New warning keys since GCC 7.

--HG--
branch : develop

Valentina.pro

@@ -16,19 +16,24 @@ count(LIST, 1, >): error("The build will fail. Path '$${OUT_PWD}' contains space
 unix {
     *-g++ {
         GCC_VERSION = $$system("g++ -dumpversion")
-        contains(GCC_VERSION, 6.[0-9]) {
-            message( "g++ version 6.x found" )
-            CONFIG += g++6
+        contains(GCC_VERSION, 7.[0-9]) {
+            message( "g++ version 7.x found" )
+            CONFIG += g++7
         } else {
-            contains(GCC_VERSION, 5.[0-9]) {
-                message( "g++ version 5.x found" )
-                CONFIG += g++5
+            contains(GCC_VERSION, 6.[0-9]) {
+                message( "g++ version 6.x found" )
+                CONFIG += g++6
             } else {
-                contains(GCC_VERSION, 4.[0-9]) {
-                    message( "g++ version 4.x found" )
-                    CONFIG += g++4
+                contains(GCC_VERSION, 5.[0-9]) {
+                    message( "g++ version 5.x found" )
+                    CONFIG += g++5
                 } else {
-                    message( "Unknown GCC configuration" )
+                    contains(GCC_VERSION, 4.[0-9]) {
+                        message( "g++ version 4.x found" )
+                        CONFIG += g++4
+                    } else {
+                        message( "Unknown GCC configuration" )
+                    }
                 }
             }
         }

common.pri

@@ -283,6 +283,13 @@ g++6:GCC_DEBUG_CXXFLAGS += \
     -Wduplicated-cond \
     -Wmisleading-indentation
 
+# Since GCC 7
+g++7:GCC_DEBUG_CXXFLAGS += \
+    -Wduplicated-branches \
+    -Wrestrict \
+    -Walloc-zero \
+    -Wnonnull
+
 # Usefull Clang warnings keys.
 CLANG_DEBUG_CXXFLAGS += \
     -O0 \ # Turn off oprimization.