Basic Makefile and header dependencies

I am new to makefiles and I am a bit stuck. I have two c source files called trade.c and report.c . They both depend on a file called acc.h. The acc.h file is composed of two other header files, users.h and resellers.h. I am wondering how you write the dependency of the two head开发者_运维问答er files to the acc.h file. I have so far...

OBJECTS = trade.c report.c
CC = gcc

trading: $(OBJECTS)
        $(CC) $(OBJECTS) -o trading

trade.o: trade.c accts.h
        $(CC) -c trade.c

report.o: report.c accts.h
        $(CC) -c report.c

Any help is greatly appreciated.

You have no other choice than to add all the header files in the dependency list for the object file, as follows.

trade.o: trade.c accts.h users.h resellers.h
        $(CC) -c trade.c

In all professional settings I've seen with makefiles, the dependencies were not added manually -- excepted for special cases involving tools like lex and yacc -- but created automatically, either using options of the compiler (like -MM of gcc), or by using various independent tools like makedepend or mkdep.