From b2ba8d5ade0f9d55c2b51ca41d9c9604662452ad Mon Sep 17 00:00:00 2001
From: Robert Norris <rw_norris@hotmail.com>
Date: Mon, 12 Feb 2018 14:16:17 -0800
Subject: [PATCH] SConstruct: Allow building for Python 3

Still usable with Python 2

Tested:
scons build-all check

Debian Unstable with python 2.7.14
OpenSUSE Tumbleweed with python 3.6.4
---
 SConstruct | 30 ++++++++++++++++--------------
 1 file changed, 16 insertions(+), 14 deletions(-)

diff --git a/SConstruct b/SConstruct
index c6a309ec3c30..17b47e21342f 100644
--- a/SConstruct
+++ b/SConstruct
@@ -370,7 +370,7 @@ for flag in ["LDFLAGS", "SHLINKFLAGS", "CPPFLAGS"]:
 
 
 # Keep scan-build options in the environment
-for key, value in os.environ.iteritems():
+for key, value in os.environ.items():
     if key.startswith('CCC_'):
         env.Append(ENV={key: value})
 
@@ -476,6 +476,8 @@ if env['sysroot']:
     env.MergeFlags({"LINKFLAGS": ["--sysroot=%s" % env['sysroot']]})
 
 # Build help
+def cmp(a, b):
+    return (a > b) - (a < b)
 
 Help("""Arguments may be a mixture of switches and targets in any order.
 Switches apply to the entire build regardless of where they are in the order.
@@ -859,9 +861,9 @@ else:
         "dbus_export": ["libdbus-1"],
     }
 
-    keys = map(lambda x: (x[0], x[2]), boolopts)  \
-        + map(lambda x: (x[0], x[2]), nonboolopts) \
-        + map(lambda x: (x[0], x[2]), pathopts)
+    keys = list(map(lambda x: (x[0], x[2]), boolopts))  \
+        + list(map(lambda x: (x[0], x[2]), nonboolopts)) \
+        + list(map(lambda x: (x[0], x[2]), pathopts))
     keys.sort()
     for (key, help) in keys:
         value = env[key]
@@ -998,7 +1000,7 @@ else:
 if env['python']:  # May have been turned off by error
     env['PYTHON'] = target_python_path
     env['ENV']['PYTHON'] = target_python_path  # For regress-driver
-    py_config_vars = ast.literal_eval(py_config_text)
+    py_config_vars = ast.literal_eval(py_config_text.decode())
     py_config_vars = [[] if x is None else x for x in py_config_vars]
     python_config = dict(zip(PYTHON_CONFIG_NAMES, py_config_vars))
 
@@ -1387,7 +1389,7 @@ else:
 
     python_objects = {}
     python_compiled_libs = {}
-    for ext, sources in python_extensions.iteritems():
+    for ext, sources in python_extensions.items():
         python_objects[ext] = []
         for src in sources:
             python_objects[ext].append(
@@ -1417,7 +1419,7 @@ Platform: UNKNOWN
     python_egg_info = python_env.Textfile(target="gps-%s.egg-info"
                                           % (gpsd_version, ),
                                           source=python_egg_info_source)
-    python_built_extensions = python_compiled_libs.values()
+    python_built_extensions = list(python_compiled_libs.values())
     python_targets = python_built_extensions + [python_egg_info]
 
 env.Command(target="packet_names.h", source="packet_states.h", action="""
@@ -1624,14 +1626,14 @@ if env['xgps']:
         "xgpsspeed.1": "gps.xml",
         "xgps.1": "gps.xml",
     })
-all_manpages = base_manpages.keys() + python_manpages.keys()
+all_manpages = list(base_manpages.keys()) + list(python_manpages.keys())
 
 man_env = env.Clone()
 if man_env.GetOption('silent'):
     man_env['SPAWN'] = filtered_spawn  # Suppress stderr chatter
 manpage_targets = []
 if manbuilder:
-    for (man, xml) in base_manpages.items() + python_manpages.items():
+    for (man, xml) in list(base_manpages.items()) + list(python_manpages.items()):
         manpage_targets.append(man_env.Man(source=xml, target=man))
 
 # Where it all comes together
@@ -1682,7 +1684,7 @@ if ((not env['debug'] and not env['profiling'] and not env['nostrip']
 if not env['python']:
     python_install = []
 else:
-    python_module_dir = python_libdir + os.sep + 'gps'
+    python_module_dir = str(python_libdir) + os.sep + 'gps'
     python_extensions_install = python_env.Install(DESTDIR + python_module_dir,
                                                    python_built_extensions)
     if ((not env['debug'] and not env['profiling']
@@ -1695,7 +1697,7 @@ else:
     python_progs_install = python_env.Install(installdir('bindir'),
                                               python_progs)
 
-    python_egg_info_install = python_env.Install(DESTDIR + python_libdir,
+    python_egg_info_install = python_env.Install(DESTDIR + str(python_libdir),
                                                  python_egg_info)
     python_install = [python_extensions_install,
                       python_modules_install,
@@ -1712,7 +1714,7 @@ if qt_env:
 
 
 maninstall = []
-for manpage in base_manpages.keys() + python_manpages.keys():
+for manpage in list(base_manpages.keys()) + list(python_manpages.keys()):
     if not manbuilder and not os.path.exists(manpage):
         continue
     section = manpage.split(".")[1]
@@ -2198,7 +2200,7 @@ htmlpages = Split('''
     www/writing-a-driver.html
     ''')
 
-webpages = htmlpages + asciidocs + map(lambda f: f[:-3], glob.glob("www/*.in"))
+webpages = htmlpages + asciidocs + list(map(lambda f: f[:-3], glob.glob("www/*.in")))
 
 www = env.Alias('www', webpages)
 
@@ -2376,7 +2378,7 @@ if os.path.exists("gpsd.c") and os.path.exists(".gitignore"):
     if ".gitignore" in distfiles:
         distfiles.remove(".gitignore")
     distfiles += generated_sources
-    distfiles += base_manpages.keys() + python_manpages.keys()
+    distfiles += list(base_manpages.keys()) + list(python_manpages.keys())
     if "packaging/rpm/gpsd.spec" not in distfiles:
         distfiles.append("packaging/rpm/gpsd.spec")
 
-- 
2.19.1