Date: Tue, 01 Dec 1998 12:24:01 -0500 From: "Steve Friedrich" <SteveFriedrich@Hot-Shot.com> To: "Schumacher Christoph" <chris_schumacher@t-online.de> Cc: "FreeBSD Questions" <freebsd-questions@FreeBSD.ORG> Subject: Re: makefile Message-ID: <199812011726.MAA18384@laker.net>
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On Tue, 01 Dec 1998 15:48:08 +0100, Schumacher Christoph wrote: >Im using BSD 2.2.6 and id like to write programs to learn programing (logicaly) >Now i got a Makefile of my University, bur they say its a global makefile >for all unix' >I attached it. it neither works with gmake nor make....but i dont know why..?? >Could you help me ?? I don't understand why you got their Makefile... If you're trying to learn programming, you don't HAVE to use Makefiles, they just simplify a *build* process. What computer language are you attempting to learn? The FIRST program you should write in ANY language is one that simply outputs a message to the screen. Learning how to do this allows you to display *debug* messages from your programs, showing what variables are set to, output messages indicating how far the program has gotten, etc. If you are familiar with the famous "Hello, world" program from Kernighan and Ritchie's "The C Programming Language", here's a simple Makefile: Assumptions: You have a C compiler/environment installed on your computer You have the K&R "Hello, world" source in hello.c Makefile: hello: hello.c Makefile cc hello.c -o hello The first line in the Makefile, "hello: hello.c Makefile" contains the make target, i.e., "hello" and it's dependancies, i.e., "hello.c Makefile" So what make does, is it looks at the date/time stamp on hello, hello.c, and Makefile. If hello.c and/or Makefile has a *newer* time stamp than hello, it will process the commands following the target/dependancy line. In this case, it invokes the C compiler. You use the Makefile by invoking the following command at a shell prompt: make hello You can read more in the man pages for cc and make: man make man cc You could get a book on make from O'Reilly at http://www.ora.com/ Unix systems measure "uptime" in years, Winblows measures it in minutes. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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