cmake config_error ai_generated partial

CMake Error: check_ipo_supported() failed - LTO not supported by compiler / toolchain

ID: cmake/check-ipos-supported-false

Also available as: JSON · Markdown · 中文

80%Fix Rate

87%Confidence

1Evidence

2024-05-08First Seen

Version Compatibility

Version	Status	Introduced	Deprecated	Notes
cmake 3.21.0	active	—	—	—
cmake 3.22.0	active	—	—	—
cmake 3.23.0	active	—	—	—

Root Cause

The compiler or linker does not support Link-Time Optimization (LTO) for the current build configuration, or the check_ipo_supported() call detected incompatibility.

generic

中文

编译器或链接器不支持当前构建配置的链接时优化 (LTO)，或者 check_ipo_supported() 调用检测到不兼容。

Official Documentation

https://cmake.org/cmake/help/latest/module/CheckIPOSupported.html

Workarounds

95% success Disable LTO for the affected target by setting the property explicitly: set_target_properties(mytarget PROPERTIES INTERPROCEDURAL_OPTIMIZATION FALSE) Or set globally: set(CMAKE_INTERPROCEDURAL_OPTIMIZATION FALSE)
```
Disable LTO for the affected target by setting the property explicitly:

set_target_properties(mytarget PROPERTIES INTERPROCEDURAL_OPTIMIZATION FALSE)

Or set globally:

set(CMAKE_INTERPROCEDURAL_OPTIMIZATION FALSE)
```
80% success Use a compiler that supports LTO (e.g., GCC 4.9+ or Clang 3.9+). For GCC, ensure the 'gold' linker is available: sudo apt-get install binutils-gold Then reconfigure with: cmake -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=TRUE -DCMAKE_LINKER=/usr/bin/ld.gold /path/to/source
```
Use a compiler that supports LTO (e.g., GCC 4.9+ or Clang 3.9+). For GCC, ensure the 'gold' linker is available:

sudo apt-get install binutils-gold

Then reconfigure with:

cmake -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=TRUE -DCMAKE_LINKER=/usr/bin/ld.gold /path/to/source
```

中文步骤

通过显式设置属性来禁用受影响目标的 LTO：

set_target_properties(mytarget PROPERTIES INTERPROCEDURAL_OPTIMIZATION FALSE)

或全局设置：

set(CMAKE_INTERPROCEDURAL_OPTIMIZATION FALSE)

使用支持 LTO 的编译器（例如 GCC 4.9+ 或 Clang 3.9+）。对于 GCC，确保 'gold' 链接器可用：

sudo apt-get install binutils-gold

然后使用以下命令重新配置：

cmake -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=TRUE -DCMAKE_LINKER=/usr/bin/ld.gold /path/to/source

Dead Ends

Common approaches that don't work:

Set CMAKE_INTERPROCEDURAL_OPTIMIZATION to TRUE manually 70% fail
Overrides the check but may cause linker errors if the toolchain genuinely lacks LTO support; build will fail later.
Upgrade CMake to the latest version 90% fail
LTO support depends on the compiler, not CMake version; upgrading CMake does not add LTO to an unsupported compiler.