modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/execute/builtins/lib/fprintf.c (about)

     1  #include <stdio.h>
     2  #include <stdarg.h>
     3  extern void abort (void);
     4  extern int inside_main;
     5  
     6  __attribute__ ((__noinline__))
     7  int
     8  fprintf (FILE *fp, const char *string, ...)
     9  {
    10    va_list ap;
    11    int r;
    12  #ifdef __OPTIMIZE__
    13    if (inside_main)
    14      abort();
    15  #endif
    16    va_start (ap, string);
    17    r = vfprintf (fp, string, ap);
    18    va_end (ap);
    19    return r;
    20  }
    21  
    22  /* Locking stdio doesn't matter for the purposes of this test.  */
    23  __attribute__ ((__noinline__))
    24  int
    25  fprintf_unlocked (FILE *fp, const char *string, ...)
    26  {
    27    va_list ap;
    28    int r;
    29  #ifdef __OPTIMIZE__
    30    if (inside_main)
    31      abort();
    32  #endif
    33    va_start (ap, string);
    34    r = vfprintf (fp, string, ap);
    35    va_end (ap);
    36    return r;
    37  }