1  #include <dlfcn.h>
       2  #include <stdio.h>
       3  #include <string.h>
       4  
       5  static int
       6  do_test (void)
       7  {
       8    Dl_info i;
       9    if (dladdr (&printf, &i) == 0)
      10      {
      11        puts ("not found");
      12        return 1;
      13      }
      14    printf ("found symbol %s in %s\n", i.dli_sname, i.dli_fname);
      15    if (i.dli_sname == NULL)
      16      return 1;
      17  
      18  #if __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
      19    /* On architectures which redirect long double to
      20       _Float128 (e.g powerpc64le), printf will resolve
      21       to __printfieee128 due to header redirects.  There
      22       is no _IO_printfieee128 alias.  */
      23    return strcmp (i.dli_sname, "__printfieee128") != 0;
      24  #else
      25    return i.dli_sname == NULL
      26  	 || (strcmp (i.dli_sname, "printf") != 0
      27  	     /* On architectures which create PIC code by default
      28  		&printf may resolve to an address in libc.so
      29  		rather than in the binary.  printf and _IO_printf
      30  		are aliased and which one comes first in the
      31  		hash table is up to the linker.  */
      32  	     && strcmp (i.dli_sname, "_IO_printf") != 0);
      33  #endif
      34  }
      35  
      36  #include <support/test-driver.c>