Help with makefile command line

Help with makefile command line

[Balaji V. Iyer]

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))))))
 
 
 
Any help is greatly appreciated.

Oh, one thing..I am using emacs 21.2.1 on cygwin
 
Thanks,
 
-- 
 
Balaji V. Iyer
PhD Student,
Center for Efficient, Scalable and Reliable Computing, Department of
Electrical and Computer Engineering, North Carolina State University.

Re: Help with makefile command line

[Mike Mattie]

[-- Attachment #1: Type: text/plain, Size: 1546 bytes --]

On Tue, 25 Mar 2008 09:11:58 -0400
"Balaji V. Iyer" <bviyer@ncsu.edu> wrote:

> 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
   ^^^ defun
>  (lambda ()
>    (unless (or (file-exists-p "makefile")
                                 ^^
                                 strange?
>                (file-exists-p "Makefile"))
>      (setq compile-command
       ^^^
       why modify a variable each time ? pass as an argument function ?
>            (concat "gcc -Wall -O3 -o"
>                    (file-name-sans-extension (file-name-nondirectory
> buffer-file -name))
             ^^
             broken ?

>                    " "
>                    (file-name-nondirectory buffer-file-name))))))
                      ^^^
                      computed twice, should bind.
>  
>  
>  
> Any help is greatly appreciated.

also concatenating arguments means that some external shell is going to have to split the args again,
usually better (no quoting issues), to simply pass off the arguments to exec without invoking the shell
if you can.

Hope that helps a bit.

> Oh, one thing..I am using emacs 21.2.1 on cygwin
>  
> Thanks,
>  

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

Re: Help with makefile command line

[Andreas Schwab]

"Balaji V. Iyer" <bviyer@ncsu.edu> 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?

Note that you can run make even without a makefile.  There are builtin
default rules that allows you to type "make foo.o" to create foo.o from
foo.c.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Re: Help with makefile command line

[Stefan Monnier]

> "gcc -ansi -O4 -Wall <c_source_file>"
 
> How do I do this?
 
C-h v compile-command RET


        Stefan