Support for warnings about missing prototypes in C++ was added by Apple
GCC (Radar 6261539). Most of the code crept into r260311 so it felt
natural to make use of it.
Obtained from: Apple GCC - 5646
MFC after: 5 days
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.
No effort was made to update the ObjC support since FreeBSD doesn't
carry ObjC in the base system, but some of the code crept in and
was more difficult to remove than to adjust.
Reference:
[1]
https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/Blocks/Articles/00_Introduction.html
[2]
http://clang.llvm.org/compatibility.html#block-variable-initialization
Obtained from: Apple GCC 4.2
MFC after: 3 weeks
Apple GCC has extensions to support for both label attributes and
an "unavailable" attribute. These are critical for objc but are
also useful in regular C/C++.
Apparently at least the label attributes might have found their way to
upstream GCC but the code doesn't seem available on the GPLv2 tree so
we are taking the code directly from Apple. To make this clearer we
are preserving the annoying "APPLE LOCAL" tags and the ChangeLogs
when they are available.
Obtained from: Apple GCC 4.2 - 5531
MFC after: 3 weeks
They are very useful but at this time I prefer not to figure out
some minor conflicts with the bigger Apple's blocks support
patch that is being worked on for current.
This solves GCC/32617 and contributes to reduce differences with
Apple's gcc42.
Complete some references in the ChangeLog while here.
Obtained from: gcc 4.3 (rev. 126529, 126588; GPLv2)
MFC after: 3 weeks
gcc: Move conditions before an assert.
It is a bit cleaner to check the conditions before calling the assertion.
It also preserves the style from the rest of the code.
This is just a cosmetical change to match better what both Apple's gcc42
and Android's gcc-4.2.1 do.
as anonymous namespaces are local to the current translation.
GCC PR: c++/33094
Reviewed by: uqs
Approved by: re (kib)
Obtained from: gcc (branches/redhat/gcc-4_1-branch, rev. 129554, GPLv2)
MFC after: 1 week
non-i386, non-unix, and generatable files have been trimmed, but can easily
be added in later if needed.
gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's
handy to have both available for reference for such little cost.
The freebsd-specific changes will then be committed, and once the dust has
settled, the bmakefiles will be committed to use this code.
