I came across some very interesting behavior regarding to built-in functions:
int __builtin_popcount( unsigned x ); is a gcc bult-in, which actually
returns the number of 1 bits in x.
int foo( unsigned x )
{
return __builtin_popcount( x );
}
generates a call to the __popcountsi2 f
Zoltán Kócsi writes:
> However:
>
>int (*bar( void ))( unsigned )
>{
> return __builtin_popcount;
>}
>
> returns the address of the label "__builtin_popcount", which does not exist:
>
>int main( int arcg, char *argv[] )
>{
> (void) argv;
> return (*bar())( ar
I'd like to have the cxx-mem-model branch considered for merging with
mainline before we end stage 1 for GCC 4.7.
What it is
==
GCC has had the __sync built-ins for atomic operations for a number of
years now. They implement a "sequential consistent" (AKA seq-cst)
synchronization mod
On 26 October 2011 16:38, Andrew MacLeod wrote:
> I'd like to have the cxx-mem-model branch considered for merging with
> mainline before we end stage 1 for GCC 4.7.
>
> What it is
> ==
>
> GCC has had the __sync built-ins for atomic operations for a number of years
> now. They implement
Hi,
Is it possible to compile a gnat cross compiler based on gcc 4.5.2
using my pre-installed gnat native compiler based on gcc 3.4.6 ? Or should I
try to build my own local native compiler based on gcc 4.5.2 ?
I ask the question because for the moment, I'm stuck with the following erro
> Whats left
> ===
> Functionality is pretty much complete, but there are a few minor lose
> ends still to deal with. They could be done after a merge, in the
> next stage, or required before... you tell me :-)
>
> - potentially implement -f[no]-inline-atomics (to never produce
> inline
On Wed, 26 Oct 2011, Andrew MacLeod wrote:
> Whats left
Out of interest, do you have any plans for the C1X side of things
(_Atomic, stdatomic.h etc.)? That would of course be for 4.8 or later.
--
Joseph S. Myers
jos...@codesourcery.com
> >> So, suggestions welcome. Is there a nice way to detect a signal frame?
That just makes me ask why are you're trying to detect a signal frame in the
first place?
> > Libunwind also reads the IP to detect signal frames on ARM Linux:
> > http://git.savannah.gnu.org/gitweb/?p=libunwind.git;a=b
The file tree-ssa-strlen.c causes several warnings when compiling the Go
library. The warnings look like:
../../../gccgo2/libgo/go/http/transport.go: In function
‘http.String.pN29_libgo_http.http.connectMethod’:
../../../gccgo2/libgo/go/http/transport.go:437:1: warning: offset outside
bounds of
> Is it possible to compile a gnat cross compiler based on gcc 4.5.2
> using my
> pre-installed gnat native compiler based on gcc 3.4.6 ? Or should I try
> to
> build my own local native compiler based on gcc 4.5.2 ?
You needed a matching native compiler first in order to build
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