How about c++17?

CMakeLists.txt

 cmake_minimum_required(VERSION 2.6)
   project(systemc-clang)
-  # Use C++ standard version to c++14
-  set(CMAKE_CXX_STANDARD 14)
+  # Use C++ standard version to c++17
+  set(CMAKE_CXX_STANDARD 17)
   # Always keep it on
   set(CMAKE_CXX_STANDARD_REQUIRED ON)
 

paths.sh

@@ -25,11 +25,11 @@ LLVMCONFIG=$LLVM_BUILD_DIR/bin/llvm-config
 # Alternatively, you can use gcc and g++, but some flags don't work.
 export CC=clang
 export CXX=clang++
-export LLVM_CXX_FLAGS=`$LLVMCONFIG --cxxflags`
+export LLVM_CXX_FLAGS="`$LLVMCONFIG --cxxflags` -fno-aligned-allocation"
 
 # Generate all the flags.
 export LLVM_CXX_FLAGS="$LLVM_CXX_FLAGS -fvisibility-inlines-hidden"
-export LLVM_LIBS=`$LLVMCONFIG --libs` 
+export LLVM_LIBS=`$LLVMCONFIG --libs`
 export LLVM_LD_FLAGS=`$LLVMCONFIG --ldflags`
 export LLVM_LD_FLAGS=`echo $LLVM_LD_FLAGS | sed 's/ *$//g'`
 

scripts/paths.fish

@@ -28,7 +28,8 @@ set -x CXX clang++
 set -x LLVM_CXX_FLAGS (eval $LLVMCONFIG --cxxflags)
 
 # Generate all the flags.
-set -x LLVM_CXX_FLAGS "$LLVM_CXX_FLAGS -fvisibility-inlines-hidden -faligned-allocation"
+# -fno-aligned-allocation needed for c++17
+set -x LLVM_CXX_FLAGS "$LLVM_CXX_FLAGS -fvisibility-inlines-hidden -fno-aligned-allocation"
 set -x LLVM_LIBS (eval $LLVMCONFIG --libs)
 set -x LLVM_LD_FLAGS (eval $LLVMCONFIG --ldflags)
 set -x LLVM_LD_FLAGS (echo $LLVM_LD_FLAGS | sed 's/ *$//g')