In Xcode 7.3 and above, the `TEST_HOST` setting causes Xcode to
implicitly place the test module inside the executable bundle regardless
of the module's own location settings. Since commit a364d2513a (Xcode:
Fixup XCTest bundle location for Xcode 7.3, 2016-03-25, v3.5.2~6^2) we
explicitly tell CMake to put the test module in the same location so
that generator expressions used by `xctest_add_test` agree with where
Xcode actually puts it. In Xcode 16 and above, our explicit location
settings for the test module conflict with Xcode's `TEST_HOST` rules,
causing errors about multiple commands producing the same path.
Fix this by dropping CMake's explicit location for the test module
unless needed to match a project-specified location for the testee.
Instead, teach `xctest_add_test` to express the xctest module location
selected by `TEST_HOST` by using generator expressions referencing the
testee bundle.
Fixes: #26301Fixes: #26514
The Xcode 'new build system' rejects empty signing identities unless
signing is explicitly marked as not allowed. Update test cases where we
turn off signing to explicitly disallow it too.
Also turn off signing in the XCTest test.
Run the `Utilities/Scripts/clang-format.bash` script to update
all our C++ code to a new style defined by `.clang-format`.
Use `clang-format` version 3.8.
* 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.
