void utf8c1251 (const char *from, char *to)
{
    size_t fl, tl; 
    
    iconv_t d; 
    fl=tl=strlen(from); 
    d=iconv_open("CP1251","UTF-8"); 
    iconv(d, &from,&fl,&to,&tl); 
    iconv_close(d);                               
}

1.cpp:25:2: warning: no newline at end of file
/var/tmp//ccmRr1iA.o(.text+0x2a): In function `utf8c1251(char const*, char*)':
: undefined reference to `libiconv_open'
/var/tmp//ccmRr1iA.o(.text+0x54): In function `utf8c1251(char const*, char*)':
: undefined reference to `libiconv'
/var/tmp//ccmRr1iA.o(.text+0x5f): In function `utf8c1251(char const*, char*)':
: undefined reference to `libiconv_close'
/var/tmp//ccmRr1iA.o(.eh_frame+0x11): undefined reference to `__gxx_personality_v0'