Getting an error while linking a .so file with the NDK

Why am I getting this err开发者_JAVA技巧or while linking a shared object file?

$ gcc calcicall.c -o dynamically_linked -L. libcalcimethods.so.1.0.1
/usr/lib/gcc/i686-pc-cygwin/4.3.4/../../../libcygwin.a(libcmain.o):(.text+0xa9)
 undefined reference to `_WinMain@16'

collect2: ld returned 1 exit status

Can someone help me? Thanks

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undefined reference to `_WinMain@16'

You are compiling and linking it as an executable. Use -shared to compile and link it as Shared object or otherwise define main function in your program.