Bug#1021117: llvm-15-dev: cmake fails on missing /usr/lib/llvm-15/bin/mlir-tblgen

[Andreas Beckmann]

Control: tag -1 - unreproducible
Control: severity -1 serious

It actually works with llvm-15-dev/sid (and I inadvertently switched to
building spirv-llvm-translator-15 in sid instead of experimental, no
longer experiencing the failure), but fails with llvm-15-dev/experimental.

A minimal CMakeLists.txt to reproduce the problem, could be used for
an autopkgtest:

cmake_minimum_required(VERSION 3.0)
project(find_llvm C CXX)
find_package(LLVM REQUIRED)
message(STATUS "Found LLVM: ${LLVM_VERSION}")

===== llvm-15-dev/experimental =====
-- The C compiler identification is GNU 12.2.0
-- The CXX compiler identification is GNU 12.2.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Performing Test HAVE_FFI_CALL
-- Performing Test HAVE_FFI_CALL - Success
-- Found FFI: /usr/lib/x86_64-linux-gnu/libffi.so
-- Performing Test Terminfo_LINKABLE
-- Performing Test Terminfo_LINKABLE - Success
-- Found Terminfo: /usr/lib/x86_64-linux-gnu/libtinfo.so
-- Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
-- Found LibXml2: /usr/lib/x86_64-linux-gnu/libxml2.so (found version "2.9.14")
CMake Error at /usr/lib/llvm-15/lib/cmake/llvm/LLVMExports.cmake:1634 (message):
   The imported target "mlir-tblgen" references the file

      "/usr/lib/llvm-15/bin/mlir-tblgen"

   but this file does not exist.  Possible reasons include:

   * The file was deleted, renamed, or moved to another location.

   * An install or uninstall procedure did not complete successfully.

   * The installation package was faulty and contained

      "/usr/lib/llvm-15/lib/cmake/llvm/LLVMExports.cmake"

   but not all the files it references.

Call Stack (most recent call first):
   /usr/lib/llvm-15/cmake/LLVMConfig.cmake:329 (include)
   CMakeLists.txt:5 (find_package)


-- Configuring incomplete, errors occurred!
===========

===== llvm-15-dev/sid =====
-- The C compiler identification is GNU 12.2.0
-- The CXX compiler identification is GNU 12.2.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Performing Test HAVE_FFI_CALL
-- Performing Test HAVE_FFI_CALL - Success
-- Found FFI: /usr/lib/x86_64-linux-gnu/libffi.so
-- Performing Test Terminfo_LINKABLE
-- Performing Test Terminfo_LINKABLE - Success
-- Found Terminfo: /usr/lib/x86_64-linux-gnu/libtinfo.so
-- Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
-- Found LibXml2: /usr/lib/x86_64-linux-gnu/libxml2.so (found version "2.9.14")
-- Found LLVM: 15.0.0
-- Configuring done
-- Generating done
-- Build files have been written to: /tmp/tmp.jErBGkRUrA
===========

Andreas

PS: In some packages I use an autopkgtest like this to test cmake bits:

Test-Command: cmake -Wno-dev -S debian/tests/cmake-find-FOO -B $AUTOPKGTEST_TMP
Features: test-name=cmake_find_package_FOO
Depends:
  libFOO-dev,
  cmake,
  g++,
Restrictions:
  superficial,