Finish 3rd example

.gitignore

@@ -37,4 +37,5 @@
 helloworld*
 env.txt
 build/
+install/
 

execEx/03/SConscript

@@ -0,0 +1,6 @@
+Import('env')
+
+prog = env.Program(target='helloworld',
+                   source=['main.cpp', 'foo.cpp'])
+
+env.Install(env.installDir, prog)

execEx/03/SConstruct

@@ -0,0 +1,87 @@
+
+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++')
+ccFlags = []
+linkFlags = []
+if compilerName == 'gcc':
+  env.Replace(CC='gcc',
+              CXX='g++')
+  ccFlags = ["-std=c++1z", "-Wall", "-Wuninitialized", "-Wunused", "-Wconversion", "-fpermissive"]
+  if debugArg == '0':
+    ccFlags += ["-O3"]
+    linkFlags = ["-Wl,--export-dynamic"]
+  else:
+    ccFlags += ["-g", "-O0"]
+    linkFlags = ["-g"]
+else:
+  ccFlags = ["-std=c++1z", "-Wall", "-Wuninitialized", "-Wunused", "-Wconversion", "-fpermissive"]
+  if debugArg == '0':
+    ccFlags += ["-O3"]
+    linkFlags = ["-Wl,--export-dynamic"]
+  else:
+    ccFlags += ["-g", "-O0"]
+    linkFlags = ["-g"]
+
+env['CPPFLAGS'] = ccFlags
+env['LINKFLAGS'] = linkFlags
+
+cppDefine = {}
+
+if assertArg == '0':
+  cppDefine['NDEBUG'] = None
+
+env['CPPDEFINES'] = cppDefine
+
+#
+# Paths setup
+#
+
+env.srcDir = Dir('#').abspath
+
+env.buildDir = os.path.join(env.srcDir, 'build', buildName)
+env.installDir = os.path.join(env.srcDir, 'install', buildName)
+
+VariantDir(variant_dir=env.buildDir,
+           src_dir=env.srcDir,
+           duplicate=0)
+
+#
+# Add build targets 
+#
+
+SConscript(os.path.join(env.buildDir, 'SConscript'),
+           exports={'env' : env})

src/execEx/03/SConstruct

@@ -1,52 +0,0 @@
-
-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 = 
-
-
-#
-# Add build targets 
-#
-env.Program(target='helloworld',
-            source=['main.cpp', 'foo.cpp'])