Re: [Starpu-devel] Building StarPU on Windows

[George Russell <george@codeplay.com>]

On 22/02/2011 15:06, Samuel Thibault wrote:
> George Russell, le Tue 22 Feb 2011 14:49:01 +0100, a écrit
> > checking for lib... no
> > checking for pthread_create in -lpthread... no
> > configure: error: pthread_create unavailable
> > imac:starpu-0.4 grrussel$ uname -a
> > Darwin imac.lan 10.6.0 Darwin Kernel Version 10.6.0: Wed Nov 10 18:13:17
> > PST 2010; root:xnu-1504.9.26~3/RELEASE_I386 i386
> > imac:starpu-0.4 grrussel$ less config.log
> > configure:14824: checking for pthread_create in -lpthread
> > configure:14849: gcc -o conftest -g -O2 -march=i686    conftest.c
> > -lpthread>&5
> > conftest.c:1: error: CPU you selected does not support x86-64
> > instruction set
> > configure:14849: $? = 1
> >
> >
> > It looks like the use of -march with GCC is the problem. I don't think
> > it is actually necessary, either.
> See the comment in configure.ac: it is necessary to get atomic ops. But
> in principle that should get only enabled on i386 (see the case
> statement). Is your machine i386 or x86-64, actually?  What does your
> gcc emit by default, 32bit or 64bit code?
>
> Samuel

Thats a complicated question; I believe the machine is indeed x86-64, 
and runs a mixture of 32bit and 64bit code (e.g. the OS user land is 
64bit, the kernel, not so; various legacy applications (e.g. from OSX 
10.5 or before, or those targetting 10.5 and 10.6 are 32bit).

The gcc configuration (and default output?) is shown below: I read that 
as targetting (compiling to) i686, so generating 32bit code, on an 
X86-64 host 64bit code host.

imac:~ grrussel$ gcc -v
Using built-in specs.
Target: i686-apple-darwin10
Configured with: /var/tmp/gcc/gcc-5664~105/src/configure 
--disable-checking --enable-werror --prefix=/usr --mandir=/share/man 
--enable-languages=c,objc,c++,obj-c++ 
--program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib 
--build=i686-apple-darwin10 --program-prefix=i686-apple-darwin10- 
--host=x86_64-apple-darwin10 --target=i686-apple-darwin10 
--with-gxx-include-dir=/include/c++/4.2.1
Thread model: posix
gcc version 4.2.1 (Apple Inc. build 5664)


Cheers,
George