GCC warnings. Don't use PCH if use ccache.

--HG--
branch : develop

common.pri

@@ -100,6 +100,7 @@ defineTest(forceCopyToDestdir) {
 
 # We use precompiled headers for more fast compilation source code.
 defineReplace(set_PCH){
+    unix:no_ccache|win32{
         macx:clang*{
         # Precompiled headers don't work with clang on macx.
         } else {
@@ -114,6 +115,7 @@ defineReplace(set_PCH){
                 export(PRECOMPILED_SOURCE) # export value to global variable.
             }
         }
+    }
     return(true)
 }
 

src/libs/qmuparser/qmuparser.cpp

@@ -322,8 +322,8 @@ void QmuParser::InitFun()
  */
 void QmuParser::InitConst()
 {
-    DefineConst("_pi", (qreal)M_PI);
-    DefineConst("_e", (qreal)M_E);
+    DefineConst("_pi", static_cast<qreal>(M_PI));
+    DefineConst("_e", static_cast<qreal>(M_E));
 }
 
 //---------------------------------------------------------------------------------------------------------------------

src/libs/qmuparser/qmuparsertest.cpp

@@ -1264,8 +1264,8 @@ int QmuParserTester::EqnTest ( const QString &a_str, double a_fRes, bool a_fPass
 
         p1.reset ( new qmu::QmuParser() );
         // Add constants
-        p1->DefineConst ( "pi", ( qreal ) M_PI );
-        p1->DefineConst ( "e", ( qreal ) M_E );
+        p1->DefineConst ( "pi", static_cast<qreal>(M_PI) );
+        p1->DefineConst ( "e", static_cast<qreal>(M_E) );
         p1->DefineConst ( "const", 1 );
         p1->DefineConst ( "const1", 2 );
         p1->DefineConst ( "const2", 3 );

src/libs/vdxf/dxflib/dl_writer_ascii.cpp

@@ -31,6 +31,7 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <QtGlobal>
 
 #include "dl_writer_ascii.h"
 

src/libs/vlayout/vlayout.pro

@@ -59,6 +59,11 @@ CONFIG(debug, debug|release){
                 -isystem "$${OUT_PWD}/$${RCC_DIR}" \
                 $$GCC_DEBUG_CXXFLAGS # See common.pri for more details.
 
+            # -isystem key works only for headers. In some cases it's not enough. But we can't delete these warnings and
+            # want them in the global list. Compromise decision is to delete them from the local list.
+            QMAKE_CXXFLAGS -= \
+                -Wno-long-long \
+
             noAddressSanitizer{ # For enable run qmake with CONFIG+=noAddressSanitizer
                 # do nothing
             } else {