This patch does two seperate things. First it adds a file called
"__libcpp_version" which only contains the current libc++ version
(currently 4000). This file is not intended for use as a header. This file
is used by Clang in order to easily determine the installed libc++ version.
This allows Clang to enable/disable certain language features only when the
library supports them.
The second change is the addition of _LIBCPP_LIBRARY_VERSION macro, which
returns the version of the installed dylib since it may be different than
the headers.
llvm-svn: 285382
Summary:
This patch turns on `-fvisibility-inlines-hidden` when building the dylib. This is important so that libc++.dylib doesn't accidentally export inline-functions which are ODR used somewhere in the dylib.
On OS X this change has no effect on the current ABI of the dylib. Unfortunately on Linux there are already ~20 inline functions which are unintentionally exported by the dylib. Almost all of these are implicitly generated destructors. I believe removing these function definitions is safe because every "linkage unit" which uses these functions has its own definition, and therefore shouldn't be dependent on libc++.dylib to provide them.
Also could a FreeBSD maintainer comment on the ABI compatibility of this patch?
Reviewers: mclow.lists, emaste, dexonsmith, joker-eph-DISABLED, jroelofs, danalbert, mehdi_amini, compnerd, dim
Subscribers: beanz, mgorny, cfe-commits, modocache
Differential Revision: https://reviews.llvm.org/D25593
llvm-svn: 285101
Summary:
This patch implements the library side of P0035R4. The implementation is thanks to @rsmith.
In addition to the C++17 implementation, the library implementation can be explicitly turned on using `-faligned-allocation` in all dialects.
Reviewers: mclow.lists, rsmith
Subscribers: rsmith, cfe-commits
Differential Revision: https://reviews.llvm.org/D25591
llvm-svn: 284206
These functions were removed from the dylib sometime between the 3.9 release
and now. This patch manually exports them to re-gain ABI compatibility.
llvm-svn: 284193
The primary reason for this patch is to add the OS X ABI lists for 3.9 and
ToT.
However while working on that I discovered that we incorrectly
exported the libc++abi symbols. Previously we had chosen the wrong CMake
configuration path and that caused us to re-export the c++abi binary instead
of using the symbol lists.
llvm-svn: 284188
Eric Fiselier