'How to solve undefined reference

when I was compiling a C program by GCC compiler, a problems occured as follows:

AppData\Local\Temp\ccGGIeQR.o:bst.c:(.text+0x81): undefined reference to `BiTree_NextOrder' collect2.exe: error: ld returned 1 exit status

c gcc compilation

Solution 1:^[1]

The error means that your file ccGGIeQR.o:bst.c uses BiTree_NextOrder (probably a function), but the implementation of BiTree_NextOrder was not found when you tried to link your program. You have to locate BiTree_NextOrder and either link in the corresponding object file or library:

gcc ccGGIeQR.o:bst.o BiTree_NextOrder.o -o your_program
gcc ccGGIeQR.o:bst.o -o your_program -lBiTree # perhaps?

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'How to solve undefined reference

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