Add "WITH_STATIC_ANALYZER=1 m/mm/mmm/mma/mmma ..."

The new option WITH_STATIC_ANALYZER=1 instructs build system to
run static analyzer via "clang --analyze" on a successful build.
If analyzer finds any issue, instruction to open report is displayed.
See http://clang-analyzer.llvm.org/scan-build.html for details.

WITH_STATIC_ANALYZER trumps WITH_SYNTAX_CHECK if both exist.

Project use lots of GCC extensions (eg. nested function) not supported
by clang may opt out by adding LOCAL_NO_STATIC_ANALYZER:=true

Change-Id: I9970560560bd52ce5f0fd7129c3488629627c735
diff --git a/envsetup.sh b/envsetup.sh
index 3639db9..6938aa9 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -603,11 +603,26 @@
     fi
 }
 
+# Return driver for "make", if any (eg. static analyzer)
+function getdriver()
+{
+    local T="$1"
+    test "$WITH_STATIC_ANALYZER" = "0" && unset WITH_STATIC_ANALYZER
+    if [ -n "$WITH_STATIC_ANALYZER" ]; then
+        echo "\
+$T/prebuilts/clang/linux-x86/host/3.3/tools/scan-build/scan-build \
+--use-analyzer $T/prebuilts/clang/linux-x86/host/3.3/bin/clang \
+--status-bugs \
+--top=$T"
+    fi
+}
+
 function m()
 {
-    T=$(gettop)
+    local T=$(gettop)
+    local DRV=$(getdriver $T)
     if [ "$T" ]; then
-        make -C $T -f build/core/main.mk $@
+        $DRV make -C $T -f build/core/main.mk $@
     else
         echo "Couldn't locate the top of the tree.  Try setting TOP."
     fi
@@ -632,13 +647,14 @@
 
 function mm()
 {
+    local T=$(gettop)
+    local DRV=$(getdriver $T)
     # If we're sitting in the root of the build tree, just do a
     # normal make.
     if [ -f build/core/envsetup.mk -a -f Makefile ]; then
-        make $@
+        $DRV make $@
     else
         # Find the closest Android.mk file.
-        T=$(gettop)
         local M=$(findmakefile)
         # Remove the path to top as the makefilepath needs to be relative
         local M=`echo $M|sed 's:'$T'/::'`
@@ -647,14 +663,15 @@
         elif [ ! "$M" ]; then
             echo "Couldn't locate a makefile from the current directory."
         else
-            ONE_SHOT_MAKEFILE=$M make -C $T -f build/core/main.mk all_modules $@
+            ONE_SHOT_MAKEFILE=$M $DRV make -C $T -f build/core/main.mk all_modules $@
         fi
     fi
 }
 
 function mmm()
 {
-    T=$(gettop)
+    local T=$(gettop)
+    local DRV=$(getdriver $T)
     if [ "$T" ]; then
         local MAKEFILE=
         local MODULES=
@@ -694,7 +711,7 @@
                 fi
             fi
         done
-        ONE_SHOT_MAKEFILE="$MAKEFILE" make -C $T -f build/core/main.mk $DASH_ARGS $MODULES $ARGS
+        ONE_SHOT_MAKEFILE="$MAKEFILE" $DRV make -C $T -f build/core/main.mk $DASH_ARGS $MODULES $ARGS
     else
         echo "Couldn't locate the top of the tree.  Try setting TOP."
     fi
@@ -702,21 +719,23 @@
 
 function mma()
 {
+  local T=$(gettop)
+  local DRV=$(getdriver $T)
   if [ -f build/core/envsetup.mk -a -f Makefile ]; then
-    make $@
+    $DRV make $@
   else
-    T=$(gettop)
     if [ ! "$T" ]; then
       echo "Couldn't locate the top of the tree.  Try setting TOP."
     fi
     local MY_PWD=`PWD= /bin/pwd|sed 's:'$T'/::'`
-    make -C $T -f build/core/main.mk $@ all_modules BUILD_MODULES_IN_PATHS="$MY_PWD"
+    $DRV make -C $T -f build/core/main.mk $@ all_modules BUILD_MODULES_IN_PATHS="$MY_PWD"
   fi
 }
 
 function mmma()
 {
-  T=$(gettop)
+  local T=$(gettop)
+  local DRV=$(getdriver $T)
   if [ "$T" ]; then
     local DASH_ARGS=$(echo "$@" | awk -v RS=" " -v ORS=" " '/^-.*$/')
     local DIRS=$(echo "$@" | awk -v RS=" " -v ORS=" " '/^[^-].*$/')
@@ -743,7 +762,7 @@
         esac
       fi
     done
-    make -C $T -f build/core/main.mk $DASH_ARGS $ARGS all_modules BUILD_MODULES_IN_PATHS="$MODULE_PATHS"
+    $DRV make -C $T -f build/core/main.mk $DASH_ARGS $ARGS all_modules BUILD_MODULES_IN_PATHS="$MODULE_PATHS"
   else
     echo "Couldn't locate the top of the tree.  Try setting TOP."
   fi