Anyone know how to compile with profiling when using libtool?

Anyone know how to compile with profiling when using libtool?

[Rob Browning]

Though I can augment CFLAGS so that each .c file is compiled with -g
-pg, I haven't figured out a way to keep libtool from removing -pg
from the link line.  It seems like libtool is removing -pg (and
-no-undefined, etc.) from the gcc command line just before issuing the
link command.

If at all possible, I'd rather not have it second guess me for at
least some of the options...

-- 
Rob Browning
rlb @defaultvalue.org, @linuxdevel.com, and @debian.org
Previously @cs.utexas.edu
GPG starting 2002-11-03 = 14DD 432F AE39 534D B592  F9A0 25C8 D377 8C7E 73A4


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Re: Anyone know how to compile with profiling when using libtool?

[Kevin Ryde]

Rob Browning <rlb@defaultvalue.org> writes:
>
> Though I can augment CFLAGS so that each .c file is compiled with -g
> -pg, I haven't figured out a way to keep libtool from removing -pg
> from the link line.  It seems like libtool is removing -pg (and
> -no-undefined, etc.) from the gcc command line just before issuing the
> link command.

One workaround is to make a script "my-gcc-pg" which just execs gcc
-pg, and use that by configuring with CC=my-gcc-pg.  I think libtool
recognises gcc based on preprocessor defines, so the name of the
script hopefully doesn't matter.

To do it directly with libtool you can insinuate -Wc,-pg into the
flags, by overriding LDFLAGS or guile_LDFLAGS or whatever.

> If at all possible, I'd rather not have it second guess me for at
> least some of the options...

Rumour has it the next libtool will leave alone anything it doesn't
recognise.


Incidentally, http://sourceforge.net/projects/fnccheck is quite a nice
profiler, based on gcc -finstrument-functions.  It uses the i586 rdtsc
to record function entry and exit, so it's a lot more accurate than
10ms sampling by prof.


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