fixed tests under gcc

tests/Makefile

 CXX	?= g++
 CXXFLAGS	=  -D_WIN32_WINNT=0x600 -march=native -Wall -Wextra -Wshadow -pedantic -std=c++11 -pthread -Wl,--no-as-needed  -I../include 
+LDPFALGS = -pthread
+
+CPP_FILES := $(wildcard *.cpp)
+OBJ_FILES := $(addprefix ./,$(notdir $(CPP_FILES:.cpp=.o)))
+
+
+tests: $(OBJ_FILES)
+	$(CXX) $(CXXFLAGS) $(LDPFALGS) -o $@ $^
+
+%.o: %.cpp
+	g++ $(CXXFLAGS) -c -o $@ $<
 
-all: %.cpp
-    $(CXX) $^ -o tests $(CXXFLAGS) $(CXX_RELEASE_FLAGS)    
 clean:
-    rm -f tests *.o logs/*     
+	rm -f tests *.o logs/*     
  
 rebuild: clean all
 

tests/file_log.cpp

@@ -4,7 +4,7 @@ static std::string file_contents(const std::string& filename)
 {
     std::ifstream ifs(filename);
     if (!ifs)
-        throw std::exception("Failed open file ");
+        throw std::runtime_error("Failed open file ");
     return std::string((std::istreambuf_iterator<char>(ifs)),
                        (std::istreambuf_iterator<char>()));
 
@@ -15,7 +15,7 @@ static std::size_t count_lines(const std::string& filename)
 {
     std::ifstream ifs(filename);
     if (!ifs)
-        throw std::exception("Failed open file ");
+        throw std::runtime_error("Failed open file ");
 
     std::string line;
     size_t counter = 0;
@@ -28,7 +28,7 @@ std::ifstream::pos_type filesize(const std::string& filename)
 {
     std::ifstream ifs(filename, std::ifstream::ate | std::ifstream::binary);
     if (!ifs)
-        throw std::exception("Failed open file ");
+        throw std::runtime_error("Failed open file ");
 
     return ifs.tellg();
 }