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From: smfst2@unix.cis.pitt.edu (Seth M Fuller)
Newsgroups: comp.unix.questions,comp.databases
Subject: Re: Preprocessor dependencies in MAKE
Summary: Make dependencies
Keywords: make preprocessor dependency sql ingres c
Message-ID: <140669@unix.cis.pitt.edu>
Date: 17 Jun 91 13:49:32 GMT
References: <2331@prodigal.dwrsun2.UUCP>
Organization: Univ. of Pittsburgh, Computing & Information Services
Lines: 25

In article <2331@prodigal.dwrsun2.UUCP> perl@dwrsun2.UUCP (Robert Perlberg) writes:
>	.sc.o:
>		esqlc $*.sc
>		$(CC) $(CFLAGS) -c $*.c
>
>it works the first time, but then if I modify runme.sc and run make it
>says "`runme' is up to date".
>
>I don't want to remove the `.c' file after compiling since it's needed
>if I want to debug the program with dbx.  How do I do this?

The problem is that you have eliminate make's knowledge of how to create
a .o file from a .c file. You do this with the .SUFFIXES statement  before
your rules statement. The empty .SUFFIXES statement eliminates make's 
knowledge of all the suffixes it usually knows. I use the following for 
4GL code and it works fine.

.SUFFIXES:
.SUFFIXES: .4gl .per .frm .c .o

If you have any purely C files you want to make in this directory you
will have to create a .c.o rule after your .sc.o rule.

Seth M. Fuller