What is equivalent mmap in C++ for linux?

what is equivalent mmap into C++ ?

I have code like below

LCDdata = mmap(NULL, iFrameBufferSize, PROT_READ | PROT_WRITE, MAP_FILE | MAP_SHARED, fb_fd, 0);

where LCDdata is unsigned char type pointer, iFrameBufferSize is int type and fb_fd is static int type.

when I compile it by use of arm g++ tool chain it give me error as below

error: invalid conversion from 'void*' to 'unsigned char*' [-fpermissive]

so how can I use any equivalent type function instead of mmap ?

which header file I should include ? and how this new line's syntax will become ?

I am new to C++ so I don't know about this.

Thanks and Regards