source
 string(REPLACE "-Werror " "" LLVM_CXXFLAGS ${LLVM_CXXFLAGS})
+# LLVM_CXXFLAGS may contain -Werror=unguarded-availability-new which requires
+# more recent gcc versions (not supported by 4.9)
+if(CMAKE_COMPILER_IS_GNUCXX)
+    string(REPLACE "-Werror=unguarded-availability-new " "" LLVM_CXXFLAGS ${LLVM_CXXFLAGS})
+endif()
 if (UNIX AND NOT "${LLVM_LDFLAGS}" STREQUAL "")
     # LLVM_LDFLAGS may contain -l-lld which is a wrong library reference (AIX)
     string(REPLACE "-l-lld " "-lld " LLVM_LDFLAGS ${LLVM_LDFLAGS})