Since ff6234509e (Help: Clarify behavior of INHERITED properties, 2018-03-21),
the docs for some get_..._property() commands incorrectly describe
the behavior for inherited properties. When a property is not set, even
in a parent scope, the returned result from the get_..._property()
command is the same whether the property is inherited or not.
The docs incorrectly stated that an empty string would be returned
for inherited properties in such cases.
Property-related commands used a mix of <VAR>, <var>, or
<variable> to specify the variable to store the result in. The <VAR>
form is particularly confusing, since being uppercase it looks more
like a keyword. Use <variable> consistently across all the commands
so that the behavior is clear.
459d1cc095 Tests: Verify that linker tool is detected and identified where expected
6aec4739c1 LinkerId: Record detection steps to configure log
ba5f8dbba3 LinkerId: Use empty string for unknown linker id
6cbd0658c5 LinkerId: Match Apple linker on all Apple platforms
9324668517 LinkerId: Fix detection of GNU linker id without parenthesis in version output
37bc148870 LinkerId: Fix detection of linker tool without path
6e527c2d38 LinkerId: Fix detection of linker tool for Clang on OpenBSD
455aed3061 LinkerId: Fix detection of linker tool for MSVC
...
Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !9086
Since commit c26c6ac488 (Link Step: compute effective linker used by the
compiler, 2023-05-27) we used `UNKNOWN` if the linker id is not known.
This convention is not used elsewhere, and logic using the linker id
is easier when `if(CMAKE_C_COMPILER_LINKER_ID)` is false on unknown id.
`cmake_determine_linker_id` is only used for macOS because Apple device
platforms set `_CMAKE_FEATURE_DETECTION_TARGET_TYPE` to `STATIC_LIBRARY`,
but we might as well prepare for them anyway.
Previously we matched an entire build system output line and then
extracted the relevant portion in a separate brittle step. Match
it directly. Use the `CMAKE_LINKER` value directly if available.
We do not use `-Wl,-v` on SunOS because not all GNU deployments use the
`collect2` helper, and those that do do not always print the underlying
`ld` command line. Parse the `--with-ld=` option as a fallback.
When IBM XL is used as the host compiler for nvcc, it generates a
comma-separated link line. Parse the `exec:` line syntax separately, as
was done in commit b5f20da94d (CMakeParseImplicitLinkInfo supports comma
separated link lines, 2019-08-23, v3.16.0-rc1~181^2).
Since commit c26c6ac488 (Link Step: compute effective linker used by the
compiler, 2023-05-27) we use `CMAKE_${lang}_VERBOSE_LINK_FLAG` when
detecting implicit link information. Generate sample test data with it.
Xcode has been reported to not work at all with this when
ExternalProject projects share download files.
Revert commit 872daff159 (ExternalProject: declare byproducts for the
download step, 2023-09-21, v3.28.0-rc1~27^2) pending further
investigation.
Fixes: #25525
Brad King