[fpc-devel] Small virtual machine to cross compile FPC
DrDiettrich1 at aol.com
Sat Nov 1 08:13:41 CET 2014
Paul Breneman schrieb:
>> I think 100Mb is a bit small.
>> You'll need cross-binutils, X, cross-dev libs and whatnot.
>> 650Mb would be feasable, I guess.
> Thanks for that info, but couldn't most of that be download into the VM
> *after* it is running? Seems to me I'd like the *smallest* VM and then
> have a way to load things into that standard PC. But maybe I'm thinking
> wrongly? If so please help me get it right.
I don't understand why the VM *size* should matter - unless it's >30GB
for current Windows versions. My goal would be a *simple* OS, easy to
configure and manage, and then install into it whatever is required. Why
download and configure all the required tools whenever the VM is run?
This may take half an day, to get the VM up for cross-development, and
the downloads end up on the virtual disk as well.
For cross-development I'd install a network of dedicated target VMs, one
of which can host the project files, and then build the project in every
target VM. This would allow for parallel builds, and every created
executable can be tested immediately on its platform - also in parallel
for comparison of the GUI and operation. With a single development VM
you would need another VM or emulator to perform the final checks, for
every single target platform.
> I've looked at (or tried) laz4android and fpcup. Seems that such an
> approach would work much better on a "standard" PC?
Virtual machines work well on the same hardware (CPU), but for other
targets (ARM instead of x86) an emulator is required. Wikipedia says
that a LiveCD and AndroVM with Android for x86 is available, where it
might be possible to develop Android applications somewhat "natively" on
an x86 machine. But finally an emulator or physical device is required,
where the cross-compiled programs can run on their target CPU, using the
according libraries (RTL, VCL... for ARM).
Please don't ask me about Adroid, my experience is limited to
FPC/Lazarus development on various Windows and Linux VMs, and I never
tried to cross-compile myself. Why cross-compile when I cannot check the
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