scons: Add an analyze option.

For Clang static code analyzer, the scan-build script will produce more
comprehensive output.  Nevertheless you can invoke it as

  CC=clang CXX=clang++ scons analyze=1

For MSVC this is the best way to use its static code analysis.  Simply
invoke as

  scons analyze=1

Reviewed-by: Brian Paul <brianp@vmware.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/scons/gallium.py b/scons/gallium.py
index 42e8f7c5476..e873c658ad0 100755
--- a/scons/gallium.py
+++ b/scons/gallium.py
@@ -467,6 +467,18 @@ def generate(env):
             env.Append(CCFLAGS = ['/MT'])
             env.Append(SHCCFLAGS = ['/LD'])
     
+    # Static code analysis
+    if env['analyze']:
+        if env['msvc']:
+            # http://msdn.microsoft.com/en-us/library/ms173498.aspx
+            env.Append(CCFLAGS = [
+                '/analyze',
+                #'/analyze:log', '${TARGET.base}.xml',
+            ])
+        if env['clang']:
+            # scan-build will produce more comprehensive output
+            env.Append(CCFLAGS = ['--analyze'])
+
     # Assembler options
     if gcc_compat:
         if env['machine'] == 'x86':