#COPYRIGHT Hova
#VERSION 2.0

#Detecting your operating system
UNAME=$(shell uname) #Calling shell command "uname"
ifeq ($(UNAME), Darwin) #Checking if MacOS
        CC=clang #Compiler/linker in use
        UNIFLAGS=-pedantic -Wall -fsanitize=address -g #Universal flags
endif

ifneq (,$(filter $(UNAME), Linux FreeBSD)) #Checking if Linux or FreeBSD
        CC=gcc #Compiler/linker in use
        UNIFLAGS=-pedantic -Wall -g #Universal flags
endif

#Other parameters indifferent to OS
SRCDIRS=src src/parse #Source directories and subdirectories
CFLAGS=-c #Compiler flags
BUILDDIR=build #Object files' directory
LNFLAGS=-o #Linker flags
DISTDIR=dist #Executable's directory
SRCEXT=.c #Source files' extension
OBJEXT=.o #Object files' extension
EXECUTABLE=myshell #Executable's name

#Build prosess itself
all: *$(OBJEXT) #Final linking
        mkdir -p $(DISTDIR)
        $(CC) $(BUILDDIR)/$^ $(UNIFLAGS) $(LNFLAGS) $(DISTDIR)/$(EXECUTABLE)

*$(OBJEXT): build #Building object files
        mkdir -p $(BUILDDIR)
        mv $@ $(BUILDDIR)

build: $(SRCDIRS) #Compiling source
        for dir in $^; do $(CC) $$dir/*$(SRCEXT) $(UNIFLAGS) $(CFLAGS); done

clean: #Removing object files
        rm -rf $(BUILDDIR)

.PHONY: build clean #Making these targents independent from files