diff --git a/Exception.cpp b/Exception.cpp
index aa8f721..3220f2a 100644
--- a/Exception.cpp
+++ b/Exception.cpp
@@ -14,7 +14,5 @@ namespace coreutils {
       
       Log(LOG_EXCEPT) << text;
    }
-   
-   Exception::~Exception() {}
 
 }
diff --git a/Exception.h b/Exception.h
index cd5fd86..66d5b37 100644
--- a/Exception.h
+++ b/Exception.h
@@ -9,7 +9,6 @@ namespace coreutils {
       
     public:
       Exception(std::string text, std::string file = __FILE__, int line = __LINE__, int errorNumber = -1);
-      ~Exception();
       
       std::string className;
       std::string file;
diff --git a/Log.cpp b/Log.cpp
index 4031ab9..cdaf5c2 100644
--- a/Log.cpp
+++ b/Log.cpp
@@ -61,6 +61,8 @@ namespace coreutils {
    Log::~Log() {
       
       if(output) {
+
+	 mtx.lock();
 	 
 	 std::stringstream out;
 	 out << seq << "." << this->str() << std::endl;;
@@ -73,6 +75,8 @@ namespace coreutils {
 	 
 	 std::cout << out.str();
 	 ++seq;
+	 
+	 mtx.unlock();
       }
    }
    
diff --git a/Log.h b/Log.h
index 801ebce..4dbe5d3 100644
--- a/Log.h
+++ b/Log.h
@@ -86,6 +86,9 @@ namespace coreutils {
       ///
       
       static int seq;
+
+    private:
+      std::mutex mtx;
       
    };
    
diff --git a/compile b/compile
index c8e34b9..9121962 100755
--- a/compile
+++ b/compile
@@ -5,7 +5,7 @@ do
    filename="${file%.*}"
    list="$list $filename.o"  
    echo -n "Compiling $filename..."
-   g++ -c $file &
+   g++ -g -c $file 
    if [ $? = '0' ]
    then
     echo "OK"
diff --git a/includes b/includes
index 0c4b0ca..a7773eb 100644
--- a/includes
+++ b/includes
@@ -1,4 +1,4 @@
-#define _GLIBCXX_USE_CXX11_ABI 0
+
 
 #include <iostream>
 #include <vector>