[libc] [llvm] [LLVM] Make the GPU loader utilities an LLVM tool (PR #132096)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-ppc64le-rhel` running on `ppc64le-clang-rhel-test` while building `libc,llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/145/builds/5919

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (build-unified-tree) failure: build (failure)
...
49.904 [1187/28/5235] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64A53Fix835769.cpp.o
49.909 [1187/27/5236] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64ISelLowering.cpp.o
49.912 [1187/26/5237] Linking CXX shared library lib/libLLVMAArch64Desc.so.21.0git
49.914 [1186/26/5238] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64AsmPrinter.cpp.o
49.918 [1186/25/5239] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64ISelDAGToDAG.cpp.o
49.919 [1186/24/5240] Building CXX object lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/GISel/AArch64InstructionSelector.cpp.o
49.919 [1186/23/5241] Creating library symlink lib/libLLVMAArch64Desc.so
49.954 [1185/23/5242] Linking CXX shared library lib/libLLVMAArch64Disassembler.so.21.0git
49.961 [1184/23/5243] Creating library symlink lib/libLLVMAArch64Disassembler.so
50.633 [1184/22/5244] Building CXX object tools/llvm-gpu-loader/CMakeFiles/llvm-gpu-loader.dir/llvm-gpu-loader.cpp.o
FAILED: tools/llvm-gpu-loader/CMakeFiles/llvm-gpu-loader.dir/llvm-gpu-loader.cpp.o 
ccache /home/buildbots/llvm-external-buildbots/clang.19.1.7/bin/clang++ --gcc-toolchain=/gcc-toolchain/usr -DGTEST_HAS_RTTI=0 -DLIBC_NAMESPACE=__llvm_libc_common_utils -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/build/tools/llvm-gpu-loader -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/tools/llvm-gpu-loader -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/build/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/include -I/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/llvm-gpu-loader/CMakeFiles/llvm-gpu-loader.dir/llvm-gpu-loader.cpp.o -MF tools/llvm-gpu-loader/CMakeFiles/llvm-gpu-loader.dir/llvm-gpu-loader.cpp.o.d -o tools/llvm-gpu-loader/CMakeFiles/llvm-gpu-loader.dir/llvm-gpu-loader.cpp.o -c /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/tools/llvm-gpu-loader/llvm-gpu-loader.cpp
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/tools/llvm-gpu-loader/llvm-gpu-loader.cpp:15:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/tools/llvm-gpu-loader/llvm-gpu-loader.h:16:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/shared/rpc_server.h:12:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/__support/RPC/rpc_server.h:38:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/stdio/printf_core/converter.h:13:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/stdio/printf_core/core_structs.h:15:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/__support/CPP/type_traits.h:29:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/__support/CPP/type_traits/is_complex.h:31:34: error: '_Complex' is a C99 extension [-Werror,-Wc99-extensions]
   31 |       __is_unqualified_any_of<T, _Complex float, _Complex double,
      |                                  ^
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/__support/CPP/type_traits/is_complex.h:31:50: error: '_Complex' is a C99 extension [-Werror,-Wc99-extensions]
   31 |       __is_unqualified_any_of<T, _Complex float, _Complex double,
      |                                                  ^
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/__support/CPP/type_traits/is_complex.h:32:31: error: '_Complex' is a C99 extension [-Werror,-Wc99-extensions]
   32 |                               _Complex long double
      |                               ^
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/tools/llvm-gpu-loader/llvm-gpu-loader.cpp:15:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/tools/llvm-gpu-loader/llvm-gpu-loader.h:16:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/shared/rpc_server.h:12:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/__support/RPC/rpc_server.h:38:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/stdio/printf_core/converter.h:13:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/stdio/printf_core/core_structs.h:16:
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/__support/FPUtil/FPBits.h:806:1: error: non-void function does not return a value [-Werror,-Wreturn-type]
  806 | }
      | ^
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/__support/FPUtil/FPBits.h:817:50: note: in instantiation of function template specialization '__llvm_libc_common_utils::fputil::get_fp_type<long double>' requested here
  817 | struct FPBits final : public internal::FPRepImpl<get_fp_type<T>(), FPBits<T>> {
      |                                                  ^
/home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/stdio/printf_core/core_structs.h:59:11: note: in instantiation of template class '__llvm_libc_common_utils::fputil::FPBits<long double>' requested here
   59 |   fputil::FPBits<long double>::StorageType conv_val_raw;
      |           ^
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/tools/llvm-gpu-loader/llvm-gpu-loader.cpp:15:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/llvm/tools/llvm-gpu-loader/llvm-gpu-loader.h:16:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/shared/rpc_server.h:12:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/__support/RPC/rpc_server.h:38:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/stdio/printf_core/converter.h:13:
In file included from /home/buildbots/llvm-external-buildbots/workers/ppc64le-clang-rhel-test/clang-ppc64le-rhel/llvm-project/cmake/Modules/../../libc/src/stdio/printf_core/core_structs.h:16:

```

</details>

https://github.com/llvm/llvm-project/pull/132096