#
# testExec
#
# To use, run the following commands:
#   make -f test.mk build
#   make -f test.mk debug
#
#

.PHONY :  generate_sources build clean run debug debug_tmp copy_tmp

#----------------------------------
# sources
#----------------------------------

NAME := test
MACOS_VER := $(word 2,$(subst ., , $(shell sw_vers -productVersion)))

ifeq (15,$(MACOS_VER))
  EXEC_NAME := testCompiledOnCatalina
else
  EXEC_NAME := testCompiledOnBigSur
endif

main.cpp :
	@echo "#include <stdio.h>" > $@
	@echo "#include \"$(NAME).hpp\"" >> $@
	@echo "int main() {" >> $@
	@echo '    printMe();\n' >> $@;
	@echo "}\n" >> $@
 
$(NAME).hpp :
	@echo "#include <iostream>" > $@
	@echo "void printMe();\n" >> $@
 
$(NAME).cpp : $(NAME).hpp
	@echo "#include \"$(NAME).hpp\"\n" > $@
	@echo "void printMe() {" >> $@
	@echo "    std::cout << \"This is the most basic program ever\" << std::endl;\n" >> $@
	@echo "}\n" >> $@

generate_sources : main.cpp $(NAME).hpp $(NAME).cpp

#----------------------------------
# build
#----------------------------------

CLANG := xcrun clang++

%.o : %.cpp
	@$(CLANG) -g -c $<

lib$(NAME).dylib : $(NAME).o
	@$(CLANG) -dynamiclib -single_module -install_name @rpath/$@ -o $@ $<

$(EXEC_NAME) : main.o lib$(NAME).dylib
	@$(CLANG) $< -o $@ -L. -l$(NAME)

build : clean generate_sources $(EXEC_NAME)

#----------------------------------
# run/debug
#----------------------------------

run :
	@env DYLD_LIBRARY_PATH=./ ./$(EXEC_NAME)
 
# $1 : exec path
define RUN_DEBUG
  @echo "\nOnce lldb starts, run these commands:"
  @echo "   (lldb) env DYLD_LIBRARY_PATH=./"
  @echo "   (lldb) b printMe"
  @echo "   (lldb) r\n"
  @echo "Starting debugger..."
  @xcrun lldb $(1)
endef
 
debug : $(if $(NOREBUILD),,clean build)
	$(call RUN_DEBUG,$(EXEC_NAME))

clean :
	@rm -f *.cpp *.hpp *.o *.dylib $(EXEC_NAME)