build libpandasafety with scons (#639)

* build libpandasafety with scons

* remove makefile

* fix that

.gitignore

@@ -3,6 +3,7 @@
 .*.swo
 *.o
 *.so
+*.os
 *.d
 *.dump
 a.out

SConstruct

@@ -1 +1,8 @@
+AddOption('--test',
+          action='store_true',
+          help='build test files')
+
 SConscript('board/SConscript')
+
+if GetOption('test'):
+  SConscript('tests/safety/SConscript')

tests/safety/Makefile

@@ -1,18 +0,0 @@
-CC = clang
-CCFLAGS = -O3 -fPIC -DPANDA -I.
-
-.PHONY: all
-all: libpandasafety.so
-
-libpandasafety.so: test.o
-	$(CC) -shared -o '$@' $^ -lm
-
-test.o: test.c
-	@echo "[ CC ] $@"
-	$(CC) $(CCFLAGS) -MMD -c -I../../board -o '$@' '$<'
-
-.PHONY: clean
-clean:
-	rm -f libpandasafety.so test.o test.d
-
--include test.d

tests/safety/SConscript

@@ -0,0 +1,7 @@
+env = Environment(
+  CC='clang',
+  CXX='clang++',
+  CPPPATH=[".", "../../board"],
+)
+
+env.SharedLibrary("libpandasafety.so", ["test.c"])

tests/safety/libpandasafety_py.py

@@ -5,7 +5,7 @@ from cffi import FFI
 
 can_dir = os.path.dirname(os.path.abspath(__file__))
 libpandasafety_fn = os.path.join(can_dir, "libpandasafety.so")
-subprocess.check_call(["make"], cwd=can_dir)
+subprocess.check_call([f"scons -u -j{os.cpu_count()} --test ."], shell=True, cwd=can_dir)
 
 ffi = FFI()
 ffi.cdef("""