Re: help with makefile command line

[Eli Zaretskii]

> From: "Balaji V. Iyer" <bviyer@ncsu.edu>
> Date: Tue, 25 Mar 2008 09:09:56 -0400
> 
>     I use the compile option extenstively in emacs. When I type "M-x
> compile" the default line is "make -k" Many times I do not have a make
> file

You don't need a Makefile to perform simple tasks, because Make knows
a lot of built in rules out of the box.  For example, to compile a .c
source file foo.c into a program foo, all you need is say "make -k foo", 
and Make will do it even without a Makefile.

> thus I would lke the default line to be
>  
> "gcc -ansi -O4 -Wall <c_source_file>"
>  
> How do I do this?

Customize the variable compile-command.

> I tried the following command but it doesn't seem to work (If anyone
> have a better idea please let me know).
>  
> (function
>  (lambda ()
>    (unless (or (file-exists-p "makefile")
>                (file-exists-p "Makefile"))
>      (setq compile-command
>            (concat "gcc -Wall -O3 -o"
>                    (file-name-sans-extension (file-name-nondirectory
> buffer-file -name))
>                    " "
>                    (file-name-nondirectory buffer-file-name))))))

Where did you put this and how did you use it?