In commit v3.8.0-rc1~304^2 (MSVC: Do not define _DEBUG explicitly when
using /MDd, 2016-11-15) we removed the `_DEBUG` preprocessor definition
from MSVC C and C++ flags because the `cl` compiler automatically
defines it in Debug builds anyway. However, the VS generators propagate
C preprocessor definitions to the RC (Windows Resource Compiler) tool.
This means that we used to explicitly define `_DEBUG` for RC debug
builds. Therefore existing project code may expect the definition to be
there even though the `rc` compiler itself does not implicitly define
`_DEBUG` in debug builds.
Add the `_DEBUG` flag to the default `CMAKE_RC_FLAGS_DEBUG` instead
to restore this definition for RC debug builds. This also makes it
available consistently in VS, Ninja, and Makefile generators.
Fixes: #16745
VS 2017 (VS 15) places its redist DLLs in `Microsoft.VC150.*`
directories but still uses version number `140` in the DLL names. The
redist directories now have version numbers in their name, and the MSVC
and MFC runtime DLLs may be in directories with different versions.
Fill out our logic to handle this.
For now assume we are given the `MSVC_REDIST_DIR` value as a cache
entry. Unfortunately we cannot yet find the VS 2017 MSVC redist
directory automatically since there is no registry entry for the VS
installation. Later we will have to use `cmVSSetupHelper` for this.
Issue: #16735
Each `MSVC${v}_*_DIR` variable is only ever used with one value for
`${v}` within a given build tree. Drop the `${v}` version component
from the variable names.
For a given `MSVC_VERSION` our macros were each called at most once.
Replace them with a single code path that is parameterized over what
was the macro argument.
Some projects may not be prepared to use the imported targets defined by
the HDF5 package configuration file. Give users a way to skip this part
of the search.
Issue: #16718
Update the module to enable finding components of Boost 1.64 (beta) from
the upcoming release. Also update the Boost library name mangling used
for VS 2017 to match a change made to Boost upstream (vc150 => vc1410).
At a VS 2017 command prompt the `PATH` contains a directory that happens
to have a `Git/cmd/git.exe` inside it. However, this executable is not
meant for general use. Revise our use of `Git/` path suffixes to be
more specific to its original purpose of searching in the typical
`c:/Program Files*/Git/` installation directories. Avoid using the
suffixes on `PATH` entries.
Fixes: #16706
Before Vulkan 1.0.42, the SDK would add the Bin directory to `PATH`,
which was confusing the 32-bit search on Windows. Avoid such confusion
by ignoring the `PATH` when looking for the 32-bit version.
Vulkan 1.0.42 fixed the whole problem by moving the libraries into Lib,
Lib32, so this is strictly a compatibility fix for old SDKs.
