* Try removing attempt to set the C++ standard
Fixes#1460#1462
* set the standard to 11
* spell it right
* had it right the first time
* require std 11
* plumb through the standard to cxxfeaturecheck
* use policy instead
* can't use policy just yet
* Update CXXFeatureCheck.cmake
* fix CXX_STANDARD_REQUIRED statement
Co-authored-by: Dominic Hamon <dominichamon@users.noreply.github.com>
Some linux distributions no longer provide `python` binary and require
usage of `python3` instead. This changes the scripts here and uses
cmake `find_package(Python3` when running python.
Co-authored-by: Dominic Hamon <dominichamon@users.noreply.github.com>
* Ensure we don't need benchmark installed to pass c++ feature checks
Requires removal of some dependencies on benchmark.h from internal
low-level headers, which is a good thing.
Also added better logging to the feature check cmake module.
* Stop generating the export header and just check it in
* format the new header
* support windows
* format the header again
* avoid depending on internal macro
* ensure we define the right thing for windows static builds
* support older cmake
* and for tests
* Add possibility to ask for libbenchmark version number (#1004)
Add a header which holds the current major, minor, and
patch number of the library. The header is auto generated
by CMake.
* Do not generate unused functions (#1004)
* Add support for version number in bazel (#1004)
* Fix clang format #1004
* Fix more clang format problems (#1004)
* Use git version feature of cmake to determine current lib version
* Rename version_config header to version
* Bake git version into bazel build
* Use same input config header as in cmake for version.h
* Adapt the releasing.md to include versioning in bazel
* cmake: fix handling the case where `git describe` fails
* cmake: fix version recorded in releases
If downloaded as a tarball release, there will be no info from git
to determine the release, so it ends up v0.0.0. If that's the case,
we'll now use the release specified in the project() command,
which needs to be updated for each new release.
* cmake: add `--tags` to `git describe`
That way, lightweight tags will also be taken into account, which should
never hurt, but it'll help in cases where, for some mysterious reason or
other, annotated tags don't make it into a clone.
* update releasing.md
* Support -Wsuggest-override
google/benchmark is C++11 compatible but doesn't use the `override` keyword.
Projects using google/benchmark with enabled `-Wsuggest-override` and `-Werror` will fail to compile.
* Add -Wsuggest-override cxx flag
* Revert unrelated formatting
* Revert unrelated formatting, take 2
* Revert unrelated formatting, take 3
* Disable -Wsuggest-override when compiling tests, gtest does not handle it yet
Co-authored-by: Dominic Hamon <dominichamon@users.noreply.github.com>
* Support optional, user-directed collection of performance counters
The patch allows an engineer wishing to drill into the root causes
of a regression, for example. Currently, only single threaded runs
are supported. The feature is a build-time opt in, and then a runtime
opt in.
The engineer may run the benchmark executable, passing a list of
performance counter names (using libpfm's naming scheme) at the
command line. The counter values will then be collected and reported
back as UserCounters.
This is different from #240 in that it is a benchmark user opt-in, and
the counter collection is transparent to the benchmark.
Currently, this is only supported on platforms where libpfm is
supported.
libpfm: http://perfmon2.sourceforge.net/
* 'Use' values param in Snapshot when BENCHMARK_OS_WINDOWS
This is to avoid unused parameter warning-as-error
* Added missing include for <vector> in perf_counters.cc
* Moved doc to docs
* Added license blurbs
Fixes#974. The `cxx_feature_check` now has an additional
optional argument which can be used to supply extra cmake flags
to pass to the `try_compile` command. The `CMAKE_CXX_STANDARD=14`
flag was determined to be the minimum flag necessary to correctly
compile and run the regex feature checks when compiling with Clang
under Windows (n.b. this does *not* refer to clang-cl, the frontend
to the MSVC compiler). The additional flag is not enabled for any
other compiler/platform tuple.
When building on Windows with `BUILD_SHARED_LIBS=ON`, the symbols were
not being properly exported in the DLL. Fix this by setting
`CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS`.
Fixes#888
https://github.com/google/benchmark/pull/801 is stuck with some cryptic cmake failure due to
some linking issue between googletest and threading libraries.
I suspect that is mostly happening because of the, uhm,
intentionally extremely twisted-in-the-brains approach that is being used to
actually build the library as part of the buiild,
except without actually building it as part of the build.
If we do actually build it as part of the build,
then all the transitive dependencies should magically be in order,
and maybe everything will just work.
This new version of cmake magic was written by me in
0e22f085c5/cmake/Modules/GoogleTest.cmake.in0e22f085c5/cmake/Modules/GoogleTest.cmake, based on the official googletest docs and LOTS of experimentation.
Summary:
- When google benchmark is used as a submodule in a parent projects
whose min CMake version is 3.3.2 or later, the google benchmark
`CMakeLists.txt` triggers a warning regarding CMake policy 0063:
```
CMake Warning (dev) at tests/googlebenchmark/src/CMakeLists.txt:19 (add_library):
Policy CMP0063 is not set: Honor visibility properties for all target
types. Run "cmake --help-policy CMP0063" for policy details. Use the
cmake_policy command to set the policy and suppress this warning.
Target "benchmark" of type "STATIC_LIBRARY" has the following visibility
properties set for CXX:
CXX_VISIBILITY_PRESET
VISIBILITY_INLINES_HIDDEN
For compatibility CMake is not honoring them for this target.
This warning is for project developers. Use -Wno-dev to suppress it.
```
- Set CMake Policy 0063 to NEW if the policy is available. This will not
affect parent projects who include benchmark but do not have a CMake min
version of 3.3.2 or later, i.e. when this policy is introduced.
If this policy isn't set, CMake emits a large warning when project() is
called from a cmake subdirectory.
This came up when the benchmark library was added to the LLVM build, and
it was reported in https://llvm.org/PR38874. This patch was the fix I
applied locally to fix the issue, and I wanted to send it upstream.
For several versions now, CMake by default refers to macOS’ Clang as AppleClang instead of just Clang, which would fail STREQUAL. Fixed by changing it to MATCHES.
`MSVC` is true for clang-cl, but `"${CMAKE_CXX_COMPILER_ID}" STREQUAL
"MSVC"` is false, so we would enable -Wall, which means -Weverything
with clang-cl, and we get tons of undesired warnings.
Use the simpler condition to fix things.
Patch by: Reid Kleckner @rnk
* Set -Wno-deprecated-declarations for Intel
Intel compiler silently ignores -Wno-deprecated-declarations
so warning no. 1786 must be explicitly suppressed.
* Make std::int64_t → double casts explicit
While std::int64_t → double is a perfectly conformant
implicit conversion, Intel compiler warns about it.
Make them explicit via static_cast<double>.
* Make std::int64_t → int casts explicit
Intel compiler warns about emplacing an std::int64_t
into an int container. Just make the conversion explicit
via static_cast<int>.
* Cleanup Intel -Wno-deprecated-declarations workaround logic
dominic hamon