Potential Causes of the Problem

Oct 13, 2025 by wbrum.org 60 views

Introduction

In this article, we will explore the issue of Ninja building failing for an unknown reason when using Build Tools for Visual Studio 2022 for MNN. We will analyze the error messages and the CMakeLists.txt file to identify the potential causes of the problem.

Error Messages

The error messages indicate that the Ninja build process is failing with a series of warnings and errors. The warnings are related to unknown command-line options, and the errors are related to the build process stopping due to a subcommand failure.

[1/1076] Building CXX object CMakeFiles\MNNCore.dir\source\core\MNNMemoryUtils.cpp.obj
cl: 命令行 warning D9002 :忽略未知选项“-fprofile-arcs”
cl: 命令行 warning D9002 :忽略未知选项“-ftest-coverage”
...
[293/1076] Building CXX object CMakeFiles\MNNFuse.dir\codegen\SourceModule.cpp.obj
cl: 命令行 warning D9002 :忽略未知选项“-fprofile-arcs”
cl: 命令行 warning D9002 :忽略未知选项“-ftest-coverage”
ninja: build stopped: subcommand failed.

CMakeLists.txt Analysis

The CMakeLists.txt file is a crucial component of the build process, and any issues with this file can cause the build to fail. Let's analyze the CMakeLists.txt file to identify potential causes of the problem.

cmake_minimum_required(VERSION 3.5)
project(MNN)

# Set the C++ standard
set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

# Set the compiler flags
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fprofile-arcs -ftest-coverage")

# Find the OpenCV library
find_package(OpenCV REQUIRED)

# Find the TIFF library
find_package(TIFF REQUIRED)

# Find the Quirc library
find_package(quirc REQUIRED)

# Set the MNN build flags
set(MNN_BUILD_FLAGS "${MNN_BUILD_FLAGS} -fprofile-arcs -ftest-coverage")

# Set the MNN build type
set(MNN_BUILD_TYPE "${MNN_BUILD_TYPE} Release")

# Set the MNN build path
set(MNN_BUILD_PATH "${MNN_BUILD_PATH} C:/Users/ydlio/Project/MNN/build")

# Set the MNN build info
set(MNN_BUILD_INFO "${MNN_BUILD_INFO} System: Windows
Processor: AMD64
Version: 3.1.0
Metal: OFF
OpenCL: ON
OpenGL: OFF
Vulkan: ON
ARM82: ON
KleidiAI: OFF
oneDNN: OFF
TensorRT: OFF
CoreML: OFF
NNAPI: OFF
CUDA: OFF
OpenMP: OFF
BF16: ON
ThreadPool: ON
Hidden: FALSE")

# Set the MNN build command
set(MNN_BUILD_COMMAND "${MNN_BUILD_COMMAND} ninja")

# Set the MNN build output
set(MNN_BUILD_OUTPUT "${MNN_BUILD_OUTPUT} C:/Users/ydlio/Project/MNN/build")

Potential Causes of the Problem

Based on the error messages and the CMakeLists.txt file, there are several potential causes of the problem:

Unknown Command-Line Options: The error messages indicate that the compiler is ignoring unknown command-line options. This could be due to a mismatch between the compiler flags and the compiler version.
CMake Version: The CMakeLists.txt file specifies a minimum CMake version of 3.5, but the error messages indicate that the CMake version is 3.19.0.0. This could be due to a mismatch between the CMake version and the CMakeLists.txt file.
Compiler Flags: The CMakeLists.txt file sets the compiler flags to include -fprofile-arcs and -ftest-coverage, but the error messages indicate that the compiler is ignoring these flags. This could be due to a mismatch between the compiler flags and the compiler version.
MNN Build Flags: The CMakeLists.txt file sets the MNN build flags to include -fprofile-arcs and -ftest-coverage, but the error messages indicate that the compiler is ignoring these flags. This could be due to a mismatch between the MNN build flags and the compiler version.

Conclusion

In conclusion, the Ninja building failed for an unknown reason when using Build Tools for Visual Studio 2022 for MNN. The error messages indicate that the compiler is ignoring unknown command-line options, and the CMakeLists.txt file analysis suggests that there may be a mismatch between the compiler flags and the compiler version. To resolve this issue, we need to investigate further and identify the root cause of the problem.

Recommendations

Based on the analysis, we recommend the following:

Update the CMake Version: Update the CMake version to match the version specified in the CMakeLists.txt file.
Update the Compiler Flags: Update the compiler flags to match the version specified in the CMakeLists.txt file.
Update the MNN Build Flags: Update the MNN build flags to match the version specified in the CMakeLists.txt file.
Investigate Further: Investigate further to identify the root cause of the problem and resolve it.

Introduction

In our previous article, we explored the issue of Ninja building failing for an unknown reason when using Build Tools for Visual Studio 2022 for MNN. We analyzed the error messages and the CMakeLists.txt file to identify potential causes of the problem. In this article, we will provide a Q&A section to help you better understand the issue and its potential solutions.

Q: What are the common causes of Ninja building failing for an unknown reason?

A: The common causes of Ninja building failing for an unknown reason include:

Unknown command-line options
Mismatch between the compiler flags and the compiler version
Mismatch between the CMake version and the CMakeLists.txt file
Mismatch between the MNN build flags and the compiler version

Q: How can I resolve the issue of unknown command-line options?

A: To resolve the issue of unknown command-line options, you can try the following:

Check the compiler flags in the CMakeLists.txt file to ensure they match the version specified in the file.
Update the compiler flags to match the version specified in the CMakeLists.txt file.
Check the compiler version to ensure it matches the version specified in the CMakeLists.txt file.

Q: How can I resolve the issue of mismatch between the compiler flags and the compiler version?

A: To resolve the issue of mismatch between the compiler flags and the compiler version, you can try the following:

Check the compiler flags in the CMakeLists.txt file to ensure they match the version specified in the file.
Update the compiler flags to match the version specified in the CMakeLists.txt file.
Check the compiler version to ensure it matches the version specified in the CMakeLists.txt file.

Q: How can I resolve the issue of mismatch between the CMake version and the CMakeLists.txt file?

A: To resolve the issue of mismatch between the CMake version and the CMakeLists.txt file, you can try the following:

Check the CMake version to ensure it matches the version specified in the CMakeLists.txt file.
Update the CMake version to match the version specified in the CMakeLists.txt file.
Check the CMakeLists.txt file to ensure it is up-to-date and matches the CMake version.

Q: How can I resolve the issue of mismatch between the MNN build flags and the compiler version?

A: To resolve the issue of mismatch between the MNN build flags and the compiler version, you can try the following:

Check the MNN build flags in the CMakeLists.txt file to ensure they match the version specified in the file.
Update the MNN build flags to match the version specified in the CMakeLists.txt file.
Check the compiler version to ensure it matches the version specified in the CMakeLists.txt file.

Q: What are the best practices for resolving Ninja building issues?

A: The best practices for resolving Ninja building issues include:

Checking the error messages to identify the root cause of the problem.
Analyzing the CMakeLists.txt file to identify potential causes of the problem.
Updating the compiler flags, CMake version, and MNN build flags to match the version specified in the CMakeLists.txt file.
Checking the compiler version to ensure it matches the version specified in the CMakeLists.txt file.

Conclusion

In conclusion, the Ninja building failed for an unknown reason when using Build Tools for Visual Studio 2022 for MNN. The error messages indicate that the compiler is ignoring unknown command-line options, and the CMakeLists.txt file analysis suggests that there may be a mismatch between the compiler flags and the compiler version. By following the Q&A section, you should be able to resolve the issue and successfully build the MNN project using Build Tools for Visual Studio 2022.