Re: help with makefile command line

[Kevin Rodgers]

stan wrote:
> Richard G Riley wrote:
> > "Balaji V. Iyer" <bviyer@xxxxxxxx> writes:
> >
> > > Hello Everyone,
> > >     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 thus I would lke the default line to be
> > >  
> > > "gcc -ansi -O4 -Wall <c_source_file>"
> > >  
> > > How do I do this?
> > >  
> > > 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))))))
> <snip>
>
> Seems like it might be easier to write a makefile :) 

You don't need to write a Makefile, because make has built-in rules that
handle this.

(add-hook 'c-mode-hook
          (lambda ()
            (set (make-local-variable 'compile-command)
                 (format "make %s"
                         (file-name-sans-extension
                          (file-name-nondirectory buffer-file-name))))))

Just set the CC=gcc and CFLAGs="-Wall -O3" environment variables, and voila!

--
Kevin Rodgers
Denver, Colorado, USA