Enable build with clang static analyzer

As part of LLVM, there is a clang static analyzer tool that provides
useful analysis of potential issues in the source code base.

This change enables building coreclr with that analyzer enabled.

1 files changed, 17 insertions, 2 deletions

diff --git a/src/pal/tools/gen-buildsys-clang.sh b/src/pal/tools/gen-buildsys-clang.sh
index 2047b1eccf..95b227d89f 100755
--- a/src/pal/tools/gen-buildsys-clang.sh
+++ b/src/pal/tools/gen-buildsys-clang.sh
@@ -6,12 +6,13 @@
 if [ $# -lt 4 ]
 then
   echo "Usage..."
-  echo "gen-buildsys-clang.sh <path to top level CMakeLists.txt> <ClangMajorVersion> <ClangMinorVersion> <Architecture> [build flavor] [coverage] [ninja] [cmakeargs]"
+  echo "gen-buildsys-clang.sh <path to top level CMakeLists.txt> <ClangMajorVersion> <ClangMinorVersion> <Architecture> [build flavor] [coverage] [ninja] [scan-build] [cmakeargs]"
   echo "Specify the path to the top level CMake file - <ProjectK>/src/NDP"
   echo "Specify the clang version to use, split into major and minor version"
   echo "Specify the target architecture." 
   echo "Optionally specify the build configuration (flavor.) Defaults to DEBUG." 
   echo "Optionally specify 'coverage' to enable code coverage build."
+  echo "Optionally specify 'scan-build' to enable build with clang static analyzer."
   echo "Target ninja instead of make. ninja must be on the PATH."
   echo "Pass additional arguments to CMake call."
   exit 1
@@ -42,6 +43,7 @@ build_arch="$4"
 buildtype=DEBUG
 code_coverage=OFF
 build_tests=OFF
+scan_build=OFF
 generator="Unix Makefiles"
 __UnprocessedCMakeArgs=""
 
@@ -59,6 +61,10 @@ for i in "${@:5}"; do
       NINJA)
       generator=Ninja
       ;;
+      SCAN-BUILD)
+      echo "Static analysis is turned on for this build."
+      scan_build=ON
+      ;;
       *)
       __UnprocessedCMakeArgs="${__UnprocessedCMakeArgs}${__UnprocessedCMakeArgs:+ }$i"
     esac
@@ -152,7 +158,16 @@ fi
 # Determine the current script directory
 __currentScriptDir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
-cmake \
+cmake_command=cmake
+
+if [[ "$scan_build" == "ON" ]]; then
+    export CCC_CC=$CC
+    export CCC_CXX=$CXX
+    export SCAN_BUILD_COMMAND=$(command -v scan-build$desired_llvm_version)
+    cmake_command="$SCAN_BUILD_COMMAND $cmake_command"
+fi
+
+$cmake_command \
   -G "$generator" \
   "-DCMAKE_USER_MAKE_RULES_OVERRIDE=${__currentScriptDir}/$overridefile" \
   "-DCMAKE_AR=$llvm_ar" \