clang++ can not locate c++ header and library - c++

Question

My OS is OS X 10.10.2 and the default compiler for C is clang.
But this version of clang does not support ubsan (undefined sanitizer) which comes in the 3.4 release of clang. I also want to use KLEE to do some analysis. AFAIK KLEE works well with LLVM-<=3.4. I decided to install
llvm-3.4 and clang-3.4 in my laptop.
After installing clang-3.4 in my system, I encountered a issue that the compiler can not locate the c++ header file. I installed clang-3.4 in /usr/local and I can find the c++ header file in /usr/local/include/c++/4.8.4. How can I add this directory to the search path of clang-3.4 and also the c++ library?
for the following demo code:
#include <iostream>
using namespace std;
int main(){
cout<<"Hellow World\n";
return 0;
}
When I compile it using command clang++ test.cpp, I got the error
test1.cpp:1:10: fatal error: 'iostream' file not found
#include <iostream>
^
1 error generated.
Below is the version of clang I used
clang version 3.4 (tags/RELEASE_34/final)
Target: x86_64-apple-darwin14.1.0
Thread model: posix
I used the following shell command to install llvm-3.4 and clang-3.4:
wget http://llvm.org/releases/3.4/llvm-3.4.src.tar.gz \
http://llvm.org/releases/3.4/clang-3.4.src.tar.gz \
http://llvm.org/releases/3.4/clang-tools-extra-3.4.src.tar.gz \
http://llvm.org/releases/3.4/compiler-rt-3.4.src.tar.gz
tar zxf llvm-3.4.src.tar.gz
tar zxf clang-3.4.src.tar.gz -C llvm-3.4/tools
mv llvm-3.4/tools/clang{-3.4,}
tar zxf clang-tools-extra-3.4.src.tar.gz -C llvm-3.4/tools/clang/tools
mv llvm-3.4/tools/clang/tools/{clang-tools-extra-3.4,extra}
tar zxf compiler-rt-3.4.src.tar.gz -C llvm-3.4/projects
mv llvm-3.4/projects/compiler-rt{-3.4,}
cd llvm-3.4
./configure --enable-cxx11 \
--enable-bindings=none --enable-shared \
--enable-debug-symbols --enable-optimized
make
make install
Now I have two versions of clang in my OS, one is the default one shipped with OSX located in /usr/bin and the other is clang-3.4 located in /usr/local/bin. The previous one can find the C++ header file while the latter can not.

Answer 1

Did you read the user documentation of clang notably the section on command line options ? BTW, current (march 2015) version of clang is 3.6!
For C++ code you should use the clang++ command, not the clang command.
You might pass -I and -L options to clang++ but you might perhaps have misinstalled your clang compiler.
You should be aware of the -v and -H options of clang or clang++ ; they could be useful, at least to understand more your issue.
addenda
BTW, a program reported to work with Clang 3.4 is extremely likely to work with a more modern version, like Clang 3.5 or 3.6
You probably have a PATH issue; you should have configure -d your Clang-3.4 & LLvm-3.4 programs with --program-suffix=-my-3.4 (if you do that, repeat your entire compiler build and installation) and you probably should run /usr/local/bin/clang++-my-3.4 ; maybe you also need some --with-gcc-toolchain additional configure option.
I'm pretty sure that you should be able to try to compile or use your mysterious software requiring Clang-3.4 with a more modern version like 3.5 or 3.6 ; your MacOSX 10.10.2 is rumored to have a Clang-3.5 based system compiler, it very probably is able to compile and work with your mysterious software.