Added warnings that appeared after GCC 5/6 release.

--HG--
branch : develop

Valentina.pro

@@ -6,5 +6,27 @@ include(common.pri)
     error("Use at least Qt 5.0.0.")
 }
 
+unix {
+    *-g++ {
+        GCC_VERSION = $$system("g++ -dumpversion")
+        contains(GCC_VERSION, 6.[0-9]) {
+            message( "g++ version 6.x found" )
+            CONFIG += g++6
+        } else {
+            contains(GCC_VERSION, 5.[0-9]) {
+                message( "g++ version 5.x found" )
+                CONFIG += g++5
+            } else {
+                contains(GCC_VERSION, 4.[0-9]) {
+                    message( "g++ version 4.x found" )
+                    CONFIG += g++4
+                } else {
+                    message( "Unknown GCC configuration" )
+                }
+            }
+        }
+    }
+}
+
 TEMPLATE = subdirs
 SUBDIRS = src

common.pri

@@ -256,6 +256,25 @@ GCC_DEBUG_CXXFLAGS += \
     -Wno-unused \
     -ftrapv
 
+# Since GCC 5
+g++5:GCC_DEBUG_CXXFLAGS += \
+    -Wswitch-bool \
+    -Wlogical-not-parentheses \
+    -Wsizeof-array-argument \
+    -Wbool-compare \
+    -Wsuggest-final-types \
+    -Wsuggest-final-methods
+
+# Since GCC 6
+g++6:GCC_DEBUG_CXXFLAGS += \
+    -Wshift-negative-value \
+    -Wshift-overflow \
+    -Wshift-overflow=2 \
+    -Wtautological-compare \
+    -Wnull-dereference \
+    -Wduplicated-cond \
+    -Wmisleading-indentation
+
 # Usefull Clang warnings keys.
 CLANG_DEBUG_CXXFLAGS += \
     -O0 \ # Turn off oprimization.