Initial commit

.gitignore

@@ -36,3 +36,5 @@
 
 helloworld*
 env.txt
+build/
+

src/execEx/03/SConstruct

@@ -1,15 +1,52 @@
 
+import os
+
+Help("""
+
+  This is the third scons example. In this example we see more things that we
+  can do with scons. Namely: arguments, variant build directory, and install.
+  
+  One can add the help for the expected build arguments using this help 
+  function call
+  
+  DEBUG=1,0             - enable debug build, default 1
+  ASSERT=1,0            - enable run time assertion, default 1 in DEBUG=1 and 0 otherwise
+  COMPILER=compilerName - compiler name
+  BUILDNAME=buildName   - build name
+
+""")
+
+#
+# Processing arguments
+#
+debugArg = ARGUMENTS.get('DEBUG', '1')
+if debugArg not in ['0', '1']:
+  raise RuntimeError('Check the DEBUG input argument.')
+
+assertArg = '1' if debugArg == '1' else ARGUMENTS.get('ASSERT', '0')
+if assertArg not in ['0', '1']:
+  raise RuntimeError('Check the ASSERT input argument.')
+
+compilerName = ARGUMENTS.get('COMPILER', '')
+buildName = ARGUMENTS.get('BUILDNAME', 'default')
+
+#
+# Initializing the environment
+#
+env = Environment(CC='clang',
+                  CXX='clang')
+
+if compilerName == 'gcc':
+  env.Replace(CC='gcc')
+  env.Replace(CXX='g++')
+
+srcDir = Dir('#').abspath
+
+buildDir = 
+
 
-env = Environment()
-
-open('env.txt', 'w').write(env.Dump())
-
+#
+# Add build targets 
+#
 env.Program(target='helloworld',
             source=['main.cpp', 'foo.cpp'])
-
-envClang = env.Clone()
-envClang.Replace(CXX='clang')
-
-envClang.Program(target='helloworld-clang',
-                 source=['main.cpp', 'foo.cpp'])
-