When preprocessing the rc file using the clang gnu front end we need to
force the source file type to a c file for the preprocessing to take
place.
Fixes: #21472
2c71d051fa Makefiles Generators: use compiler for dependencies generation
afd0f6785d Refactoring: Abstract Makefile line continuation format
b6068ce407 Refactoring: enhance include file filtering
3401403f69 Refactoring: Introduce place-holder for dependency target.
a97c41bf8b Refactoring: Makefiles Generators: Add support for various depends scanners
Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Brad King <brad.king@kitware.com>
Merge-request: !5528
NVCC's default architecture may be newer than the one supported by the
machine's GPU.
In such cases it's useful to have an environment variable for initializing
CMAKE_CUDA_ARCHITECTURES to avoid specifying it for every invocation.
Each source compilation generates a dependencies file. These dependencies
files are consolidated in one file per target. This consolidation is done
as part of command 'cmake -E cmake_depends` launched before evaluation of
makefile dependency graph.
The consolidation uses the same approach as `CMake` dependencies management.
Fixes: #21321
These changes are in preparation of compiler generated dependencies support
for Makefiles generators
* compiler output and dependency target can be different for Makefiles generators
* resolve inconsistency naming for dependency file place-holder
Rename the `CheckPIESupported` helper functions so that they
don't clobber other internal functions. Also rename them to
document they can't be unified with `CheckCompilerFlag`.
Fixes: #21497
Fix the language checks added by commit 90dead024c (CheckCompilerFlag:
unified way to check compiler flags per language, 2020-09-25,
v3.19.0-rc1~88^2), commit 10ae907de0 (CheckSoureCompiles: Add a unified
way to check if a source compiles, 2020-09-14, v3.19.0-rc1~118^2~1), and
commit 357e2ef429 (CheckSoureRuns: Add a unified way to check if a
source runs, 2020-09-14, v3.19.0-rc1~118^2) to work when variables of
the language names are set.
Fixes: #21500
If the user specifies CMAKE_CUDA_ARCHITECTURES we use those during detection
and error out if they don't work.
For Visual Studio a dummy project file is used instead of invoking the compiler
directly. NVCC would thus use its default and we'd fail if
CMAKE_CUDA_ARCHITECTURES was anything other than NVCC's default.
Use the necessary project file variable in CMakeDetermineCompilerId.cmake to
match other generators.
Fixes#21492.
Finding the toolkit is required for Clang and is assumed to have been correctly
found by FindCUDAToolkit if the CUDA language is found.
Error out early with an useful error instead of failing later on due to the
path not being set.
version.txt is gone from CUDA 11.1 installations, but the rest is the same.
Instead of looking for version.txt look for <CUDA path>/nvvm/libdevice, which
is the main thing that Clang requires (though it also checks for the existence
of bin and include).
Fixes#21353.
Revert commit a064b18f85 (FindGTest: Allow either "Debug" or "Release"
configurations., 2020-06-29, v3.19.0-rc1~584^2). If both configurations
are found then `GTEST_LIBRARY` is populated in a way that breaks
`__gtest_determine_library_type`, and the imported target is not
created correctly.
Fixes: #21473
Issue: #17799
Revert commit 74b1c9fc8e (Explicitly specify language flag when source
LANGUAGE property is set, 2020-06-01, v3.19.0-rc1~722^2) and the lookup
tables from its two immediate ancestors. The purpose of that change was
to convert an explicit `LANGUAGE` source file property into an explicit
language specification compiler flag like `-x c`. This seems reasonable
since the property is documented as meaning "indicate what programming
language the source file is". It is also needed to help compilers deal
with non-standard source file extensions they don't recognize.
However, some projects have been setting `LANGUAGE C` on `.S` assembler
source files to mean "use the C compiler". Passing `-x c` for them
breaks the build because the `.S` sources are not written in C. These
projects should be updated to use `enable_language(ASM)`, for which
CMake often chooses the C compiler as the assembler when using
toolchains that support it (which would have to be the case for projects
using the approach).
Revert the change for now to preserve the old behavior for such projects.
We can re-introduce it with a policy in a future version of CMake.
Fixes: #21469
Issue: #14516, #20716
The `/GR` flag has been on by default since MSVC cl 14.0 from VS 2005.
Remove it from the default flags to make it easier for projects to pass
`/GR-` themselves to turn it off.
Projects may be using string processing to replace `/GR` with another
flag, so we cannot simply drop it. Add a policy to drop it in a
compatible way.
Fixes: #21428
Brad King