ctime std:: namespace conflict - c++

Question

I have project with many C and C++ files. I try to add thread-safe queue.
In my header:
#include <queue>
#include <mutex>
#include <thread>
#include <condition_variable>
// Some code..
When I try to compile this, its fault with this errors:
In file included from /usr/include/c++/4.9/chrono:41:0,
from /usr/include/c++/4.9/mutex:39,
from queue.hpp:4,
from main.cpp:24:
/usr/include/c++/4.9/ctime:60:11: error: '::clock_t' has not been declared
using ::clock_t;
/usr/include/c++/4.9/condition_variable:161:23: error: 'time_t' in namespace 'std' does not name a type
static_cast<std::time_t>(__s.time_since_epoch().count()),
As I understand it, compiler try to find std::time_*, but why? And how fix it?
Thanks!
UPD: main.cpp
#include "gpu.hpp" //Error here
int main(int argc, char const *argv[]) {
return 0;
}
gpu.hpp
#pragma once
#include "filter.hpp"
#include "queue.hpp" //Error here
#include <nvcuvid.h>
#include <avformat.h>
#include <vector>
queue.hpp
#pragma once
#include <queue>
#include <mutex>
#include <thread>
#include <condition_variable>
template<typename T>
class CQueue
{
std::queue<T> m_queue;
std::mutex m_mutex;
std::condition_variable m_cond;
// ...
First error message:
In file included from queue.hpp:3:0,
from gpu.hpp:3,
from main-test.cpp:2:
/usr/include/c++/4.9/ctime:60:11: error: '::clock_t' has not been declared
using ::clock_t;
Makefile:
FFMPEG_INCLUDES := -I$(FFMPEG_PATH) $(FFMPEG_PATH)/libavutil ...
$(OBJECTS_DIRS)/app-main-test.o: src/app/main-test.cpp
$(CXX) $(CXXFLAGS) $(FFMPEG_INCLUDES) $(CUDA_INCLUDES) -o $# -c $<

Answer 1

The problem was in my Makefile.
I has include path to each ffmpeg folder. FFMPEG_INCLUDES := -I$(FFMPEG_PATH) $(FFMPEG_PATH)/libavutil ... FFMPEG have time.c in ffmpeg/libavutil It causes conflict with ctime.
I replaced #include <log.h> to #include<libavutil/log.h> and fixed include path in makefile FFMPEG_INCLUDES := -I$(FFMPEG_PATH)
Thank you #user2807083 for help.