Potential CMake ordering issue with -Dasan=ON

[pcanal]

On my node configuring an empty build directory with:

cmake -Dminimal=ON -Dasan=ON  -Dbuiltin_lzma="ON" -Dbuiltin_zlib:BOOL="ON" -Droottest="ON" -Dtesting="ON" -Dwebgui="OFF" ~/root_working/code/quick-devel

fails with:

-- Building LLVM in 'Release' mode.
CMake Error at interpreter/llvm-project/llvm/lib/Support/CMakeLists.txt:303 (get_property):
  The LOCATION property may not be read from target "ZLIB".  Use the target
  name directly with add_custom_command, or use the generator expression
  $<TARGET_FILE>, as appropriate.



CMake Error at interpreter/llvm-project/llvm/lib/Support/CMakeLists.txt:306 (get_property):
  The LOCATION property may not be read from target "ZLIB".  Use the target
  name directly with add_custom_command, or use the generator expression
  $<TARGET_FILE>, as appropriate.



CMake Error at interpreter/llvm-project/llvm/lib/Support/CMakeLists.txt:308 (get_library_name):
  get_library_name Function invoked with incorrect arguments for function
  named: get_library_name

However doing the configuration in 2 stages:

cmake -Dminimal=ON  -Dbuiltin_lzma="ON" -Dbuiltin_zlib:BOOL="ON" -Droottest="ON" -Dtesting="ON" -Dwebgui="OFF" ~/root_working/code/quick-devel/
cmake -Dasan=ON .

works fine (i.e. configuration succeeds).

[ferdymercury]

Slightly related. As seen in the asan-build logs of https://github.com/root-project/root/actions/runs/17485660017/job/49664026421?pr=19636

We have many roottest with errors of the type:

ASan runtime does not come first in initial library list; you should either link runtime to your application or manually preload it with LD_PRELOAD.