Enable parallel build and test

Makefile

@@ -9,6 +9,18 @@ YACC = bison
 # -d: generate header with default name
 YFLAGS = --verbose --debug -d
 
+# number of jobs to run
+NPROCS := 1
+OS := $(shell uname -s)
+# Find available processor numbers based on different OS.
+ifeq ($(OS),Linux)
+  NPROCS := $(shell grep -c ^processor /proc/cpuinfo)
+else ifeq ($(OS),Darwin)
+  NPROCS := $(shell sysctl -n hw.ncpu)
+endif # $(OS)
+# Specify the number of jobs to run simultaneously.
+MAKEFLAGS += -j$(NPROCS)
+
 # Note that lex.yy.cpp is excluded deliberately, as "lex.yy.cpp" is considered a
 # header file (it's included by "y.tab.cpp").
 OBJS := $(shell find . -name "*.cpp" ! -name "y.tab.cpp" ! -name "lex.yy.cpp" ) y.tab.o
@@ -20,7 +32,7 @@ DEPS = $(OBJS:.o=.d)
 all: $(TARGET)
 
 test: $(TARGET)
-	make -C test/
+	cd test/ && $(MAKE) MAKEFLAGS=
 
 $(TARGET): $(OBJS)
 	$(CXX) $(CXXFLAGS) $(OBJS) -o $@
@@ -42,6 +54,6 @@ main.o: %.o: %.cpp y.tab.hpp
 
 clean:
 	rm -rf *.s *.o lex.yy.* y.tab.* *.output *.ssa $(TARGET) $(OBJS) $(DEPS)
-	make -C test/ clean
+	cd test/ && $(MAKE) clean MAKEFLAGS=
 
 -include $(DEPS)

test/Makefile

@@ -1,7 +1,7 @@
 .PHONY: test clean
 
 test:
-	turnt **/*.c --diff
+	turnt **/*.c --diff -j
 
 clean:
 	rm -f *.s **/*.s *.o **/*.o *.ssa **/*.ssa

test/codegen/turnt.toml

@@ -1,2 +1,2 @@
-command = "../../vitaminc -o test.ssa < {filename} && qbe -o out.s test.ssa && cc out.s -o a.o && ./a.o; echo $?"
+command = "../../vitaminc -o {filename}.ssa < {filename} && qbe -o {filename}.s {filename}.ssa && cc {filename}.s -o {filename}.o && ./{filename}.o; echo $?"
 output.exp = "-"