From: "Rick Mann" <rmann@xxxxxxxxxxxxxxx>
On Dec 17, 2007, at 4:59 PM, NightStrike wrote:
Why would binaries on different platforms be identical?
The toolchain on each host platform is built with identical steps, from
the same source distro, targetting an embedded Xscale processor.
The source code does not use any OS APIs, just some things in newlib
(built as part of the toolchain).
So you might think.
However, it's easy for code to become polluted by stuff from the build
machine.
I knows this from experience, having developed a cross-compiled Linux
distribution from scratch.
In one case I had a failure because some /usr/include header got included,
and as a result, inline asm's routines for x86 were being mixed into MIPS
code.
Make sure your GCC is properly sysrooted so it's not picking up local header
files, etc.
The resulting binary should, in theory, be identical, regardless of the
host platform.
And of course the input to the compiler after all header file inclusion and
preprocessing should also be the same.
Here is something to try: compile your code with -E in both environments to
capture the raw preprocessor output. You don't want any differences there,
that's for sure.
