If compiling with GCC or linking with ld.bfd, these options have little
effect, but if built with Clang and linked with LLD, they provide a
quite notable size decrease - this shrinks an entire llvm-mingw
distribution package by 22%.
If building with BUILD_SHARED_LIBS or LLVM_BUILD_LLVM_DYLIB with LLD,
this requires a version of LLD that contains a fix for auto exporting
symbols from comdats, 2b01a417d7.
Differential Revision: https://reviews.llvm.org/D101568
Match the API for the new check_linker_flag and use it directly when
available, leaving the old code as a fallback.
Differential Revision: https://reviews.llvm.org/D100901
Changing global flags can break builds of projects that include/build
llvm as a sub-project, as the effect is global. Ideally we would
disable this warning at the directory level instead, but the obvious
way (disabling warning D9025) isn't supported. At least we can limit
the effect to only MSVC.
Patch by Jim Radford.
Differential Revision: https://reviews.llvm.org/D100900
This allows one to cross-compile the header/object for a model in a
setup where the compiler is built on a system that cannot host the AOT
compiler. For example, if arm-hostable clang is desired, while the AOT
Tensorflow compiler can cross-compile to arm, it can't currently run on
arm.
The only alternative in that scenario would be to cross-compile clang
itself, but that gets complicated when trying to run tests after that.
Differential Revision: https://reviews.llvm.org/D99992
This makes it possible to build libLLVM.so without first creating a
static library for each component. In the case where only libLLVM.so is
built (i.e. ninja LLVM) this eliminates 150 linker jobs.
Reviewed By: stellaraccident
Differential Revision: https://reviews.llvm.org/D95727
Use the CMake 3.13 features of CMakeConfigPackageHelpers to generate
LLVMConfigVersion.cmake with proper architecture detection, major+minor
version matching, etc.
Differential Revision: https://reviews.llvm.org/D99451
Call `get_errc_messages` only if `LLVM_INCLUDE_TESTS` was set.
Reviewed By: zero9178, abhina.sreeskantharajan, jhenderson
Differential Revision: https://reviews.llvm.org/D98861
Similar to the existing code for disabling GCC's -Wredudant-move,
also check for the -Wpessimizing-move option and disable it if
possible.
This silences another bunch of noisy warnings when building LLVM
with GCC 9.
As noted for -Wredundant-move, the code can't be fixed to silence the
warnings while retaining support for older compilers.
Differential Revision: https://reviews.llvm.org/D98942
BUILD_SHARED_LIBS build llvm component as shared library,
which can reduce the size a lot.
Normally, the binary use ORIGIN../lib to load component libraries,
unfortunatly, ORIGIN is not supported by AIX ld.
We hardcoded the build lib and install lib path in rpath for now
to enable BUILD_SHARED_LIBS build.
Understand that this is not perfect solution,
we can update this when we find better solution.
Reviewed By: hubert.reinterpretcast
Differential Revision: https://reviews.llvm.org/D98901
This matches what GCC warns about when -pedantic is enabled.
This should avoid such redundant semicolons creeping into the codebase.
Differential Revision: https://reviews.llvm.org/D98941
The current cmake script attempts to add the path containing clangs various runtime systems by getting the resource directory and then appending the hardcoded value /lib/windows to it. This works for a normal clang-cl build but fails for a build of clang using LLVM_ENABLE_PER_TARGET_RUNTIME_DIR, such as the builds from llvm/runtimes.
This patch instead uses -print-libgcc-file-name in conjunction with --rtlib=compiler-rt, and instead adds the containing directory as library path.
For non per-target runtime directory builds, such as the release builds, there is no change. Even if the builtins library were to be deleted or moved it would output the same path as before.
For per-target runtime builds that also have the builtins library, this now finds the correct directory containing all of clang runtime libraries.
Only case still not handled by this change, is if a per-target runtime directory build is used, but the builtins library was not built.
I believe that is the best we can do for now however, without modifying clang.
Differential Revision: https://reviews.llvm.org/D98786
If for some reason the test program does not exit normally it'd currently lead to a false positive and it's stdout output being assigned to the output variable.
Instead, check the test program exited normally before assigning the process output to the out variable.
Follow up on rGaf2796c76d2ff4b73165ed47959afd35a769beee
Fixes an issue discovered post commit in https://reviews.llvm.org/D98278
Visual Studios implementation of the C++ Standard Library does not use strerror to produce a message for std::error_code unlike other standard libraries such as libstdc++ or libc++ that might be used.
This patch adds a cmake script that through running a C++ program gets the error messages for the POSIX error codes and passes them onto lit through an optional config parameter.
If the config parameter is not set, or getting the messages failed, due to say a cross compiling configuration without an emulator, it will fall back to using pythons strerror functions.
Differential Revision: https://reviews.llvm.org/D98278
The lit test suite uses python 3.6 features. Rather than a strange
python syntax error upon running the lit tests, we will require the
correct version in CMake.
Reviewed By: serge-sans-paille, yln
Differential Revision: https://reviews.llvm.org/D95635
This allows sending requests through CLI and more debugging
opportunities. Example:
```bash
$ grpc_cli ls localhost:50051
clang.clangd.remote.v1.SymbolIndex
grpc.reflection.v1alpha.ServerReflection
grpc.health.v1.Health
```
Turn `-Wreturn-type` into an error.
This is currently used by libcxx, libcxxabi, and libunwind, and would be a good default
for all of llvm. I'm not aware of any cases where this shouldn't be an error. This
ensures different build configs, merges, and downstream branches catch issues sooner.
Differential Revision: https://reviews.llvm.org/D98224
It moved the logic for CMake target arguments into llvm_ExternalProject_Add().
No handling was added for CMAKE_CROSSCOMPILING, which has a separate set of compiler_args.
This broke crosscompiling, as now the runtimes builds defaulted to the compiler's default.
I've also added passing of CMAKE_ASM_COMPILER, which was missing before although we were passing the triple for it.
Reviewed By: zero9178
Differential Revision: https://reviews.llvm.org/D97855
As stated in the CMake manual, we are supposed to use MODULE rules to generate
plugin libraries:
"MODULE libraries are plugins that are not linked into other targets but may be
loaded dynamically at runtime using dlopen-like functionality"
Besides, LLVM's plugin infrastructure fits with the AIX treatment of .so
shared objects more than it fits with the AIX treatment of .a library archives
(which may contain shared objects).
Differential revision: https://reviews.llvm.org/D96282
Windows is in the unique position of having two drivers, clang-cl and normal GNU clang, depending on whether a GNU or MSVC target is used. The current implementation with the USE_TOOLCHAIN argument assumes that when CMAKE_SYSTEM_NAME is set to Windows that clang-cl should be used, which is the incorrect choice when targeting a GNU environment.
This patch solves this problem by adding an optional TARGET_TRIPLE argument to llvm_ExternalProject_Add, which sets the various CMAKE_<LANG>_COMPILER_TARGET variables. Additionally, if the triple is detected as an MSVC environment, clang-cl and similar MSVC specific tools will be used instead of the GNU tools.
This drops check-llvm under -DLLVM_ENABLE_LTO=Thin from 13m to 10m20s on Windows and 20m to 15m35s on Linux.
Reviewed By: hans
Differential Revision: https://reviews.llvm.org/D96618
Also add a script for sysroot management. For now, it can only create
fake sysroots that just symlink to local folders. This is useful for
testing.
Differential Revision: https://reviews.llvm.org/D96868
Multi-configuration generators (such as Visual Studio and Xcode) allow the specification of a build flavor at build time instead of config time, so the lit configuration files need to support that - and they do for the most part. There are several places that had one of two issues (or both!):
1) Paths had %(build_mode)s set up, but then not configured, resulting in values that would not work correctly e.g. D:/llvm-build/%(build_mode)s/bin/dsymutil.exe
2) Paths did not have %(build_mode)s set up, but instead contained $(Configuration) (which is the value for Visual Studio at configuration time, for Xcode they would have had the equivalent) e.g. "D:/llvm-build/$(Configuration)/lib".
This seems to indicate that we still have a lot of fragility in the configurations, but also that a number of these paths are never used (at least on Windows) since the errors appear to have been there a while.
This patch fixes the configurations and it has been tested with Ninja and Visual Studio to generate the correct paths. We should consider removing some of these settings altogether.
Reviewed By: JDevlieghere, mehdi_amini
Differential Revision: https://reviews.llvm.org/D96427
Currently using LLVM_USE_SANITIZER with a MinGW target leads to a fatal
configuration error due to an unsupported platform. MinGW targets on
clang however implement a few sanitizers, currently ASAN and UBSAN.
This patch enables LLVM_USE_SANITIZER in a MinGW environment as well.
Differential Revision: https://reviews.llvm.org/D95750
The build server should now have the missing dependencies.
Original summary:
Currently LLDB uses epydoc to generate the Python API reference for the website.
epydoc however is unmaintained since more than a decade and no longer works with
Python 3. Also whatever setup we had once for generating the documentation on
the website server no longer seems to work, so the current website documentation
has been stale since more than a year.
This patch replaces epydoc with sphinx and its automodapi plugin that can
generate Python API references. LLVM already uses sphinx for the rest of the
documentation, so this way we are more consistent with the rest of LLVM. The
only new dependency is the automodapi plugin for sphinx.
This patch effectively does the following things:
* Remove the epydoc code.
* Make a new dummy Python API page in our website that just calls the Sphinx
command for generated the API documentation.
* Add a mock _lldb module that is only used when generating the Python API.
This way we don't have to build all of LLDB to generate the API reference.
Some notes:
* The long list of skips is necessary due to boilerplate functions that SWIG
is generating. Sadly automodapi is not really scriptable from what I can see,
so we have to blacklist this stuff manually.
* The .gitignore change because automodapi wants a subfolder of our
documentation directory to place generated documentation files there. The path
is also what is used on the website, so we can't really workaround this
(without copying the whole `docs` dir somewhere else when we build).
* We have to use environment variables to pass our build path to our sphinx
configuration. Sphinx doesn't support passing variables onto that script.
Reviewed By: JDevlieghere
Differential Revision: https://reviews.llvm.org/D94489
Currently LLDB uses epydoc to generate the Python API reference for the website.
epydoc however is unmaintained since more than a decade and no longer works with
Python 3. Also whatever setup we had once for generating the documentation on
the website server no longer seems to work, so the current website documentation
has been stale since more than a year.
This patch replaces epydoc with sphinx and its automodapi plugin that can
generate Python API references. LLVM already uses sphinx for the rest of the
documentation, so this way we are more consistent with the rest of LLVM. The
only new dependency is the automodapi plugin for sphinx.
This patch effectively does the following things:
* Remove the epydoc code.
* Make a new dummy Python API page in our website that just calls the Sphinx
command for generated the API documentation.
* Add a mock _lldb module that is only used when generating the Python API.
This way we don't have to build all of LLDB to generate the API reference.
Some notes:
* The long list of skips is necessary due to boilerplate functions that SWIG
is generating. Sadly automodapi is not really scriptable from what I can see,
so we have to blacklist this stuff manually.
* The .gitignore change because automodapi wants a subfolder of our
documentation directory to place generated documentation files there. The path
is also what is used on the website, so we can't really workaround this
(without copying the whole `docs` dir somewhere else when we build).
* We have to use environment variables to pass our build path to our sphinx
configuration. Sphinx doesn't support passing variables onto that script.
Reviewed By: JDevlieghere
Differential Revision: https://reviews.llvm.org/D94489
d9ce31ae7d (D94322) removed the check because I thought it was dead
due to checking the existance of a variable (which always existed).
This causes LLDB tests to fail as they set NO_INSTALL_RPATH because
they're never meant to be installed, but we still would end up using
the install rpath.
Add the check back and make it explicitly check for an empty value
to make the purpose clearer and avoid implicit test for a false/true
value.
Differential Revision: https://reviews.llvm.org/D94326
Reverted check for empty CMAKE_BUILD_RPATH fixed.
When `BUILD_WITH_INSTALL_RPATH` is enabled it prevents using a custom rpath only
for the build tree as the install rpath will be used. This makes it impossible to run a
runtimes build when compiling with Clang and wanting the installed rpath to be
empty (i.e. `-DCMAKE_BUILD_RPATH="<some path>" -DCMAKE_SKIP_INSTALL_RPATH=ON`).
Disable `BUILD_WITH_INSTALL_RPATH` when `CMAKE_BUILD_RPATH` is non-empty to
allow for such build scenarios.
Differential Revision: https://reviews.llvm.org/D94322
This reverts commit 0ebc1fb29f.
The behaviour should have been the same as before unless specifying CMAKE_BUILD_RPATH,
which was previously broken.
However, this seems to have broken builds for some people that don't specify it.
Reverting until I can investigate.
Differential Revision: https://reviews.llvm.org/D94319
When `BUILD_WITH_INSTALL_RPATH` is enabled it prevents using a custom rpath only
for the build tree as the install rpath will be used. This makes it impossible to run a
runtimes build when compiling with Clang and wanting the installed rpath to be
empty (i.e. `-DCMAKE_BUILD_RPATH="<some path>" -DCMAKE_SKIP_INSTALL_RPATH=ON`).
Disable `BUILD_WITH_INSTALL_RPATH` when `CMAKE_BUILD_RPATH` is non-empty to
allow for such build scenarios.
Reviewed By: phosek
Differential Revision: https://reviews.llvm.org/D93177
Set the return variable to "" in find_first_existing_vc_file to
say that there is a repository, but no file to depend on. This works
transparently for all other callers that handle undefinedness and
equality to an empty string the same way.
Use the knowledge to avoid depending on __FakeVCSRevision.h if there
is no git repository at all (for example when building a release) as
there is no point in regenerating an empty VCSRevision.h.
Differential Revision: https://reviews.llvm.org/D92718
In some build configurations more than 1.5 might be required.
Paramaterize so it can be changed by the user.
Reviewed By: yamauchi
Differential Revision: https://reviews.llvm.org/D93281
Addressing clang bootstrap under the dynamic linking mode running out of static
allocation of value profile nodes, reported in D81682.
Differential Revision: https://reviews.llvm.org/D92669
LLVM passes overaligned objects by value, which MSVC 19.1 didn't support on
x86_32. MSVC added this support somewhere between 19.1 and 19.14, but godbolt
doesn't have 19.11, 19.12, or 19.13 so I can't test before 19.14:
https://gcc.godbolt.org/z/75YoEz
Even if users are using the Visual Studio 2017 series of Visual C++ toolchains,
they should've already updated to 19.14 or newer at this point, or they
wouldn't be able to build LLVM. This just raises the CMake required minimum
version so the build fails earlier.
Differential Revision: https://reviews.llvm.org/D92515
We need a real target now, and it was only being created if grpc was
built from source or imported from homebrew.
Differential Revision: https://reviews.llvm.org/D92107
Martin Storsjö