diff --git a/src/Makefile b/src/Makefile
index c1cbf73..71f166c 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,5 +1,5 @@
-CFLAGS=-O2 -g -std=gnu++11 -fvisibility=hidden -fpic
-LDFLAGS=-fvisibility=hidden -Wl,--export-dynamic -fpic
+CFLAGS=-O2 -g -std=gnu++11 -fvisibility=hidden -fpic -Wall
+LDFLAGS=-fvisibility=hidden -Wl,--export-dynamic -fpic -Wall
 
 CC=g++
 
diff --git a/src/arifmetic.cpp b/src/arifmetic.cpp
index 9c2b8c3..cc18bf9 100644
--- a/src/arifmetic.cpp
+++ b/src/arifmetic.cpp
@@ -4,22 +4,23 @@
 ObjectBase* Arifm_Add(ObjectList* input)
 {
  if(input->Size()!=2) return 0;
- std::type_index t1(typeid(*input->At(0))),t2(typeid(*input->At(1)));
+ const ObjectBase *arg1=input->At(0),*arg2=input->At(1);
+ std::type_index t1(typeid(*arg1)),t2(typeid(*arg2));
  std::type_index tr(typeid(ObjectReal)),ti(typeid(ObjectInt));
 
  if( (t1!=tr && t1!=ti) || (t2!=tr && t2!=ti) ) return 0;
 
  // Integer arifmetic
- if(t1==ti && t2==ti) return new ObjectInt(dynamic_cast<const ObjectInt*>(input->At(0))->Value() + dynamic_cast<const ObjectInt*>(input->At(1))->Value());
+ if(t1==ti && t2==ti) return new ObjectInt(dynamic_cast<const ObjectInt*>(arg1)->Value() + dynamic_cast<const ObjectInt*>(arg2)->Value());
 
  // Real arifmetic
  double r1,r2;
 
- if(t1==tr) r1=dynamic_cast<const ObjectReal*>(input->At(0))->Value();
- else r1=dynamic_cast<const ObjectInt*>(input->At(0))->Value();
+ if(t1==tr) r1=dynamic_cast<const ObjectReal*>(arg1)->Value();
+ else r1=dynamic_cast<const ObjectInt*>(arg1)->Value();
 
- if(t2==tr) r2=dynamic_cast<const ObjectReal*>(input->At(1))->Value();
- else r2=dynamic_cast<const ObjectInt*>(input->At(1))->Value();
+ if(t2==tr) r2=dynamic_cast<const ObjectReal*>(arg2)->Value();
+ else r2=dynamic_cast<const ObjectInt*>(arg2)->Value();
 
  return new ObjectReal(r1+r2);
 }
@@ -28,22 +29,23 @@ ObjectBase* Arifm_Add(ObjectList* input)
 ObjectBase* Arifm_Sub(ObjectList* input)
 {
  if(input->Size()!=2) return 0;
- std::type_index t1(typeid(*input->At(0))),t2(typeid(*input->At(1)));
+ const ObjectBase *arg1=input->At(0),*arg2=input->At(1);
+ std::type_index t1(typeid(*arg1)),t2(typeid(*arg2));
  std::type_index tr(typeid(ObjectReal)),ti(typeid(ObjectInt));
 
  if( (t1!=tr && t1!=ti) || (t2!=tr && t2!=ti) ) return 0;
 
  // Integer arifmetic
- if(t1==ti && t2==ti) return new ObjectInt(dynamic_cast<const ObjectInt*>(input->At(0))->Value() - dynamic_cast<const ObjectInt*>(input->At(1))->Value());
+ if(t1==ti && t2==ti) return new ObjectInt(dynamic_cast<const ObjectInt*>(arg1)->Value() - dynamic_cast<const ObjectInt*>(arg2)->Value());
 
  // Real arifmetic
  double r1,r2;
 
- if(t1==tr) r1=dynamic_cast<const ObjectReal*>(input->At(0))->Value();
- else r1=dynamic_cast<const ObjectInt*>(input->At(0))->Value();
+ if(t1==tr) r1=dynamic_cast<const ObjectReal*>(arg1)->Value();
+ else r1=dynamic_cast<const ObjectInt*>(arg1)->Value();
 
- if(t2==tr) r2=dynamic_cast<const ObjectReal*>(input->At(1))->Value();
- else r2=dynamic_cast<const ObjectInt*>(input->At(1))->Value();
+ if(t2==tr) r2=dynamic_cast<const ObjectReal*>(arg2)->Value();
+ else r2=dynamic_cast<const ObjectInt*>(arg2)->Value();
 
  return new ObjectReal(r1-r2);
 }
@@ -52,22 +54,23 @@ ObjectBase* Arifm_Sub(ObjectList* input)
 ObjectBase* Arifm_Mul(ObjectList* input)
 {
  if(input->Size()!=2) return 0;
- std::type_index t1(typeid(*input->At(0))),t2(typeid(*input->At(1)));
+ const ObjectBase *arg1=input->At(0),*arg2=input->At(1);
+ std::type_index t1(typeid(*arg1)),t2(typeid(*arg2));
  std::type_index tr(typeid(ObjectReal)),ti(typeid(ObjectInt));
 
  if( (t1!=tr && t1!=ti) || (t2!=tr && t2!=ti) ) return 0;
 
  // Integer arifmetic
- if(t1==ti && t2==ti) return new ObjectInt(dynamic_cast<const ObjectInt*>(input->At(0))->Value() * dynamic_cast<const ObjectInt*>(input->At(1))->Value());
+ if(t1==ti && t2==ti) return new ObjectInt(dynamic_cast<const ObjectInt*>(arg1)->Value() * dynamic_cast<const ObjectInt*>(arg2)->Value());
 
  // Real arifmetic
  double r1,r2;
 
- if(t1==tr) r1=dynamic_cast<const ObjectReal*>(input->At(0))->Value();
- else r1=dynamic_cast<const ObjectInt*>(input->At(0))->Value();
+ if(t1==tr) r1=dynamic_cast<const ObjectReal*>(arg1)->Value();
+ else r1=dynamic_cast<const ObjectInt*>(arg1)->Value();
 
- if(t2==tr) r2=dynamic_cast<const ObjectReal*>(input->At(1))->Value();
- else r2=dynamic_cast<const ObjectInt*>(input->At(1))->Value();
+ if(t2==tr) r2=dynamic_cast<const ObjectReal*>(arg2)->Value();
+ else r2=dynamic_cast<const ObjectInt*>(arg2)->Value();
 
  return new ObjectReal(r1*r2);
 }
@@ -76,22 +79,23 @@ ObjectBase* Arifm_Mul(ObjectList* input)
 ObjectBase* Arifm_Div(ObjectList* input)
 {
  if(input->Size()!=2) return 0;
- std::type_index t1(typeid(*input->At(0))),t2(typeid(*input->At(1)));
+ const ObjectBase *arg1=input->At(0),*arg2=input->At(1);
+ std::type_index t1(typeid(*arg1)),t2(typeid(*arg2));
  std::type_index tr(typeid(ObjectReal)),ti(typeid(ObjectInt));
 
  if( (t1!=tr && t1!=ti) || (t2!=tr && t2!=ti) ) return 0;
 
  // Integer arifmetic
- if(t1==ti && t2==ti) return new ObjectInt(dynamic_cast<const ObjectInt*>(input->At(0))->Value() / dynamic_cast<const ObjectInt*>(input->At(1))->Value());
+ if(t1==ti && t2==ti) return new ObjectInt(dynamic_cast<const ObjectInt*>(arg1)->Value() / dynamic_cast<const ObjectInt*>(arg2)->Value());
 
  // Real arifmetic
  double r1,r2;
 
- if(t1==tr) r1=dynamic_cast<const ObjectReal*>(input->At(0))->Value();
- else r1=dynamic_cast<const ObjectInt*>(input->At(0))->Value();
+ if(t1==tr) r1=dynamic_cast<const ObjectReal*>(arg1)->Value();
+ else r1=dynamic_cast<const ObjectInt*>(arg1)->Value();
 
- if(t2==tr) r2=dynamic_cast<const ObjectReal*>(input->At(1))->Value();
- else r2=dynamic_cast<const ObjectInt*>(input->At(1))->Value();
+ if(t2==tr) r2=dynamic_cast<const ObjectReal*>(arg2)->Value();
+ else r2=dynamic_cast<const ObjectInt*>(arg2)->Value();
 
  return new ObjectReal(r1/r2);
 }
@@ -100,7 +104,8 @@ ObjectBase* Arifm_Div(ObjectList* input)
 ObjectBase* Arifm_Pow(ObjectList* input)
 {
  if(input->Size()!=2) return 0;
- std::type_index t1(typeid(*input->At(0))),t2(typeid(*input->At(1)));
+ const ObjectBase *arg1=input->At(0),*arg2=input->At(1);
+ std::type_index t1(typeid(*arg1)),t2(typeid(*arg2));
  std::type_index tr(typeid(ObjectReal)),ti(typeid(ObjectInt));
 
  if( (t1!=tr && t1!=ti) || (t2!=tr && t2!=ti) ) return 0;
@@ -108,11 +113,11 @@ ObjectBase* Arifm_Pow(ObjectList* input)
  // Only real arifmetic
  double r1,r2;
 
- if(t1==tr) r1=dynamic_cast<const ObjectReal*>(input->At(0))->Value();
- else r1=dynamic_cast<const ObjectInt*>(input->At(0))->Value();
+ if(t1==tr) r1=dynamic_cast<const ObjectReal*>(arg1)->Value();
+ else r1=dynamic_cast<const ObjectInt*>(arg1)->Value();
 
- if(t2==tr) r2=dynamic_cast<const ObjectReal*>(input->At(1))->Value();
- else r2=dynamic_cast<const ObjectInt*>(input->At(1))->Value();
+ if(t2==tr) r2=dynamic_cast<const ObjectReal*>(arg2)->Value();
+ else r2=dynamic_cast<const ObjectInt*>(arg2)->Value();
 
  return new ObjectReal(pow(r1,r2));
 }
@@ -121,13 +126,14 @@ ObjectBase* Arifm_Pow(ObjectList* input)
 ObjectBase* Arifm_Neg(ObjectList* input)
 {
  if(input->Size()!=1) return 0;
- std::type_index t(typeid(*input->At(0)));
+ const ObjectBase *arg=input->At(0);
+ std::type_index t(typeid(*arg));
  std::type_index tr(typeid(ObjectReal)),ti(typeid(ObjectInt));
 
  // Integer arifmetic
- if(t==ti) return new ObjectInt(-dynamic_cast<const ObjectInt*>(input->At(0))->Value());
+ if(t==ti) return new ObjectInt(-dynamic_cast<const ObjectInt*>(arg)->Value());
  // Real arifmetic
- if(t==tr) return new ObjectReal(-dynamic_cast<const ObjectReal*>(input->At(0))->Value());
+ if(t==tr) return new ObjectReal(-dynamic_cast<const ObjectReal*>(arg)->Value());
 
  return 0;
 }
@@ -136,13 +142,14 @@ ObjectBase* Arifm_Neg(ObjectList* input)
 ObjectBase* Arifm_Pos(ObjectList* input)
 {
  if(input->Size()!=1) return 0;
- std::type_index t(typeid(*input->At(0)));
+ const ObjectBase *arg=input->At(0);
+ std::type_index t(typeid(*arg));
  std::type_index tr(typeid(ObjectReal)),ti(typeid(ObjectInt));
 
  // Integer arifmetic
- if(t==ti) return new ObjectInt(dynamic_cast<const ObjectInt*>(input->At(0))->Value());
+ if(t==ti) return new ObjectInt(dynamic_cast<const ObjectInt*>(arg)->Value());
  // Real arifmetic
- if(t==tr) return new ObjectReal(dynamic_cast<const ObjectReal*>(input->At(0))->Value());
+ if(t==tr) return new ObjectReal(dynamic_cast<const ObjectReal*>(arg)->Value());
 
  return 0;
 }
diff --git a/src/debug.h b/src/debug.h
index 76803b4..c67e7c5 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -5,9 +5,7 @@
 
 enum debug_level {INTERNALREQUEST,MOREDEBUG,DEBUG,INFO,WARNING,ERROR};
 
-extern "C" {
 EXPORT std::ostream& COUT(debug_level dl);
-}
 
 debug_level SetDebugLevel(debug_level dl=INTERNALREQUEST);
 
diff --git a/src/deptree.cpp b/src/deptree.cpp
index 503a749..5f80f58 100644
--- a/src/deptree.cpp
+++ b/src/deptree.cpp
@@ -103,14 +103,14 @@ int DepTree::CreateGlobalTree(UsedType& used)
  }
 
  type=DepTree::ROOT;
- for(int i=0; i<G_tosave.size(); i++)
+ for(G_toType::size_type i=0; i<G_tosave.size(); i++)
  {
   auto n=*childrens.insert(new DepTree).first;
   n->parents.insert(this);
   auto ret=n->CreateNodeFromSP(DepTree::SAVE,i,used);
   if(ret!=0) return ret;
  }
- for(int i=0; i<G_toprint.size(); i++)
+ for(G_toType::size_type i=0; i<G_toprint.size(); i++)
  {
   auto n=*childrens.insert(new DepTree).first;
   n->parents.insert(this);
diff --git a/src/parser/lexical.l b/src/parser/lexical.l
index 8062dc5..485bea4 100644
--- a/src/parser/lexical.l
+++ b/src/parser/lexical.l
@@ -9,6 +9,7 @@
 %option extra-type="struct lexical_extra*"
 %option bison-bridge
 %option bison-locations
+%option nounput
 %x PSTRING
 %x PARSE
 
@@ -22,6 +23,8 @@
 #include "../object.h"
 #include "parser.h"
 #include "grammatical.h"
+// Get rid of warning on unneeded function
+#define YY_NO_INPUT
 static std::string str;
 %}