Memory listing from gcc

I've read the F manuals and I'm still no wiser... anyone know how I can 
get a memory usage listing from gcc (I'm using msp430-gcc)? I've tried 
-fmem-report, doesn't not do nowt.

Paul Burke

Paul Burke <paul@scazon.com> writes:

> I've read the F manuals and I'm still no wiser... anyone know how I
> can get a memory usage listing from gcc (I'm using msp430-gcc)? I've
> tried -fmem-report, doesn't not do nowt.

How about the "size" command? Or you can get detailed listings with
objdump. Both of these operate on the compiled object files.


-- 

John Devereux

John Devereux wrote:
> Paul Burke <paul@scazon.com> writes:
> 
>> I've read the F manuals and I'm still no wiser... anyone know how I
>> can get a memory usage listing from gcc (I'm using msp430-gcc)? I've
>> tried -fmem-report, doesn't not do nowt.
> 
> How about the "size" command? Or you can get detailed listings with
> objdump. Both of these operate on the compiled object files.
> 
You can get a map from the Linker: is that what you mean by a "usage 
listing"?

Paul Burke <paul@scazon.com> wrote:
> I've read the F manuals and I'm still no wiser... anyone know how I can 
> get a memory usage listing from gcc (I'm using msp430-gcc)? 

Generally you can't --- because it's not the job of gcc to decide
about memory usage.  That's done by the linker.  Get a map file,
and/or run 'size' or 'objdump' on the resulting files.

-- 
Hans-Bernhard Broeker (broeker@physik.rwth-aachen.de)
Even if all the snow were burnt, ashes would remain.

Paul Burke wrote:
> I've read the F manuals and I'm still no wiser... anyone know how I can 
> get a memory usage listing from gcc (I'm using msp430-gcc)? I've tried 
> -fmem-report, doesn't not do nowt.
> 
> Paul Burke


If you're looking for assembly listings try adding

   -Wa,-ahlms=myfile.lst

to the gcc compilation command line.


If you're looking for the big picture after linking,
get a linker map by adding

   -Wl,-Map=myfile.map,--cref

to the gcc command line performing the final link.

If the module cross-reference produces too much output,
use the simpler form

   -Wl,-Map=myfile.map


Please do not put any extra spaces in the switches or
they will be misunderstood by the toolchain.

HTH

-- 

Tauno Voipio
tauno voipio (at) iki fi

Tauno Voipio wrote:
> Paul Burke wrote:
> 
>> I've read the F manuals and I'm still no wiser... anyone know
>> how I can get a memory usage listing from gcc (I'm using
>> msp430-gcc)? I've tried -fmem-report, doesn't not do nowt.
> 
> If you're looking for assembly listings try adding
> 
>    -Wa,-ahlms=myfile.lst
> 
> to the gcc compilation command line.

I use:  gcc -gstabs+ -Wa,-ahldn -c | less

possibly with -Os, -O1, -O2 or -O3.  The output can be redirected
to a file if you want to keep it around.

> 
> If you're looking for the big picture after linking,
> get a linker map by adding
> 
>    -Wl,-Map=myfile.map,--cref
> 
> to the gcc command line performing the final link.
> 
> If the module cross-reference produces too much output,
> use the simpler form
> 
>    -Wl,-Map=myfile.map
> 
> Please do not put any extra spaces in the switches or
> they will be misunderstood by the toolchain.

-- 
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 the broken "Reply" link at the bottom of the article.  Click on 
 "show options" at the top of the article, then click on the 
 "Reply" at the bottom of the article headers." - Keith Thompson
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CBFalconer wrote:

> 
> I use:  gcc -gstabs+ -Wa,-ahldn -c | less

Thanks everyone. There seem to be more switches vavailable that there 
are chinese characters.

Paul Burke

Paul Burke wrote:
> CBFalconer wrote:
> 
>>
>> I use:  gcc -gstabs+ -Wa,-ahldn -c | less
> 
> 
> Thanks everyone. There seem to be more switches vavailable that there 
> are chinese characters.

Get the GNU assembler and linker documentation for these switches:

The gcc -Wa option passes the rest of the option
to the assembler (as or gas).

The same applies to the -Wl option, but the rest
is passed to the linker (ld).

HTH

-- 

Tauno Voipio
tauno voipio (at) iki fi