Bug#1113237: llvm-toolchain-19: FTBFS with CMake 4

Sun Aug 31 23:59:41 BST 2025

Source: llvm-toolchain-19
Version: 1:19.1.7-3
Severity: serious
User: cmake at packages.debian.org
Usertags: cmake-4
Tags: ftbfs, forky, sid

Dear maintainer,

During a test rebuild for CMake 4, llvm-toolchain-19 failed to rebuild.

Log Summary:
-------------------------------------------------------------------------------
[...]
[2834/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink tahiti-amdgcn-mesa-mesa3d.bc gfx1152-amdgcn-mesa-mesa3d.bc
[2835/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink tahiti-amdgcn-mesa-mesa3d.bc gfx1200-amdgcn-mesa-mesa3d.bc
[2836/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink tahiti-amdgcn-mesa-mesa3d.bc gfx1101-amdgcn-mesa-mesa3d.bc
[2837/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink tahiti-amdgcn-mesa-mesa3d.bc gfx1151-amdgcn-mesa-mesa3d.bc
[2838/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink tahiti-amdgcn-mesa-mesa3d.bc gfx1201-amdgcn-mesa-mesa3d.bc
[2839/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build/prepare_builtins -o nvptx--.bc builtins.opt.nvptx--.bc
[2840/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink cedar-r600--.bc palm-r600--.bc
[2841/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build/prepare_builtins -o nvptx64--.bc builtins.opt.nvptx64--.bc
[2842/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink cedar-r600--.bc sumo-r600--.bc
[2843/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink cedar-r600--.bc redwood-r600--.bc
[2844/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink cedar-r600--.bc sumo2-r600--.bc
[2845/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink cedar-r600--.bc juniper-r600--.bc
[2846/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink cypress-r600--.bc hemlock-r600--.bc
[2847/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build/prepare_builtins -o nvptx64--nvidiacl.bc builtins.opt.nvptx64--nvidiacl.bc
[2848/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink barts-r600--.bc turks-r600--.bc
[2849/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink barts-r600--.bc caicos-r600--.bc
[2850/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/cmake -E create_symlink cayman-r600--.bc aruba-r600--.bc
[2851/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build/prepare_builtins -o nvptx--nvidiacl.bc builtins.opt.nvptx--nvidiacl.bc
[2852/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/llvm-spirv-19 --spirv-max-version=1.1 -o spirv64-mesa3d-.spv builtins.link.spirv64-mesa3d-.bc
[2853/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /usr/bin/llvm-spirv-19 --spirv-max-version=1.1 -o spirv-mesa3d-.spv builtins.link.spirv-mesa3d-.bc
[2854/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/tools/clang/stage2-bins/bin/opt -O3 -o builtins.opt.amdgcn--amdhsa.bc builtins.link.amdgcn--amdhsa.bc
[2855/2855] cd /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build && /build/reproducible-path/llvm-toolchain-19-19.1.7/libclc/build/prepare_builtins -o amdgcn--amdhsa.bc builtins.opt.amdgcn--amdhsa.bc
	Command being timed: "ninja -j 5 -v"
	User time (seconds): 1433.95
	System time (seconds): 164.61
	Percent of CPU this job got: 489%
	Elapsed (wall clock) time (h:mm:ss or m:ss): 5:26.24
	Average shared text size (kbytes): 0
	Average unshared data size (kbytes): 0
	Average stack size (kbytes): 0
	Average total size (kbytes): 0
	Maximum resident set size (kbytes): 551460
	Average resident set size (kbytes): 0
	Major (requiring I/O) page faults: 552
	Minor (reclaiming a frame) page faults: 24253758
	Voluntary context switches: 26680
	Involuntary context switches: 8779
	Swaps: 0
	File system inputs: 14584
	File system outputs: 916960
	Socket messages sent: 0
	Socket messages received: 0
	Signals delivered: 0
	Page size (bytes): 4096
	Exit status: 0
touch stamps/debian-libclc-build
Building compiler-rt for wasm32
Using cmake: cmake
mkdir -p "build-wasm/compiler-rt-wasm32"
cmake -B "build-wasm/compiler-rt-wasm32" -S compiler-rt/lib/builtins/ \
	-G Ninja \
	 \
	-DCMAKE_SYSTEM_NAME=Generic \
	-DCMAKE_C_COMPILER_TARGET=wasm32-unknown-unknown \
	-DCMAKE_CXX_COMPILER_TARGET=wasm32-unknown-unknown \
	-DCMAKE_ASM_COMPILER_TARGET=wasm32-unknown-unknown \
	-DCMAKE_C_COMPILER=/build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/tools/clang/stage2-bins/bin/clang \
	-DCMAKE_CXX_COMPILER=/build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/tools/clang/stage2-bins/bin/clang++ \
	-DCMAKE_C_FLAGS="-O2 -DNDEBUG -g1 -Werror=implicit-function-declaration -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wno-unused-command-line-argument -Wdate-time -D_FORTIFY_SOURCE=2" \
	-DCMAKE_CXX_FLAGS="-O2 -DNDEBUG -g1 -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wno-unused-command-line-argument -Wdate-time -D_FORTIFY_SOURCE=2" \
	-DCMAKE_SHARED_LINKER_FLAGS="-Wl,-z,relro -Wl,--build-id -L/build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/tools/clang/stage2-bins/lib" \
	-DCMAKE_MODULE_LINKER_FLAGS="-Wl,-z,relro -Wl,--build-id -L/build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/tools/clang/stage2-bins/lib" \
	-DCMAKE_EXE_LINKER_FLAGS="-Wl,-z,relro -Wl,--build-id -L/build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/tools/clang/stage2-bins/lib" \
	-DCMAKE_INSTALL_PREFIX=/usr/lib/llvm-19/lib/clang/19 \
	-DCMAKE_INSTALL_DATADIR=lib \
	-DCMAKE_INSTALL_INCLUDEDIR=include \
	-DLLVM_CMAKE_DIR=/build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/tools/clang/stage2-bins/bin/../ \
	-DCOMPILER_RT_STANDALONE_BUILD=ON \
	-DCOMPILER_RT_BAREMETAL_BUILD=ON \
	-DCOMPILER_RT_INCLUDE_TESTS=OFF \
	-DCOMPILER_RT_USE_LIBCXX=OFF \
	-DCOMPILER_RT_USE_BUILTINS_LIBRARY=ON \
	-DCOMPILER_RT_DEFAULT_TARGET_TRIPLE=wasm32-unknown-unknown \
	-DCOMPILER_RT_OS_DIR=wasi
-- The C compiler identification is Clang 19.1.7
-- The ASM compiler identification is Clang with GNU-like command-line
-- Found assembler: /build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/tools/clang/stage2-bins/bin/clang
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/tools/clang/stage2-bins/bin/clang - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Looking for unwind.h
-- Looking for unwind.h - found
-- Looking for rpc/xdr.h
-- Looking for rpc/xdr.h - not found
-- Could NOT find FFI (missing: FFI_LIBRARIES HAVE_FFI_CALL) 
-- Looking for histedit.h
-- Looking for histedit.h - not found
-- Could NOT find LibEdit (missing: LibEdit_INCLUDE_DIRS LibEdit_LIBRARIES) 
-- Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR) 
-- Could NOT find zstd (missing: zstd_LIBRARY zstd_INCLUDE_DIR) 
-- Found LibXml2: /usr/lib/aarch64-linux-gnu/libxml2.so (found version "2.14.5")
-- Found CURL: /usr/lib/aarch64-linux-gnu/libcurl.so (found version "8.16.0-rc2")
CMake Error at /build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/tools/clang/stage2-bins/lib/cmake/llvm/LLVMExports.cmake:1473 (add_library):
  ADD_LIBRARY called with SHARED option but the target platform does not
  support dynamic linking.
Call Stack (most recent call first):
  /build/reproducible-path/llvm-toolchain-19-19.1.7/build-llvm/tools/clang/stage2-bins/lib/cmake/llvm/LLVMConfig.cmake:371 (include)
  /build/reproducible-path/llvm-toolchain-19-19.1.7/compiler-rt/cmake/Modules/CompilerRTUtils.cmake:312 (find_package)
  CMakeLists.txt:29 (load_llvm_config)

-- Configuring incomplete, errors occurred!
make[1]: *** [debian/rules:1035: build-wasm/compiler-rt-wasm32] Error 1
make[1]: Leaving directory '/build/reproducible-path/llvm-toolchain-19-19.1.7'
make: *** [debian/rules:665: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
--------------------------------------------------------------------------------
Build finished at 2025-08-30T11:55:46Z

-------------------------------------------------------------------------------

The above is just how the build ends and not necessarily the most relevant part.
If required, the full build log is available here (for the next 30 days):
https://debusine.debian.net/artifact/2406252/

The most likely cause of build failures is the removed backwards compatibility for
CMake versions earlier than 3.5. You can find additional information in my
debian-devel announcement:

https://lists.debian.org/debian-devel/2025/04/msg00310.html

About the archive rebuild: The build was made on debusine.debian.net,
using sbuild.

You can find the build task here:
https://debusine.debian.net/work-request/153971/

If this is really a bug in one of the build-depends, please use
reassign and affects, so that this is still visible in the BTS web
page for this package.

Thanks,
Timo