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编译错误“ undefined reference to ‘sqrt‘ ”解决方法小结 当在C程序中使用sqrt ()函数并遇到编译错误undefined reference to 'sqrt'时，问题在于gcc没有默认链接math库。 解决方法是在gcc编译时添加-lm选项，或者在CMakeLists txt或makefile中指定链接math库。
sqrt, sqrtf, sqrtl - cppreference. com Errors are reported as specified in math_errhandling Domain error occurs if arg is less than zero If the argument is less than -0, FE_INVALID is raised and NaN is returned If the argument is +∞ or ±0, it is returned, unmodified If the argument is NaN, NaN is returned
Undefined reference to `sqrtf - STM32F4 DSP libra . . . If I'm not totally wrong, sqrt (and sqrtf) reside in libm a, but I can nowhere detect a '-lm' among the compiler linker flags Perhaps you need to add it manually to the project settings
Undefined Reference To ‘sqrt’: What Are the Reasons? You can fix the undefined reference to ‘sqrt’ error by appending the -lm linker option to your GCC program compilation command on Linux or Unix systems Plus, linking the math library through the target_link_libraries (<filename extension> m) in CMakeLists txt will help resolve the error instantly