g++ #include file not found compiler error - c++

Question

I'm currently trying to simply link a file called main.cpp with boost in order to do asio(asynchronous input and output). I'm using a makefile in order to compile the C++ code into executable form. However, despite using the -I modifier on my terminal command in Mac OS X, it still cannot find the appropriate directory to search in. Here is my code in Main
#include <asio.hpp>
int main(){
return 1;
}
and here is the makefile command that I am using
all:
g++ -Iboost_1_60_0/boost/ -o main main.cpp
In my file structure, boost_1_60_0, main.cpp, and makefile are all on the top level, where asio is in the folder boost which is in the folder boost_1_60_0. I'm very confused about this and any help would be appreciated! Thanks!
EDIT: Full error is
1 error generated.
make: *** [all] Error 1
iMats-2:SerialC++ wfehrnstrom$ make
g++ -Iboost_1_60_0 -o main main.cpp
main.cpp:2:10: fatal error: 'asio.hpp' file not found

Answer 1

You should use -Iboost_1_60_0 (or, better still, install Boost properly so that it's found automatically under /usr/include/), and write #include <boost/asio.hpp>.
The include directives inside Boost itself will assume this form, so…
BTW, this has nothing to do with exceptions. Presumably it's a compiler error you've seen.