This commit fixes libc++abi build when LLVM unwinder (libunwind_llvm) is
not enabled.
This commit fixes the problem by removing "LLVM_NATIVE_ARCH MATCHES ARM"
from CMakeLists.txt so that LIBCXXABI_USE_LLVM_UNWINDER will only be
defined when LLVM unwinder is enabled.
We need LIBCXXABI_USE_LLVM_UNWINDER becase there is a subtle difference
between the unwinder from libgcc and the one from libunwind_llvm. For
the unwinder from libgcc, we have to initialize register r12 with the
address of _Unwind_Control_Block; otherwise,
_Unwind_GetLanguageSpecificData() and _Unwind_GetRegionStart() won't
work properly. Consequently, there is an extra _Unwind_SetGR() when
LLVM unwinder is disabled. Check cxa_personality.cpp for details.
llvm-svn: 286759
The runtimes subdir is the new location for runtimes, we should
include it when looking for libcxx and libunwind headers.
Differential Revision: https://reviews.llvm.org/D26362
llvm-svn: 286614
The runtimes subdir is the new location for runtimes, we should
include it when looking for libcxx and libunwind headers.
Differential Revision: https://reviews.llvm.org/D26362
llvm-svn: 286332
Summary:
Some changes are made to cmake, especially the addition of a new
LLVM_ENABLE_PROJECTS option that makes the build system aware of
the monorepo directory structure.
Also a new script is added in llvm/utils/git-svn/. When present in
the $PATH, it enables a `git llvm` command. It is providing at this
point only the ability to push from the git monorepo: `git llvm push`.
It is intended to evolves with more features, for instance I plan on
features like `git llvm show r284955` to help working with sequential
revision numbers.
The push feature is taken from Justin Lebar's script available here:
https://github.com/jlebar/llvm-repo-tools/
Reviewers: jlebar
Subscribers: mgorny, modocache, llvm-commits
Differential Revision: https://reviews.llvm.org/D26334
llvm-svn: 286123
This patch refactors all pthread uses of libc++abi into a separate API. This
is the first step towards supporting an externlly-threaded libc++abi library.
I've followed the conventions already used in the libc++ library for the same
purpose.
Patch from: Saleem Abdulrasool and Asiri Rathnayake
Reviewed by: compnerd, EricWF
Differential revisions:
https://reviews.llvm.org/D18482 (original)
https://reviews.llvm.org/D24864 (final)
llvm-svn: 284128
The cmake files install directory has been changed to
${prefix}/lib/cmake/llvm since r259821. Searching cmake modules in
${prefix}/share/llvm/cmake will result in fatal errors.
This commit fixes the out-of-tree build by changing the CMake module
search path to: "$(llvm-config --obj-root)/lib/cmake/llvm"
llvm-svn: 283100
`__declspec(dllexport)` and `__declspec(dllimport)` should only be used
when building libc++abi as a DLL, but that's the more common use case,
so default to adding the annotations and add an option to opt out.
Similar to r282449, which made the corresponding change for libc++.
Differential Revision: https://reviews.llvm.org/D24945
llvm-svn: 282470
This patch applies changes similar to those in r279515 to libc++abi.
Summary of changes in this patch:
* Renamed variable LLVM_CONFIG -> LLVM_CONFIG_PATH
* Renamed variable LIBCXXABI_BUILT_STANDALONE -> LIBCXXABI_STANDALONE_BUILD
* Add an include of AddLLVM in the tests subdirectory for add_lit_testsuite.
llvm-svn: 279936
Add an option to opt into compiler-rt instead of libgcc. This option defaults
to OFF to avoid a behaviour change. It is not possible to mix and match
different runtime libraries. Disabling this requires that libc++ is built
accordingly. This knob is particularly useful for targets that are GCC by
default (i.e. Linux).
llvm-svn: 275505
This patch breaks the ABI on linux when libc++abi.a is statically linked into
libc++.so. Certain libc++ symbols get exported from libc++abi.a as hidden
and therefore they also get hidden in libc++.so.
The symbols is question are:
* _ZNKSt3__121__basic_string_commonILb1EE20__throw_out_of_rangeEv
* _ZNKSt3__121__basic_string_commonILb1EE20__throw_length_errorEv
* _ZNKSt3__120__vector_base_commonILb1EE20__throw_length_errorEv
I imagine we just need to fix the visibility for these symbols in the libc++
headers but I'm reverting the patch until it's sorted.
llvm-svn: 271500
Summary:
This patch changes the libc++abi CMake so that it adds certain target flags like '-m32' or '--gcc-toolchain' before including `config-ix.cmake`.
Since these flags can affect things like `check_library_exists([...])` they needed to be added before the tests are performed.
Additionally this patch adds `LIBCXXABI_BUILD_32_BITS` which defaults to `LLVM_BUILD_32_BITS`.
This patch fixes:
https://llvm.org/bugs/show_bug.cgi?id=27950https://llvm.org/bugs/show_bug.cgi?id=27959
Reviewers: danalbert, jroelofs, bcraig, compnerd, EricWF
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D20886
llvm-svn: 271470
Currently there is only support for a -fno-exceptions libc++ build. This is
problematic for functions such as std::terminate() which are defined in
libc++abi and using any of those functions throws away most of the benefits
of using -fno-exceptions (code-size). This patch introduces a -fno-exceptions
libc++abi build to address this issue.
This new variant of libc++abi cannot be linked against any with-exceptions
code as some symbols necessary for handling exceptions are missing in this
library.
Differential revision: http://reviews.llvm.org/D20677
Reviewers: EricWF, mclow.lists, bcraig
llvm-svn: 271267
Enable building libc++abi with hidden visibility by default. The ABI mandated
interfaces (and a few extra) are already set up to be externally visible. This
allows us to ensure that any implementation details are not leaked.
llvm-svn: 270816
When building libcxxabi in tree (i.e. in llvm/projects/libcxxabi,
along with llvm/projects/libcxx), libcxx's config_site.in doesn't
get created in a timely manner. This means that any configuration
that is normally set in libcxx's config_site.in needs to be
duplicated in libcxxabi to successfully build libcxxabi. This patch
does exactly that for the _LIBCPP_HAS_THREAD_API_PTHREAD
preprocessor define.
http://reviews.llvm.org/D20574
llvm-svn: 270732
Prior to this patch, setting LIBCXXABI_LIBDIR_SUFFIX would confuse the
check-libcxxabi target. libc++abi.* would get output to lib instead of
lib${LIBCXXABI_LIBDIR_SUFFIX}, but the tests would look in the suffixed
directory.
Now, we match what libcxx does, and set the CMAKE_*_OUTPUT_DIRECTORY to the
LIBRARY_DIR.
http://reviews.llvm.org/D17410
llvm-svn: 266611
So cmake will throw error "include_directories given empty-string as include directory".
Use other variable name for the include path and do not find the default libunwind.h in the system path.
http://reviews.llvm.org/D9641
Patch by Jingyi Wei!
llvm-svn: 236936
This papers over a layering violation currently between libc++abi and libunwind.
It reaches into the sources to get the declaration of an ABI defined function.
This should allow the ARM buildbot to continue building libc++abi again.
llvm-svn: 235965
Attempting to default the option to ON for ARM doesnt seem to work. Force the
check lower and perform the check at the two sites that matter: the CPPFLAGS
definition and the header search path setup.
llvm-svn: 235964
libc++abi uses EHABI extensions, which are only part of the LLVM unwinder. When
targeting ARM by default, enable the use of the LLVM unwinder. Hopefully this
will fix the ARM native bot
llvm-svn: 235904
This removes the libunwind build infrastructure as libunwind is gaining its own
CMakeLists.txt. The removal must occur first due to the multiple definitions of
the same target.
llvm-svn: 235794
Summary:
This patch builds both static and shared versions of libc++abi by default. It adds/repurposes the following cmake options:
* `LIBCXXABI_ENABLE_SHARED`: Enable/disable building the shared library. (Previously using `OFF` would build the static library instead)
* `LIBCXXABI_ENABLE_STATIC`: Enable/disable building the static library.
This patch also re-purposes the CMake target `cxxabi` to be a meta-target for `cxxabi_shared` and `cxxabi_static`. This could potentially break other builds that depend on `cxxabi` being a library target. We will need to apply a patch to libc++'s CMake before committing this change.
Running the tests is still only supported when the shared version is built. Support for running the tests against the static library will come in another patch.
Reviewers: jroelofs, mclow.lists, danalbert, compnerd
Reviewed By: danalbert, compnerd
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D8013
llvm-svn: 231075
The problem that caused the need for http://reviews.llvm.org/D7419 was
caused by testing the value of something that was undefined. This
should prevent that in the future.
llvm-svn: 228257
Summary:
The main section of this patch teaches CMake a new option `LIBCXXABI_LIBCXX_PATH` that specifies the path to the libcxx source root. This information is passed to lit so that it can better find libc++'s python module. `LIBCXXABI_LIBCXX_PATH` is also used to help find the libc++ headers.
The rest of this patch is misc cleanup, mostly to make pep8 and pylint happy.
I've also copied libc++'s .gitignore into libc++abi.
Reviewers: jroelofs, danalbert
Reviewed By: danalbert
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D7130
llvm-svn: 226855
Without -funwind-tables, the compiler won't generate the unwinding
table for these C functions. However, the functions in libunwind,
such as `_Unwind_Backtrace()`, WILL unwind stack to get the backtrace.
llvm-svn: 226823
This CL adds a new compilation flags LIBCXXABI_USE_LLVM_UNWINDER
to specify whether the LLVM unwinder is enabled. Besides, all
unwinder-specific code are guarded with this definition.
Now, libc++abi will be able to use the unwinding routine from libgcc
when LIBCXXABI_USE_LLVM_UNWINDER is disabled.
llvm-svn: 226819
libdir suffixes like 'lib64' or 'lib32'.
This support is currently very rhudimentary. We define a variable
LIBCXXABI_LIBDIR_SUFFIX. In a standalone build of libc++abi this can be
directly set as a cached variable to control the multilib suffix used.
When building libc++abi within a larger LLVM build, it is hard wired to
whatever LLVM libdir suffix has been selected. If this doesn't work for
someone, just let me know. I'm happy to change it.
Unfortunately, libc++abi's lit setup made this somewhat problematic to
change. It was setting variables up in a way that caused the resulting
build to not work with lit at all. To fix that, I've moved some
variables around in the CMake build to more closely match where and how
they are defined in the libc++ CMake build. This includes specifically
defining a library root variable in the CMake build where the libdir
suffix can be applied, and then using that rather than re-computing it
from the object directory in the lit config.
This is essentially new functionality for libc++abi so I don't expect it
to have any impact for folks until they start setting these variables.
However, I know libc++abi is built in a diverse set of environments so
just let me know if this causes you any problems.
llvm-svn: 224927
Summary:
This patch adds CMake support for building and testing libc++abi without threads.
1. Add `LIBCXXABI_ENABLE_THREADS` option to CMake.
2. Propagate `LIBCXXABI_ENABLE_THREADS` to lit via lit.site.cfg.in
3. Configure tests for `LIBCXXABI_ENABLE_THREADS=OFF
Currently the test suite does not work when libc++abi is built without threads because that information does not propagate to the test suite.
Reviewers: danalbert, mclow.lists, jroelofs
Reviewed By: jroelofs
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D6393
llvm-svn: 222702
Eric Fiselier