compilation error: array subscript 5 is above array bounds with aarch64-none-linux-gnu-g++ 12.2.Rel1

[maxmarsc]

I'm trying to cross compile ArmNN with Arm Compute Library backend using the Arm GNU Toolchain 12.2.Rel1 and this compilation error occurs :

In file included from /home/mcoutant/work/armnn/include/armnn/Types.hpp:7,
                 from /home/mcoutant/work/armnn/include/armnn/Tensor.hpp:9,
                 from /home/mcoutant/work/armnn/src/armnnUtils/Permute.cpp:6:
In static member function ‘static constexpr _Tp& std::__array_traits<_Tp, _Nm>::_S_ref(const _Tp (&)[_Nm], std::size_t) [with _Tp = unsigned int; long unsigned int _Nm = 5]’,
    inlined from ‘constexpr std::array<_Tp, _Nm>::value_type& std::array<_Tp, _Nm>::operator[](size_type) [with _Tp = unsigned int; long unsigned int _Nm = 5]’ at /usr/local/aarch64-none-linux-gnu/aarch64-none-linux-gnu/include/c++/12.2.1/array:209:25,
    inlined from ‘void {anonymous}::PermuteLoop::Unroll(size_type, const unsigned char*, unsigned char*, const unsigned char*, unsigned char*, size_t)’ at /home/mcoutant/work/armnn/src/armnnUtils/Permute.cpp:83:50,
    inlined from ‘void {anonymous}::PermuteLoop::Unroll(size_type, const unsigned char*, unsigned char*, const unsigned char*, unsigned char*, size_t)’ at /home/mcoutant/work/armnn/src/armnnUtils/Permute.cpp:80:23,
    inlined from ‘void {anonymous}::PermuteLoop::Unroll(size_type, const unsigned char*, unsigned char*, const unsigned char*, unsigned char*, size_t)’ at /home/mcoutant/work/armnn/src/armnnUtils/Permute.cpp:80:23,
    inlined from ‘void {anonymous}::PermuteLoop::Unroll(size_type, const unsigned char*, unsigned char*, const unsigned char*, unsigned char*, size_t)’ at /home/mcoutant/work/armnn/src/armnnUtils/Permute.cpp:80:23,
    inlined from ‘void {anonymous}::PermuteLoop::Unroll(size_type, const unsigned char*, unsigned char*, const unsigned char*, unsigned char*, size_t)’ at /home/mcoutant/work/armnn/src/armnnUtils/Permute.cpp:80:23,
    inlined from ‘void {anonymous}::PermuteLoop::Unroll(size_type, const unsigned char*, unsigned char*, const unsigned char*, unsigned char*, size_t)’ at /home/mcoutant/work/armnn/src/armnnUtils/Permute.cpp:80:23,
    inlined from ‘void {anonymous}::PermuteLoop::Unroll(const void*, void*, size_t)’ at /home/mcoutant/work/armnn/src/armnnUtils/Permute.cpp:55:15,
    inlined from ‘void armnnUtils::Permute(const armnn::TensorShape&, const armnn::PermutationVector&, const void*, void*, size_t)’ at /home/mcoutant/work/armnn/src/armnnUtils/Permute.cpp:134:43:
/usr/local/aarch64-none-linux-gnu/aarch64-none-linux-gnu/include/c++/12.2.1/array:61:36: error: array subscript 5 is above array bounds of ‘std::__array_traits<unsigned int, 5>::_Type’ {aka ‘const unsigned int [5]’} [-Werror=array-bounds]
   61 |       { return const_cast<_Tp&>(__t[__n]); }
      |                                 ~~~^

The CMake toolchain file I use for both ArmCL and ArmNN is :

# targets
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR aarch64)
set(triple aarch64-linux-gnu)

# misc settings
set(CMAKE_TRY_COMPILE_TARGET_TYPE "STATIC_LIBRARY")
set(GNU_ROOT "/usr/local/aarch64-none-linux-gnu")
set(CMAKE_SYSROOT "${GNU_ROOT}/aarch64-none-linux-gnu/libc")

# find paths
set(CMAKE_FIND_ROOT_PATH "${GNU_ROOT}")
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM BOTH)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE BOTH)

# compiler settings
set(CMAKE_C_COMPILER "${GNU_ROOT}/bin/aarch64-none-linux-gnu-gcc" CACHE INTERNAL "")
set(CMAKE_CXX_COMPILER "${GNU_ROOT}/bin/aarch64-none-linux-gnu-g++" CACHE INTERNAL "")

set(CMAKE_C_COMPILER_TARGET ${triple})
set(CMAKE_CXX_COMPILER_TARGET ${triple})

set(CMAKE_C_COMPILER_EXTERNAL_TOOLCHAIN "${GNU_ROOT}/lib/gcc")
set(CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN "${GNU_ROOT}/lib/gcc")

# CPU tuning : the RPI 0 2W uses a Cortex a53
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mtune=cortex-a53" CACHE STRING "")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mtune=cortex-a53" CACHE STRING "")

# Qemu emulation setup
set(CMAKE_CROSSCOMPILING_EMULATOR "qemu-aarch64-static;-L;${CMAKE_SYSROOT}" CACHE FILEPATH "Path to the emulator for the target system.")

# Include settings
set(CMAKE_CXX_STANDARD_INCLUDE_DIRECTORIES
  ${GNU_ROOT}/aarch64-none-linux-gnu/include/c++/12.2.1
  ${GNU_ROOT}/aarch64-none-linux-gnu/libc/usr/include
  ${GNU_ROOT}/include
  ${GNU_ROOT}/aarch64-none-linux-gnu/include/c++/12.2.1/aarch64-none-linux-gnu
  ${GNU_ROOT}/lib/gcc/aarch64-none-linux-gnu/12.2.1/include
)

set(CMAKE_C_STANDARD_INCLUDE_DIRECTORIES
  ${GNU_ROOT}/aarch64-none-linux-gnu/libc/usr/include
)

(with aarch64-none-linux-gnu installed under /usr/local)

I first compiled locally ArmCL with the following flags :

 -D CMAKE_TOOLCHAIN_FILE="myToolchainFile.cmake"
 -D BUILD_SHARED_LIBS=OFF
 -D ARM_COMPUTE_EXCEPTIONS=OFF

Then tried to build ArmNN like this :

export ARMCOMPUTE_LIBRARIES="${ARMCOMPUTE_BUILD_DIR}/libarm_compute_core.a;${ARMCOMPUTE_BUILD_DIR}/libarm_compute_graph.a;${ARMCOMPUTE_BUILD_DIR}/libarm_compute_sve.a;${ARMCOMPUTE_BUILD_DIR}/libarm_compute_sve2.a"

cmake -B build -D CMAKE_TOOLCHAIN_FILE="myToolchainFile.cmake" -D BUILD_CLASSIC_DELEGATE=OFF -D ARMCOMPUTENEON=ON -D BUILD_UNIT_TESTS=OFF -D BUILD_TESTS=OFF -D TOSA_REFERENCE_MODEL_OUTPUT=OFF -D BUILD_SHARED_LIBS=OFF . -D ARMCOMPUTE_ROOT="${ARMCOMPUTE_ROOT}" -D ARMCOMPUTE_LIBRARIES="${ARMCOMPUTE_LIBRARIES}"

Both ArmCL and ArmNN are on version 23.05

[maxmarsc]

Update : I tried locally installing the GNU toolchain version 11.3.rel1 rather than 12.2.Rel1 and it seems to fix the compilation. I cannot tell if this is a compiler issue or an issue on your library though.

[andyt9527]

meet the same issue building armnn 22.11.01 using gcc12.3