Merge opendbc subtree

opendbc/SConstruct

@@ -0,0 +1,57 @@
+import os
+import subprocess
+
+zmq = 'zmq'
+arch = subprocess.check_output(["uname", "-m"], encoding='utf8').rstrip()
+
+cereal_dir = Dir('.')
+
+cpppath = [
+    '#',
+    '#cereal',
+    "#cereal/messaging",
+    "#opendbc/can",
+    '/usr/lib/include',
+]
+
+AddOption('--test',
+          action='store_true',
+          help='build test files')
+
+AddOption('--asan',
+          action='store_true',
+          help='turn on ASAN')
+
+ccflags_asan = ["-fsanitize=address", "-fno-omit-frame-pointer"] if GetOption('asan') else []
+ldflags_asan = ["-fsanitize=address"] if GetOption('asan') else []
+
+env = Environment(
+  ENV=os.environ,
+  CC='clang',
+  CXX='clang++',
+  CCFLAGS=[
+    "-g",
+    "-fPIC",
+    "-O2",
+    "-Werror=implicit-function-declaration",
+    "-Werror=incompatible-pointer-types",
+    "-Werror=int-conversion",
+    "-Werror=return-type",
+    "-Werror=format-extra-args",
+  ] + ccflags_asan,
+  LDFLAGS=ldflags_asan,
+  LINKFLAGS=ldflags_asan,
+
+  CFLAGS="-std=gnu11",
+  CXXFLAGS="-std=c++14",
+  CPPPATH=cpppath,
+)
+
+Export('env', 'zmq', 'arch')
+
+cereal = [File('#cereal/libcereal.a')]
+messaging = [File('#cereal/libmessaging.a')]
+Export('cereal', 'messaging')
+
+SConscript(['cereal/SConscript'])
+SConscript(['opendbc/can/SConscript'])