offload: cryptic error message when -DLLVM_LIBC_GPU_BUILD=ON is not set

[sylvestre]

with

cmake -S ../llvm/ -B build-llvm \
-G Ninja \
-DCMAKE_INSTALL_PREFIX=/usr/lib/llvm-19 \
-DLLVM_VERSION_SUFFIX= \
-DCMAKE_SUPPRESS_REGENERATION=ON \
-DCMAKE_BUILD_TYPE=Release \
-DPACKAGE_VENDOR=Debian \
-DENABLE_LINKER_BUILD_ID=ON \
-DLLVM_TARGETS_TO_BUILD=Native \
-DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;lld;cross-project-tests;mlir;bolt;flang;polly;openmp;lldb" \
-DLLVM_ENABLE_RUNTIMES="compiler-rt;libcxx;libcxxabi;libc;libunwind;offload" \
-DLLVM_ENABLE_PIC=ON \
-DLLVM_ENABLE_RTTI=ON \
-DLLVM_BUILD_DOCS=OFF \
-DLLVM_INCLUDE_GO_TESTS=OFF \
-DLLVM_USE_RELATIVE_PATHS_IN_FILES=ON \
-DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=ON \
-DLLVM_ENABLE_CURL=ON \
-DLLVM_USE_RELATIVE_PATHS_IN_DEBUG_INFO=ON \
-DCLANG_PLUGIN_SUPPORT=OFF \
-DCLANG_BUILD_EXAMPLES=OFF \
-DCLANG_DEFAULT_LINKER=ld \
-DCLANG_DEFAULT_RTLIB=libgcc \
-DCOMPILER_RT_BUILD_XRAY=OFF \
-DCOMPILER_RT_INCLUDE_TESTS=OFF \
-DCOMPILER_RT_USE_LIBCXX=OFF \
-DCOMPILER_RT_USE_BUILTINS_LIBRARY=ON \
-DLIBUNWIND_INSTALL_LIBRARY=OFF \
-DOPENMP_ENABLE_LIBOMP_PROFILING=OFF \
-DOPENMP_ENABLE_LIBOMPTARGET_PROFILING=OFF \
-DLIBOMP_ENABLE_RTTI=OFF \
-DLIBOMP_OMPT_SUPPORT=OFF \
-DCLANG_FORCE_MATCHING_LIBCLANG_SOVERSION=ON \
-DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF \
 -DLLVM_USE_LINKER=gold -DLLVM_BINUTILS_INCDIR=/usr/include/ -DLIBCXXABI_USE_LLVM_UNWINDER=ON -DLIBOMP_LIBFLAGS="-lm" -DOPENMP_USE_LLVM_UNWINDER=ON  \
-DCLANG_ENABLE_BOOTSTRAP=ON

and

cmake --build build-llvm -j 13 --target stage2

The second stage fails with:

-- Performing Test HAVE_FFI_CALL - Success
-- OMPT target disabled
-- OpenMP tools dir in libomptarget:
CMake Error at /home/sylvestre/dev/debian/pkg-llvm/llvm-toolchain/branches/llvm-project/offload/plugins-nextgen/common/CMakeLists.txt:31 (if):
  if given arguments:

    "TARGET" "llvmlibc_rpc_server" "AND"

  Unknown arguments specified


-- Configuring incomplete, errors occurred!

passing -DLLVM_LIBC_GPU_BUILD=ON removes the error message

@jdoerfert @jhuber6 rings a bell ?

[llvmbot]

@llvm/issue-subscribers-openmp

Author: Sylvestre Ledru (sylvestre)

with ``` cmake -S ../llvm/ -B build-llvm \ -G Ninja \ -DCMAKE_INSTALL_PREFIX=/usr/lib/llvm-19 \ -DLLVM_VERSION_SUFFIX= \ -DCMAKE_SUPPRESS_REGENERATION=ON \ -DCMAKE_BUILD_TYPE=Release \ -DPACKAGE_VENDOR=Debian \ -DENABLE_LINKER_BUILD_ID=ON \ -DLLVM_TARGETS_TO_BUILD=Native \ -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;lld;cross-project-tests;mlir;bolt;flang;polly;openmp;lldb" \ -DLLVM_ENABLE_RUNTIMES="compiler-rt;libcxx;libcxxabi;libc;libunwind;offload" \ -DLLVM_ENABLE_PIC=ON \ -DLLVM_ENABLE_RTTI=ON \ -DLLVM_BUILD_DOCS=OFF \ -DLLVM_INCLUDE_GO_TESTS=OFF \ -DLLVM_USE_RELATIVE_PATHS_IN_FILES=ON \ -DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=ON \ -DLLVM_ENABLE_CURL=ON \ -DLLVM_USE_RELATIVE_PATHS_IN_DEBUG_INFO=ON \ -DCLANG_PLUGIN_SUPPORT=OFF \ -DCLANG_BUILD_EXAMPLES=OFF \ -DCLANG_DEFAULT_LINKER=ld \ -DCLANG_DEFAULT_RTLIB=libgcc \ -DCOMPILER_RT_BUILD_XRAY=OFF \ -DCOMPILER_RT_INCLUDE_TESTS=OFF \ -DCOMPILER_RT_USE_LIBCXX=OFF \ -DCOMPILER_RT_USE_BUILTINS_LIBRARY=ON \ -DLIBUNWIND_INSTALL_LIBRARY=OFF \ -DOPENMP_ENABLE_LIBOMP_PROFILING=OFF \ -DOPENMP_ENABLE_LIBOMPTARGET_PROFILING=OFF \ -DLIBOMP_ENABLE_RTTI=OFF \ -DLIBOMP_OMPT_SUPPORT=OFF \ -DCLANG_FORCE_MATCHING_LIBCLANG_SOVERSION=ON \ -DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF \ -DLLVM_USE_LINKER=gold -DLLVM_BINUTILS_INCDIR=/usr/include/ -DLIBCXXABI_USE_LLVM_UNWINDER=ON -DLIBOMP_LIBFLAGS="-lm" -DOPENMP_USE_LLVM_UNWINDER=ON \ -DCLANG_ENABLE_BOOTSTRAP=ON ```

and

cmake --build build-llvm -j 13 --target stage2

The second stage fails with:

-- Performing Test HAVE_FFI_CALL - Success
-- OMPT target disabled
-- OpenMP tools dir in libomptarget:
CMake Error at /home/sylvestre/dev/debian/pkg-llvm/llvm-toolchain/branches/llvm-project/offload/plugins-nextgen/common/CMakeLists.txt:31 (if):
  if given arguments:

    "TARGET" "llvmlibc_rpc_server" "AND"

  Unknown arguments specified


-- Configuring incomplete, errors occurred!

passing -DLLVM_LIBC_GPU_BUILD=ON removes the error message

@jdoerfert @jhuber6 rings a bell ?

[llvmbot]

@llvm/issue-subscribers-offload

Author: Sylvestre Ledru (sylvestre)

with ``` cmake -S ../llvm/ -B build-llvm \ -G Ninja \ -DCMAKE_INSTALL_PREFIX=/usr/lib/llvm-19 \ -DLLVM_VERSION_SUFFIX= \ -DCMAKE_SUPPRESS_REGENERATION=ON \ -DCMAKE_BUILD_TYPE=Release \ -DPACKAGE_VENDOR=Debian \ -DENABLE_LINKER_BUILD_ID=ON \ -DLLVM_TARGETS_TO_BUILD=Native \ -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;lld;cross-project-tests;mlir;bolt;flang;polly;openmp;lldb" \ -DLLVM_ENABLE_RUNTIMES="compiler-rt;libcxx;libcxxabi;libc;libunwind;offload" \ -DLLVM_ENABLE_PIC=ON \ -DLLVM_ENABLE_RTTI=ON \ -DLLVM_BUILD_DOCS=OFF \ -DLLVM_INCLUDE_GO_TESTS=OFF \ -DLLVM_USE_RELATIVE_PATHS_IN_FILES=ON \ -DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=ON \ -DLLVM_ENABLE_CURL=ON \ -DLLVM_USE_RELATIVE_PATHS_IN_DEBUG_INFO=ON \ -DCLANG_PLUGIN_SUPPORT=OFF \ -DCLANG_BUILD_EXAMPLES=OFF \ -DCLANG_DEFAULT_LINKER=ld \ -DCLANG_DEFAULT_RTLIB=libgcc \ -DCOMPILER_RT_BUILD_XRAY=OFF \ -DCOMPILER_RT_INCLUDE_TESTS=OFF \ -DCOMPILER_RT_USE_LIBCXX=OFF \ -DCOMPILER_RT_USE_BUILTINS_LIBRARY=ON \ -DLIBUNWIND_INSTALL_LIBRARY=OFF \ -DOPENMP_ENABLE_LIBOMP_PROFILING=OFF \ -DOPENMP_ENABLE_LIBOMPTARGET_PROFILING=OFF \ -DLIBOMP_ENABLE_RTTI=OFF \ -DLIBOMP_OMPT_SUPPORT=OFF \ -DCLANG_FORCE_MATCHING_LIBCLANG_SOVERSION=ON \ -DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF \ -DLLVM_USE_LINKER=gold -DLLVM_BINUTILS_INCDIR=/usr/include/ -DLIBCXXABI_USE_LLVM_UNWINDER=ON -DLIBOMP_LIBFLAGS="-lm" -DOPENMP_USE_LLVM_UNWINDER=ON \ -DCLANG_ENABLE_BOOTSTRAP=ON ```

and

cmake --build build-llvm -j 13 --target stage2

The second stage fails with:

-- Performing Test HAVE_FFI_CALL - Success
-- OMPT target disabled
-- OpenMP tools dir in libomptarget:
CMake Error at /home/sylvestre/dev/debian/pkg-llvm/llvm-toolchain/branches/llvm-project/offload/plugins-nextgen/common/CMakeLists.txt:31 (if):
  if given arguments:

    "TARGET" "llvmlibc_rpc_server" "AND"

  Unknown arguments specified


-- Configuring incomplete, errors occurred!

passing -DLLVM_LIBC_GPU_BUILD=ON removes the error message

@jdoerfert @jhuber6 rings a bell ?

[jhuber6]

Probably forgot some quotation marks somewhere.