Cannot make a successful pass in travis-ci for my C++ app - c++

Question

I am working on this project an it compiles fine in my desktop using g++ (Ubuntu 4.8.4-2ubuntu1~14.04) 4.8.4 and cmake version 2.8.12.2.
I am new in travis-ci thing, I have wrote a .travis.yml script as follow
language: cpp
compiler:
- g++
addons:
apt:
sources:
- ubuntu-toolchain-r-test
packages:
- gcc-4.8
- g++-4.8
- libboost-all-dev
- cmake
install:
- if [ "$CXX" = "g++" ]; then export CXX="g++-4.8 -std=c++11 -I/usr/include/boost -DENABLE_REINFORCEMENT_LEARNING" CC="gcc-4.8"; fi
before_script:
- mkdir build
- cd build
- cmake ..
script: make
My project has boost library dependency.
My problem is the travis-ci indicates compiler error in my timer variable.
#include "stdafx.hpp"
#include <list>
#include <mutex>
#include <atomic>
#include <thread>
#include <fstream>
#include <sstream>
#include <signal.h>
#include <iostream>
#include <functional>
#include "timer.hpp"
#include "configs.hpp"
#include "incurses.hpp"
#include "quadrotor.hpp"
#include "main.helper.hpp"
#include "main.output.hpp"
#ifdef ENABLE_REINFORCEMENT_LEARNING
# include "RLearner.Sarsa.hpp"
#endif
volatile bool
sig_ctrl_c = false;
std::mutex log_lock;
> timer screener; <
// /home/travis/build/noise2/quadrotor-sim/main.cpp:27:1: error: ‘timer’ does not name a type
// timer screener;
scalar iter_simulation = 0;
const size_t max_iter_simulation = 1e+5;
You can see the travis-ci result here.
Quesions
1) Why on earth this is an error when I have a successful compile in my desktop? [i.e, what am i doing wrong?]
2) How to make my project pass the travis-ci?
Edit
Note that class timer has been included already.

Answer 1

Thanks to #nfranklin I have noticed what was the problem. For what it worth to solve the problem I had to install one of the latest boost version, I came up with following travis.yml script.
language: cpp
compiler:
- g++
addons:
apt:
sources:
- ubuntu-toolchain-r-test
- boost-latest
packages:
- gcc-4.8
- g++-4.8
- libboost1.55-all-dev
- cmake
install:
- if [ "$CXX" = "g++" ]; then export CXX="g++-4.8 -std=c++11 -DENABLE_REINFORCEMENT_LEARNING" CC="gcc-4.8"; fi
before_script:
- mkdir build
- cd build
- cmake ..
script: make
Now it is all good :)

Answer 2

I think the problem lies within the following step in your travis-ci config file:
install:
- if [ "$CXX" = "g++" ]; then export CXX="g++-4.8 -std=c++11 -I/usr/include/boost -DENABLE_REINFORCEMENT_LEARNING" CC="gcc-4.8"; fi
timer.hpp is being included from boost (i.e. boost/timer.hpp) due to -I/usr/include/boost instead ofthe timer.hpp that you wrote.
You can remove the -I/usr/include/boost from that step . /usr/include is automatically searched for headers by gcc and and so the boost headers that you include (e.g. #include ) will be found.