On 02 May 2013, at 11:07, Graeme Geldenhuys wrote:
On 2013-05-02 09:43, Jonas Maebe wrote:
Lazarus and 64-bit FPC 2.6.0. I didn't want to read 10's of pages
on how to setup a cross compiler etc.
You don't have to read anything, it works exactly the same as a
regular compiler. Lazarus nor the compiler cares at all about what
architecture the compiler binary is.
I did initially try to use it with Lazarus IDE. I setup Lazarus IDE by
pointing it to the cross-compiler, then tried to compile my project.
It
failed - can't remember the error. In hindsight, it was probably
because
I failed to specify a Target and OS platform in the "Project
Options|Compiler Settings" - not sure.
Since the cross-compiler is the only official Win64 compiler we
distribute, I'd assume more people would have problems with it if it
wouldn't work out of the box with Lazarus.
The Mac OS X 64-bit compilers are also cross-compilers (although the
x86-64 binaries are actually a bit faster on Mac OS X, but it reduces
Any thoughts on why it is slower on Linux and Windows then? It is
just a
lack of compiler optimisation?
I don't know whether it's slower on Linux. In any case, a major
difference between Mac OS X and the other platforms is the on Mac OS
X, several performance-critical RTL routines are mapped to the system
C library, whose routines are tuned specifically for the cpu of the
current machine on Mac OS X (and which are in general probably also
more optimised than the routines which we have in our RTL).
Codegeneration-wise there is virtually no difference between Linux and
Mac OS X on x86-64. Win64 uses a different ABI, but I don't know
whether it is (much) less efficient.
Jonas
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