Re: Profiling emacs.

[Stefan Monnier]

>> Today I tried to compile Emacs including the profiler like so:
>> 
>> CFLAGS=-pg LDFLAGS=-pg ./configure --without-x && make
>> 
>> Emacs creates a profile 
>> 
>> However, when I run ./emacs -Q it creates the same gmon.out at all the 
>> times, even if I run and make something in emacs a few seconds or 1 minute.
>> 
>> -rw-r--r-- 1 root root 4625 2009-03-25 11:45 gmon.out
>> 
>> Running
>> gprof emacs gmon.out | less
>> 
>> it shows just help information, nothing about the symbols of emacs.
>> 
>> Could you help me with some idea how to compile emacs includin the profiler?

> This is a commentary from emacs.c:

>   /* Set up for profiling.  This is known to work on FreeBSD,
>      GNU/Linux and MinGW.  It might work on some other systems too.
>      Give it a try and tell us if it works on your system.  To compile
>      for profiling, add -pg to the switches your platform uses in
>      CFLAGS and LDFLAGS.  For example:
>        `make CFLAGS="-pg -g -O -DPROFILING=1" LDFLAGS="-pg -g"'.  */

Yes, IIRC the -DPROFILING is the important one, otherwise only temacs
is profiled.


        Stefan