Libraries with many repeated transitive dependencies (e.g. Trilinos)
can result in very long runtime dependency call times, especially if
system calls are made more expensive by antivirus software. This
change caches the results of the calls to otool for efficiency.
40ade51cc8 Configure CMake itself with policies through CMake 3.21
b3248c083f export: Increase maximum policy version in exported files to 3.21
0f31463c37 Add deprecation warnings for policies CMP0094 and below
Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !6615
The files generatd by `install(EXPORT)` and `export()` commands
are known to work with policies as of CMake 3.21, so enable them
in sufficiently new CMake versions.
The OLD behaviors of all policies are deprecated, but only by
documentation. Add an explicit deprecation diagnostic for policies
introduced in CMake 3.15 and below to encourage projects to port
away from setting policies to OLD.
When merging a new set of uic options with a base set of options,
such as when a source file has a non-empty AUTOUIC_OPTIONS
property, the test for whether to support options starting with
two hyphens was only testing if the Qt major version was exactly
5 rather than at least 5. That had the effect of preventing such
options from being merged correctly when using Qt6, so new and
base options would both be present instead of the single merged
option from the source file properties. Update the version check
and rename function arguments to avoid misrepresenting what
they mean.
Note that uic accepts long option names with a single hyphen too.
See Qt docs for QCommandLineParser::ParseAsLongOptions
for confirmation.
Compilers based on EDG frontend sometimes throw
an internal error while using `this->` at some
circumstances. While it is up to be fixed in future
versions of front end, this bug still occurs in
some modern compilers, such as LCC for Elbrus CPUs,
and probably others (maybe ICC). It caused CMake to be
unbuildable by these compilers. This patch fixes it.
With builds that have many internal library directories or many
external libraries, rpaths can be quite large. The cost of calling
install_name_tool thousands of times can add up to minutes on a build,
especially if virus scanning software is there to help you out. With
this change, instead of deleting and then re-adding an rpath, we ignore
it. Likewise we batch all the rpath adjustment calls into a single command.
Before, installing SCALE (some libraries have 70+ build-time RPATHs that
get deleted, plus up to a dozen external RPATHs from upstream
dependencies that should remain in the binary) would take almost 9
minutes on my laptop, and after this change the installation takes only
30 second.
The changes are part of CMP0128.
When the standard level is unset:
* Flags are added if extension mode doesn't match the compiler's default.
Previously logic only worked if LANG_EXTENSIONS was ON. Fixes#22224.
* The full flag is used. Previously CMAKE_LANG_EXTENSION_COMPILE_OPTION was
used. This was only supported for IAR.
Otherwise:
* Avoid adding flags if not necessary per the detected compiler defaults.
* Fixed check for when the requested standard is older. It now matches the
nearby comments.
I reworded the fallback comment as its logic was a bit difficult to wrap my
head around.
