407937036f
This reverts commit 272d1b44efdedb68c194970a610f0ca1b7b769c5,
and the follow-up fix in d209d1340b99d4fbd325dffb5e13b757ab8264ea.
Even after the follow-up fix, building with an empty
CMAKE_INSTALL_PREFIX errors out with errors like this:
CMake Error at /b/s/w/ir/x/w/llvm-llvm-project/libcxx/modules/CMakeLists.txt:215 (file):
file RELATIVE_PATH must be passed a full path to the directory:
lib/x86_64-pc-windows-msvc
The "module partitions" for the std module
The files in this directory contain the exported named declarations per header. These files are used for the following purposes:
- During testing exported named declarations are tested against the named declarations in the associated header. This excludes reserved names; they are not exported.
- Generate the module std.
These use cases require including the required headers for these "partitions" at different locations. This means the user of these "partitions" are responsible for including the proper header and validating whether the header can be loaded in the current libc++ configuration. For example "include " fails when locales are not available. The "partitions" use the libc++ feature macros to export the declarations available in the current configuration. This configuration is available if the user includes the `__config' header.
We use .inc files that we include from the top-level module instead of
using real C++ module partitions. This is a lot faster than module partitions,
see this for details.