minor improvements (#1929)

* lib: isNonBoolStdType no longer needed

lib/checkbool.cpp:50:13: warning: unused function 'isNonBoolStdType'
      [-Wunused-function]
static bool isNonBoolStdType(const Variable* var)

* cmake: C++11 is required

also change instructions to a more common syntax

CMakeLists.txt

@@ -9,6 +9,9 @@ include(cmake/findDependencies.cmake REQUIRED)
 include(cmake/compileroptions.cmake REQUIRED)
 include(cmake/compilerDefinitions.cmake REQUIRED)
 include(cmake/buildFiles.cmake REQUIRED)
+include(cmake/cxx11.cmake REQUIRED)
+
+use_cxx11()
 
 file(GLOB cfgs "cfg/*.cfg")
 

cmake/cxx11.cmake

@@ -0,0 +1,14 @@
+macro(use_cxx11)
+  if (CMAKE_VERSION VERSION_LESS "3.1")
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
+    elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+    endif ()
+  else ()
+    set (CMAKE_CXX_STANDARD 11)
+    if (POLICY CMP0025)
+      cmake_policy(SET CMP0025 NEW)
+    endif ()
+  endif ()
+endmacro(use_cxx11)

lib/checkbool.cpp

@@ -47,10 +47,6 @@ static bool isBool(const Variable* var)
 {
     return (var && Token::Match(var->typeEndToken(), "bool|_Bool"));
 }
-static bool isNonBoolStdType(const Variable* var)
-{
-    return (var && var->typeEndToken()->isStandardType() && !Token::Match(var->typeEndToken(), "bool|_Bool"));
-}
 
 //---------------------------------------------------------------------------
 void CheckBool::checkIncrementBoolean()

readme.md

@@ -36,15 +36,12 @@ There are multiple compilation choices:
 Example, compiling Cppcheck with cmake:
 
 ```shell
-mkdir b
+mkdir build
-cd b
+cd build
 cmake ..
-make
+cmake --build .
 ```
 
-If you need to specify c++ standard you can do it with the option
--DCMAKE_CXX_STANDARD=11
-
 If you want to compile the GUI you can use the flag
 -DBUILD_GUI=ON
 

readme.txt

@@ -34,13 +34,10 @@ Compiling
     cmake
     =====
         Example, compiling Cppcheck with cmake:
-            mkdir b
+            mkdir build
-            cd b
+            cd build
             cmake ..
-            make
+            cmake --build .
-
-        If you need to specify c++ standard you can do it with the option
-        -DCMAKE_CXX_STANDARD=11
 
         If you want to compile the GUI you can use the flag
         -DBUILD_GUI=ON