On 05.01.2014 06:45, Tijl Coosemans wrote:
On Sun, 5 Jan 2014 00:43:28 +0000 (UTC) Pedro F. Giffuni wrote:
Author: pfg
Date: Sun Jan 5 00:43:28 2014
New Revision: 260311
URL: http://svnweb.freebsd.org/changeset/base/260311
Log:
gcc: Add support for Apple's Block extension
Block objects [1] are a C-level syntactic and runtime feature. They
are similar to standard C functions, but in addition to executable
code they may also contain variable bindings to automatic (stack)
or managed (heap) memory. A block can therefore maintain a set of
state (data) that it can use to impact behavior when executed.
This port is based on Apple's GCC 5646 with some bugfixes from
Apple GCC 5666.3. It has some small differences with the support
in clang, which remains the recommended compiler.
Perhaps the most notable difference is that in GCC that __block
is not actually a keyword, but a macro. There will be workaround
for this issue in a near future. Other issues can be consulted in
the clang documentation [2]
For better compatiblity with Apple's GCC and llvm-gcc some related
fixes and features from Apple have been included. Support for the
non-standard nested functions in GCC is now off by default.
Some ports use nested functions.
We now have the Apple-GCC compatible -fnested-functions,
however, this is of little relevance because on FreeBSD 10+
the default compiler (clang) doesn't support them at all.
Most such ports should already be using the fsf gcc but
I am not going to find out which do or dont; I simply won't
merge this to 9 until there is a good reason to do it. *
Pedro.
*Anyone working on a GCD-enabled version of grep or sort? :).
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