CMP0115 requires that source files listed in CMake must include their
file extension, but there are cases when projects have different source
files with the same name, but one with an extension and one without.
In the current state, CMake will ignore the file without the extension
an always map it to the file with an extension.
```cmake
add_library(foo bar.c bar)
```
In the above example, the target `foo` will only recognize and depend on
`bar.c` and miss the file `bar` unless `bar` comes before `bar.c` in the
source list.
This issue also affects how custom commands emit files.
This change adds a new policy to recognize files with and without a file
extension as different files, both when building targets, and when they
are being created.
Fixes: #26058
When doing successive matches, track the input start and current search
start positions separately to prevent the `^` anchor from matching in
the middle of the string. Add policy CMP0186 to provide compatibility.
Issue: #26629Fixes: #16899
Replace our hard-coded default for `/RTC1` with a first-class
abstraction to select runtime checks from an enumeration of logical
names. Add a `MSVC_RUNTIME_CHECKS` target property and corresponding
`CMAKE_MSVC_RUNTIME_CHECKS` variable.
Removing the old default flag requires a policy because existing
projects may rely on string processing to edit them and choose
runtime checks under the old behavior. Add policy CMP0184 to
provide compatibility.
Fixes: #26614
Run the `clang-format.bash` script to update all our C and C++ code to a
new style defined by `.clang-format`, now with "east const" enforcement.
Use `clang-format` version 18.
* If you reached this commit for a line in `git blame`, re-run the blame
operation starting at the parent of this commit to see older history
for the content.
* See the parent commit for instructions to rebase a change across this
style transition commit.
Issue: #26123
