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 <> 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 <> 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 <> 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 ()
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
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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