[all-commits] [llvm/llvm-project] c9fd0d: [CMake] Pass ZLIB_LIBRARY_* to runtimes bootstrap ...

[Alexandre Ganea via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c9fd0dbbcd0b05153b2a2e20658f7c147fe42ccb
      https://github.com/llvm/llvm-project/commit/c9fd0dbbcd0b05153b2a2e20658f7c147fe42ccb
  Author: Alexandre Ganea <aganea at havenstudios.com>
  Date:   2026-04-14 (Tue, 14 Apr 2026)

  Changed paths:
    M llvm/cmake/modules/LLVMExternalProjectUtils.cmake
    M llvm/utils/release/build_llvm_release.bat

  Log Message:
  -----------
  [CMake] Pass ZLIB_LIBRARY_* to runtimes bootstrap (#191555)

Runtimes external project (compiler-rt / combined runtimes) reconfigures
with an initial cache that did not propagate `ZLIB_LIBRARY_RELEASE`.
CMake 4.x `FindZLIB` may leave `ZLIB_LIBRARY` unset while finding
headers, leading to:
```
   -- Could NOT find ZLIB (missing: ZLIB_LIBRARY) (found version "...")
```
and later when loading LLVM exports from the main build:
```
   The link interface of target "LLVMSupport" contains: ZLIB::ZLIB
   but the target was not found.
```
This was found by building the Windows installer with:
```
llvm\utils\release\build_llvm_release.bat --x64 --version 23.0.0 --skip-checkout --local-python
```



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