COMPMID-619: Logging interface

Change-Id: I73d1433ee7a682aeabb7540aa2ea1f6564f90aae
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/91775
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/SConstruct b/SConstruct
index 4ef67ef..c2c76fb 100644
--- a/SConstruct
+++ b/SConstruct
@@ -39,6 +39,7 @@
 vars.AddVariables(
     BoolVariable("debug", "Debug", False),
     BoolVariable("asserts", "Enable asserts (this flag is forced to 1 for debug=1)", False),
+    BoolVariable("logging", "Logging", False),
     EnumVariable("arch", "Target Architecture", "armv7a", allowed_values=("armv7a", "arm64-v8a", "arm64-v8.2-a", "x86_32", "x86_64")),
     EnumVariable("os", "Target OS", "linux", allowed_values=("linux", "android", "bare_metal")),
     EnumVariable("build", "Build type", "cross_compile", allowed_values=("native", "cross_compile")),
@@ -207,6 +208,9 @@
     env.Append(CPPDEFINES = ['ARM_COMPUTE_ASSERTS_ENABLED'])
     env.Append(CXXFLAGS = ['-fstack-protector-strong'])
 
+if env['logging']:
+    env.Append(CPPDEFINES = ['ARM_COMPUTE_LOGGING_ENABLED'])
+
 env.Append(CPPPATH = ['#/include', "#"])
 env.Append(CXXFLAGS = env['extra_cxx_flags'])