8570dc7f64 Help: Update compiler versions in cmake-compile-features.7.rst
874d3d2948 Help: Add release note for C++ 20 support
7f295b1bd3 Features: Activate C++ 20 support for Clang 5.0+
71cb8ce3a1 Features: Activate C++ 20 support for GNU 8.0+
8f146c4508 Features: Activate C++ 20 support for MSVC 19.12.25835+
7fe580a362 Features: Add infrastructure for C++ 20 language standard
1b328e09a3 Features: Use -std=c++17 for C++ 17 on Clang 5.0+
0bc3e5788a Features: Use -std=c++17 for C++ 17 on GNU 8.0+
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1892
This is useful if, for example, you want ccache to be used
for nvcc. With the current behavior, cmake always picks up
/usr/local/cuda/bin/nvcc, even if there is a ccache nvcc
stub in the PATH. Allowing for CUDA_NVCC_EXECUTABLE lets
us work around the problem.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
The MSVC C compiler has no notion of C language standards or flags.
Tell CMake to assume that all language standards are available.
Record available C language features depending on the version of
the compiler.
Fixes: #17858
GCC supports the __null builtin basically forever (since at least 2.95), which
behaves very much like nullptr later does. Use this instead of plain "0" as
fallback value, otherwise passing the define to functions annotated with
__attribute__((sentinel)) will result in a compiler warning.
Since commit v3.8.0-rc3~7^2 (FindwxWidgets: Add support for VS 2017 v141
toolset, 2017-03-22) more MSVC updates have been released that use a
MSVC_VERSION value higher than 1910. Revise our checks accordingly.
Issue: #16735
The change in commit v3.11.0-rc1~306^2 (FindQt4: Set PLUGINS and IMPORTS
dir even if empty, 2017-11-19) regressed existing builds on some
machines. Revert it for CMake 3.11 pending further investigation.
Fixes: #17814, #17817
Issue: #14155, #17492
This sets variables like PROJECT_HOMEPAGE_URL, which can be
used as default values for various things (packaging modules,
doxygen defaults, etc.). Some packaging modules have been
updated to do this as part of this commit.
Co-Author: Craig Scott <craig.scott@crascit.com>
Features recorded by commit v3.6.0-rc1~120^2~5 (Features: Record
standards and features for Intel C++ on UNIX, 2016-04-28) for the Intel
compiler left out initializer list support because our test case in
`Tests/CompileFeatures/cxx_generalized_initializers.cpp` caused an
internal compiler error. It turns out this is because the Intel
compiler asserts the `initializer_list` constructor signatures to verify
that they match its own `<initializer_list>` header. It was our dummy
implementation used to test the language feature without any headers
that caused the ICE. Revise it to use a constructor signature accepted
by the Intel compiler.
Fixes: #17829
In gtest_discover_tests(), the TIMEOUT keyword was making it
impossible to set the TIMEOUT test property via the PROPERTIES
keyword. This would be a frequent case, but it doesn't complain
and instead silently does something different to what would
normally be expected. The TIMEOUT keyword has been renamed
to DISCOVERY_TIMEOUT, thereby removing the clash.
This is a breaking change. 3.10.1 and 3.10.2 were the only versions
that supported the TIMEOUT keyword and uses of it were likely
not working as intended.
Fixes: #17801
The IBM XL C compiler does not define `__STDC__` when invoked as plain
`cc` instead of `xlc`, so `CMAKE_C_STANDARD_COMPUTED_DEFAULT` does not
get set and CMake fails. Teach CMake about the XL compiler's default C
standard in this case.
Fixes: #17649
