added pgo target

Makefile

@@ -39,6 +39,16 @@ OBJ_C   = $(addprefix obj/c/,$(SRC_C:.c=.o))
 OBJ_CXX = $(addprefix obj/cxx/,$(SRC_CXX:.cpp=.o))
 OBJ = $(OBJ_C) $(OBJ_CXX)
 
+PGO_OBJ_C   = $(addprefix obj/pgo/c/,$(SRC_C:.c=.o))
+PGO_OBJ_CXX = $(addprefix obj/pgo/cxx/,$(SRC_CXX:.cpp=.o))
+PGO_OBJ = $(PGO_OBJ_C) $(PGO_OBJ_CXX)
+
+PGO_ITERATIONS=5
+PGO_SET_LOC?=/tmp/$(PROJECT)-pgo
+
+PGO_FLAGS  = -fprofile-generate
+PGO_LDFLAGS=
+
 # Phonies
 
 .PHONY: release
@@ -47,14 +57,16 @@ release: | dirs $(PROJECT)-release
 .PHONY: debug
 debug: | dirs $(PROJECT)-debug
 
+.PHONY: pgo
+pgo: | dirs $(PROJECT)-pgo
+
 .PHONY: test
 test: test-all
 
 # Targets
 
 dirs:
-	@mkdir -p obj/c{,xx}/src
-	@mkdir -p obj/cxx/src/rng
+	@mkdir -p obj/{pgo/,}c{,xx}/src{,/rng}
 
 obj/c/%.o: %.c
 	$(CC) -c $< $(CFLAGS) -o $@ $(LDFLAGS)
@@ -62,6 +74,12 @@ obj/c/%.o: %.c
 obj/cxx/%.o: %.cpp
 	$(CXX) -c $< $(CXXFLAGS) -o $@ $(LDFLAGS)
 
+obj/pgo/c/%.o: %.c
+	$(CC) -c $< $(CFLAGS) $(PGO_FLAGS) -o $@ $(LDFLAGS) $(PGO_LDFLAGS)
+
+obj/pgo/cxx/%.o: %.cpp
+	$(CXX) -c $< $(CXXFLAGS) $(PGO_FLAGS) -o $@ $(LDFLAGS) $(PGO_LDFLAGS)
+
 
 $(PROJECT)-release: CFLAGS+= $(RELEASE_CFLAGS)
 $(PROJECT)-release: CXXFLAGS += $(RELEASE_CXXFLAGS)
@@ -76,11 +94,49 @@ $(PROJECT)-debug: LDFLAGS += $(DEBUG_LDFLAGS)
 $(PROJECT)-debug: $(OBJ)
 	$(CXX) $^ $(CXXFLAGS) -o $@ $(LDFLAGS)
 
+pgo-generate: CFLAGS+= $(RELEASE_CFLAGS)
+pgo-generate: CXXFLAGS += $(RELEASE_CXXFLAGS)
+pgo-generate: LDFLAGS += $(RELEASE_LDFLAGS)
+pgo-generate: $(PGO_OBJ)
+	$(CXX) $^ $(CXXFLAGS) $(PGO_FLAGS) -o $@ $(LDFLAGS) $(PGO_LDFLAGS)
+
+pgo-reset:
+	find ./obj/pgo -name \*.gcda -exec rm {} +
+
+pgo-profile: | pgo-reset pgo-generate
+	mkdir -p $(PGO_SET_LOC)
+	for i in {1..$(PGO_ITERATIONS)}; do \
+		dd if=/dev/urandom of=$(PGO_SET_LOC)/small bs=1024 count=1 >> /dev/null 2>&1; \
+		printf "Iteration $$i / $(PGO_ITERATIONS)\r"; \
+		./pgo-generate -s $(PGO_SET_LOC)/small >>/dev/null; \
+		./pgo-generate -u $(PGO_SET_LOC)/small >>/dev/null; \
+		./pgo-generate -h >> /dev/null; \
+		FCNT=1 ./test.sh ./pgo-generate >>/dev/null; \
+		FCNT=2 ./test.sh ./pgo-generate >>/dev/null; \
+		FCNT=3 ./test.sh ./pgo-generate >>/dev/null; \
+		FCNT=4 ./test.sh ./pgo-generate >>/dev/null; \
+	done 
+	rm -rf $(PGO_SET_LOC)
+	rm pgo-generate
+
+pgo-use: PGO_FLAGS = -fprofile-use
+pgo-use: PGO_LDFLAGS = -lgcov -fprofile-use
+pgo-use: CFLAGS+= $(RELEASE_CFLAGS)
+pgo-use: CXXFLAGS += $(RELEASE_CXXFLAGS)
+pgo-use: LDFLAGS += $(RELEASE_LDFLAGS)
+pgo-use: $(PGO_OBJ)
+	$(CXX) $^ $(CXXFLAGS) $(PGO_FLAGS) -o $@ $(LDFLAGS) $(PGO_LDFLAGS)
+
+$(PROJECT)-pgo: | pgo-profile
+	find ./obj/pgo -name \*.o -exec rm {} +
+	$(MAKE) pgo-use
+	mv pgo-use $@
+
 clean-rebuild:
 	rm -rf obj
 
 clean: clean-rebuild
-	rm -f $(PROJECT)-{release,debug}
+	rm -f $(PROJECT)-{release,debug,pgo}
 
 test-all:
 	@./test.sh ./$(PROJECT)-*