From: Jamie Lokier <jamie@shareable.org>
To: Bernd Petrovitsch <bernd@firmix.at>
Cc: Alexander Neundorf <neundorf@eit.uni-kl.de>,
linux-embedded@vger.kernel.org
Subject: Re: cross-compiling alternatives
Date: Fri, 13 Jun 2008 14:17:54 +0100 [thread overview]
Message-ID: <20080613131753.GA19549@shareable.org> (raw)
In-Reply-To: <1213351433.17853.61.camel@tara.firmix.at>
Bernd Petrovitsch wrote:
> Actually the size of ints (or any other type) can be easily deduced
> without running a (for the target) compiled binary:
> - compile the binary (for the target) with an initialized variable with
> that value.
> - use cross nm (or a similar tool) to read it from there.
Or the method autoconf uses - binary search, using a compile-time
numeric comparison which resolves to a successful or failed compile.
That seems more portable to me.
Relying on 'nm 'finding the variable, and not accidentally matching
another variable with the wrong value, does not work for all C
environments. E.g. some compile to compressed executables; some
produce intermediate objects with incomplete or lazy compiles or
symbolic, to be finished at link stage, and some are even more
abstract.
And it requires the 'nm' tool, which you might not have for
cross-compilation, or might not find the right one.
-- Jamie
next prev parent reply other threads:[~2008-06-13 13:17 UTC|newest]
Thread overview: 182+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1209577322.25560.402.camel@pmac.infradead.org>
[not found] ` <87bq3rgq40.fsf@basil.nowhere.org>
[not found] ` <1209582709.25560.441.camel@pmac.infradead.org>
[not found] ` <1209582709.25560.441.camel-ZP4jZrcIevRpWr+L1FloEB2eb7JE58TQ@public.gmane.org>
2008-05-28 21:52 ` [PATCH 0/1] Embedded Maintainer(s), linux-embedded@vger list Rob Landley
2008-06-09 21:27 ` Leon Woestenberg
2008-06-10 3:53 ` Rob Landley
2008-06-10 4:30 ` Sam Ravnborg
2008-06-10 6:55 ` Rob Landley
2008-06-10 7:54 ` Sam Ravnborg
2008-06-10 9:09 ` Wolfgang Denk
2008-06-10 13:12 ` Jamie Lokier
2008-06-10 13:25 ` Will Newton
2008-06-10 13:33 ` David Woodhouse
2008-06-10 13:47 ` Will Newton
2008-06-10 13:53 ` David Woodhouse
2008-06-10 14:00 ` Grant Likely
2008-06-10 14:01 ` Wolfgang Denk
2008-06-10 14:29 ` Jamie Lokier
2008-06-11 5:34 ` Rob Landley
2008-06-10 13:49 ` Wolfgang Denk
2008-06-11 5:25 ` Rob Landley
2008-06-12 18:18 ` Enrico Weigelt
2008-06-12 18:55 ` Wolfgang Denk
2008-06-12 20:55 ` Enrico Weigelt
2008-06-15 21:48 ` Rob Landley
2008-06-17 14:11 ` Enrico Weigelt
2008-06-10 13:47 ` Wolfgang Denk
2008-06-10 10:20 ` Jamie Lokier
2008-06-10 10:36 ` Adrian Bunk
2008-06-10 10:50 ` Sam Ravnborg
2008-06-11 5:28 ` Paul Mundt
2008-06-10 17:36 ` Tim Bird
2008-06-11 3:35 ` Rob Landley
2008-06-11 5:47 ` Greg Ungerer
2008-06-12 0:41 ` Rob Landley
2008-06-12 7:55 ` Jamie Lokier
2008-06-12 15:23 ` cross-compiling alternatives (was Re: [PATCH 0/1] Embedded Maintainer(s)...) Tim Bird
2008-06-12 15:50 ` David Woodhouse
2008-06-12 16:05 ` Mike Frysinger
2008-06-12 16:08 ` David Woodhouse
2008-06-12 16:15 ` Mike Frysinger
2008-06-12 16:12 ` Robert P. J. Day
2008-06-13 0:25 ` Rob Landley
2008-06-13 1:22 ` Bill Gatliff
2008-06-13 6:55 ` Alexander Neundorf
2008-06-13 15:06 ` Enrico Weigelt
2008-06-13 7:04 ` David Woodhouse
2008-06-13 15:02 ` linux-embedded-owner
2008-06-13 17:00 ` David Woodhouse
2008-06-13 17:12 ` Bill Traynor
2008-06-13 18:44 ` Tim Bird
2008-06-13 18:55 ` Sam Ravnborg
2008-06-13 19:00 ` Bill Traynor
2008-06-13 19:43 ` Johannes Stezenbach
2008-06-13 17:30 ` Makefile debugger linux-embedded-owner
2008-06-13 8:50 ` cross-compiling alternatives Bernd Petrovitsch
2008-06-13 9:11 ` Alexander Neundorf
2008-06-13 14:51 ` cross-compiling alternatives (was Re: [PATCH 0/1] Embedded Maintainer(s)...) Enrico Weigelt
2008-06-16 7:58 ` Alexander Neundorf
2008-06-16 16:00 ` Enrico Weigelt
2008-06-16 17:38 ` Adrian Bunk
2008-06-17 13:57 ` Enrico Weigelt
2008-06-13 11:14 ` Geert Uytterhoeven
2008-06-13 11:22 ` Bart Van Assche
2008-06-12 18:29 ` Josh Boyer
2008-06-12 19:02 ` Mike Frysinger
2008-06-13 13:29 ` Josh Boyer
2008-06-13 13:59 ` Josh Boyer
2008-06-12 16:08 ` Paul Mundt
2008-06-12 16:28 ` Bill Gatliff
2008-06-12 16:31 ` Paul Mundt
2008-06-12 16:38 ` Mike Frysinger
2008-06-12 18:50 ` Bernhard Fischer
2008-06-12 17:14 ` Bill Gatliff
2008-06-12 17:22 ` Mike Frysinger
2008-06-12 17:23 ` Sam Ravnborg
2008-06-13 18:01 ` Rob Landley
2008-06-12 16:37 ` David Woodhouse
2008-06-12 17:01 ` Adrian Bunk
2008-06-12 17:19 ` Bill Gatliff
2008-06-12 17:17 ` Bill Gatliff
2008-06-13 11:15 ` Geert Uytterhoeven
2008-06-13 11:17 ` David Woodhouse
2008-06-12 18:34 ` Enrico Weigelt
2008-06-12 19:00 ` Bill Gatliff
2008-06-15 21:51 ` Rob Landley
2008-06-12 18:30 ` Enrico Weigelt
2008-06-12 18:57 ` Wolfgang Denk
2008-06-12 16:23 ` Tim Bird
2008-06-12 18:37 ` Enrico Weigelt
2008-06-13 18:45 ` Robert Schwebel
2008-06-15 23:12 ` Enrico Weigelt
2008-06-16 8:02 ` Alexander Neundorf
2008-06-16 8:28 ` cross-compiling alternatives Bernd Petrovitsch
2008-06-16 9:25 ` Alexander Neundorf
2008-06-13 1:25 ` cross-compiling alternatives (was Re: [PATCH 0/1] Embedded Maintainer(s)...) Rob Landley
2008-06-13 1:28 ` Robert P. J. Day
2008-06-13 1:29 ` Mike Frysinger
2008-06-13 6:30 ` Alexander Neundorf
2008-06-13 18:51 ` Robert Schwebel
2008-06-13 22:25 ` Jamie Lokier
2008-06-13 23:19 ` Robert Schwebel
2008-06-14 0:07 ` Jamie Lokier
2008-06-14 11:26 ` Robert Schwebel
2008-06-16 11:39 ` Jamie Lokier
2008-06-16 12:06 ` Alexander Neundorf
2008-06-16 13:32 ` Jamie Lokier
2008-06-16 16:28 ` Bernhard Fischer
2008-06-16 22:28 ` Jamie Lokier
2008-06-16 22:44 ` Adrian Bunk
2008-06-16 5:11 ` Enrico Weigelt
2008-06-16 11:33 ` Jamie Lokier
2008-06-16 8:33 ` cross-compiling alternatives Bernd Petrovitsch
2008-06-16 11:17 ` Jamie Lokier
2008-06-16 11:43 ` Bernd Petrovitsch
2008-06-16 7:55 ` cross-compiling alternatives (was Re: [PATCH 0/1] Embedded Maintainer(s)...) Alexander Neundorf
2008-06-16 15:15 ` Enrico Weigelt
2008-06-17 6:27 ` Alexander Neundorf
2008-06-17 13:46 ` Enrico Weigelt
2008-06-17 14:22 ` Alexander Neundorf
2008-06-16 4:57 ` Enrico Weigelt
2008-06-16 11:44 ` Jamie Lokier
2008-06-16 4:31 ` Enrico Weigelt
2008-06-16 8:13 ` Alexander Neundorf
2008-06-16 8:21 ` cross-compiling alternatives Bernd Petrovitsch
2008-06-13 3:11 ` cross-compiling alternatives (was Re: [PATCH 0/1] Embedded Maintainer(s)...) Sam Ravnborg
2008-06-13 18:47 ` Robert Schwebel
2008-06-13 6:43 ` Alexander Neundorf
2008-06-13 8:38 ` Bernd Petrovitsch
2008-06-13 9:06 ` Alexander Neundorf
2008-06-13 9:12 ` David Woodhouse
2008-06-13 9:32 ` Alexander Neundorf
2008-06-13 15:28 ` Enrico Weigelt
2008-06-14 0:31 ` Jamie Lokier
2008-06-16 4:23 ` Enrico Weigelt
2008-06-16 10:49 ` Jamie Lokier
2008-06-16 11:09 ` David Woodhouse
2008-06-16 11:52 ` Jamie Lokier
2008-06-16 11:59 ` David Woodhouse
2008-06-16 16:43 ` Bernhard Fischer
2008-06-13 10:03 ` cross-compiling alternatives Bernd Petrovitsch
2008-06-13 11:24 ` Alexander Neundorf
2008-06-13 13:17 ` Jamie Lokier [this message]
2008-06-13 13:28 ` Bernd Petrovitsch
2008-06-13 13:40 ` Alexander Neundorf
2008-06-13 13:56 ` Matthieu CASTET
2008-06-13 14:41 ` Enrico Weigelt
2008-06-13 14:49 ` Jamie Lokier
2008-06-13 14:51 ` Enrico Weigelt
2008-06-13 14:55 ` Enrico Weigelt
2008-06-13 15:16 ` Enrico Weigelt
2008-06-13 18:45 ` Bernd Petrovitsch
2008-06-13 19:10 ` Robert Schwebel
2008-06-16 4:08 ` Enrico Weigelt
2008-06-16 7:31 ` Peter Korsgaard
2008-06-16 14:33 ` Enrico Weigelt
2008-06-16 16:45 ` Bernhard Fischer
2008-06-13 19:14 ` cross-compiling alternatives (was Re: [PATCH 0/1] Embedded Maintainer(s)...) Rob Landley
2008-06-13 15:25 ` Enrico Weigelt
2008-06-12 18:25 ` [PATCH 0/1] Embedded Maintainer(s), linux-embedded@vger list Enrico Weigelt
2008-06-12 21:11 ` David VomLehn
2008-06-12 21:42 ` James Chapman
2008-06-12 21:46 ` Mike Frysinger
2008-06-12 21:53 ` Tim Bird
2008-06-12 21:56 ` Mike Frysinger
2008-06-13 8:39 ` James Chapman
2008-06-13 9:02 ` Daniel THOMPSON
2008-06-13 11:28 ` James Chapman
2008-06-12 22:02 ` Jim Freeman
2008-06-13 13:14 ` Samuel Robb
2008-06-13 14:36 ` Enrico Weigelt
2008-06-13 14:26 ` Enrico Weigelt
2008-06-13 22:24 ` David VomLehn
2008-06-15 15:39 ` Leon Woestenberg
2008-06-15 21:43 ` Rob Landley
2008-06-23 17:22 ` Denys Vlasenko
2008-06-23 18:57 ` Sam Ravnborg
2008-06-23 19:12 ` Denys Vlasenko
2008-06-23 19:33 ` Sam Ravnborg
[not found] ` <1209636171.25560.508.camel@pmac.infradead.org>
[not found] ` <20080501104158.GM20451@one.firstfloor.org>
2008-06-23 17:28 ` Denys Vlasenko
2008-06-23 17:45 ` Adrian Bunk
2008-06-23 18:19 ` Denys Vlasenko
2008-06-23 19:05 ` Tim Bird
2008-06-25 9:50 ` James Chapman
2008-06-25 15:41 ` Adrian Bunk
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