getting undefined reference `__locale_ctype_ptr' and `__getreent' when using /usr/lib/gcc/x86_64-w64-mingw32 on Cygwin64

Question

I am trying to build project on Cygwin64 using x86_64-w64-mingw32

Added compiler in CMakeList.txt: set(CMAKE_C_COMPILER x86_64-w64-mingw32-gcc) set(CMAKE_CXX_COMPILER x86_64-w64-mingw32-g++)

but getting below mentioned undefined reference while doing make

/usr/lib/gcc/x86_64-w64-mingw32/11/../../../../x86_64-w64-mingw32/bin/ld: /cygdrive/c/test/myprogram.o:myprogram.c:(.text+0x76): undefined reference to __locale_ctype_ptr'** /usr/lib/gcc/x86_64-w64-mingw32/11/../../../../x86_64-w64-mingw32/bin/ld: /cygdrive/c/test/myprogram.o:myprogram.c:(.text+0x38d): **undefined reference to __getreent'

please suggest how can i resolve above error.

Thanks in advance