refactor build for tree of scons makefiles, fix out of source build, correct target handling

.gitignore

@@ -47,4 +47,4 @@ examples/wsperf/wsperf
 
 .sconsign.dblite
 
-release/
+build/

SConstruct

@@ -63,15 +63,12 @@ elif env['PLATFORM'] == 'posix':
    #env['LINKFLAGS'] = ''
 
 
-env.VariantDir("release/", "src/");
-
 if env['PLATFORM'].startswith('win'):
-   lib_path = env['BOOST_LIBS']
+   env['LIBPATH'] = env['BOOST_LIBS']
 else:
-   lib_path = ['/usr/lib',
-               '/usr/local/lib',
-               env['BOOST_LIBS'],
-               '#/release']
+   env['LIBPATH'] = ['/usr/lib',
+                     '/usr/local/lib',
+                     env['BOOST_LIBS']]
 
 platform_libs = []
 if env['PLATFORM'] == 'posix':
@@ -80,51 +77,30 @@ elif env['PLATFORM'].startswith('win'):
    # Win/VC++ supports autolinking. nothing to do.
    pass
 
-#### END OF GLOBAL CONF ########################################################
 
-## WebSocket++ library
-##
-lib_sources = ["base64/base64.cpp",
-               "md5/md5.c",
-               "messages/data.cpp",
-               "network_utilities.cpp",
-               "processors/hybi_header.cpp",
-               "sha1/sha1.cpp",
-               "uri.cpp"]
+releasedir = 'build/release/'
+debugdir = 'build/debug/'
+builddir = releasedir
 
-static_lib = env.StaticLibrary(target = 'release/websocketpp',
-                               source = lib_sources,
-                               srcdir = "release")
-#shared_lib=env.SharedLibrary(target = 'release/websocketpp', source = lib_sources, srcdir="release",LIBS=['boost_regex'],LIBPATH=lib_path)
+Export('env')
+Export('platform_libs')
+Export('boostlibs')
+
+## END OF CONFIG !!
+
+## TARGETS:
+
+static_lib, shared_lib = SConscript('src/SConscript',
+                                    variant_dir = builddir + 'websocketpp',
+                                    duplicate = 0)
 
 wslib = static_lib
+Export('wslib')
 
-## Echo Server
-##
-env.VariantDir("#/release/echo_server", "examples/echo_server")
-env.Program(target = "#/release/echo_server/echo_server",
-            srcdir = "#/release/echo_server/",
-            source = ["echo_server.cpp"],
-            LIBS = [wslib, platform_libs] + boostlibs(['system',
-                                                       'date_time',
-                                                       'regex',
-                                                       'thread']),
-            LIBPATH = lib_path)
+wsperf = SConscript('#/examples/wsperf/SConscript',
+                    variant_dir = builddir + 'wsperf',
+                    duplicate = 0)
 
-## wsperf
-##
-env.VariantDir("#/release/wsperf", "examples/wsperf")
-env.Program(target = "#/release/wsperf/wsperf",
-            srcdir = "#/release/wsperf/",
-            source = ["wsperf.cpp",
-                      "request.cpp",
-                      "case.cpp",
-                      "generic.cpp"],
-            LIBS = [wslib, platform_libs] + boostlibs(['system',
-                                                       'date_time',
-                                                       'regex',
-                                                       'thread',
-                                                       'random',
-                                                       'chrono',
-                                                       'program_options']),
-            LIBPATH = lib_path)
+echo_server = SConscript('#/examples/echo_server/SConscript',
+                         variant_dir = builddir + 'echo_server',
+                         duplicate = 0)

examples/echo_server/SConscript

@@ -0,0 +1,20 @@
+## echo_server
+##
+
+Import('env')
+Import('boostlibs')
+Import('wslib')
+Import('platform_libs')
+
+localenv = env.Clone ()
+
+sources = ["echo_server.cpp"]
+
+LIBS = [wslib, platform_libs] + boostlibs(['system',
+                                           'date_time',
+                                           'regex',
+                                           'thread'])
+
+prg = localenv.Program('echo_server', sources, LIBS = LIBS)
+
+Return('prg')

examples/wsperf/SConscript

@@ -0,0 +1,26 @@
+## wsperf
+##
+
+Import('env')
+Import('boostlibs')
+Import('wslib')
+Import('platform_libs')
+
+localenv = env.Clone ()
+
+sources = ["wsperf.cpp",
+           "request.cpp",
+           "case.cpp",
+           "generic.cpp"]
+
+LIBS = [wslib, platform_libs] + boostlibs(['system',
+                                           'date_time',
+                                           'regex',
+                                           'thread',
+                                           'random',
+                                           'chrono',
+                                           'program_options'])
+
+prg = localenv.Program('wsperf', sources, LIBS = LIBS)
+
+Return('prg')

src/SConscript

@@ -0,0 +1,19 @@
+## websocket++ library
+##
+
+Import('env')
+
+localenv = env.Clone ()
+
+sources = ["base64/base64.cpp",
+           "md5/md5.c",
+           "messages/data.cpp",
+           "network_utilities.cpp",
+           "processors/hybi_header.cpp",
+           "sha1/sha1.cpp",
+           "uri.cpp"]
+
+static_lib = localenv.StaticLibrary('websocketpp', sources)
+shared_lib = None # localenv.SharedLibrary('websocketpp', sources)
+
+Return('static_lib', 'shared_lib')