portbash/stdio.sh

   1 #! /bin/sh
   2 #
   3 # test certain aspects of stdio
   4 CC=cc
   5 export CC
   6
   7 cat > x.c << EOF
   8 #include <stdio.h>
   9 #include <varargs.h>
  10
  11 xp(va_alist)
  12 va_dcl
  13 {
  14         va_list args;
  15         va_start (args);
  16         vfprintf(stdout, "abcde", args);
  17 }
  18
  19 main()
  20 {
  21         xp();
  22         exit(0);
  23 }
  24 EOF
  25
  26 if ${CC} x.c >/dev/null 2>&1
  27 then
  28         echo '#define HAVE_VFPRINTF'
  29         rm -f x.c x.o a.out
  30 else
  31
  32         cat > x.c << EOF
  33 #include <stdio.h>
  34
  35 main()
  36 {
  37         _doprnt();
  38 }
  39 EOF
  40
  41         if ${CC} x.c >/dev/null 2>&1
  42         then
  43                 echo '#define USE_VFPRINTF_EMULATION'
  44                 rm -f x.c x.o a.out
  45         fi
  46 fi
  47
  48 cat > x.c << EOF
  49 #include <stdio.h>
  50 main()
  51 {
  52         setlinebuf(stdout);
  53 }
  54 EOF
  55
  56 if ${CC} x.c > /dev/null 2>&1
  57 then
  58         rm -f x.c x.o a.out
  59         echo '#define HAVE_SETLINEBUF'
  60 else
  61         # check for setvbuf
  62         # If this compiles, the system has setvbuf.  If this segfaults while
  63         # running, non-reversed systems get a seg violation
  64
  65         cat > x.c << EOF
  66 #include <stdio.h>
  67
  68 main()
  69 {
  70         setvbuf(stdout, _IOLBF, (char *)0, BUFSIZ);     /* reversed */
  71         exit(0);                /* non-reversed systems segv */
  72 }
  73 EOF
  74
  75         if ${CC} x.c >/dev/null 2>&1 ; then
  76                 echo '#define HAVE_SETVBUF'
  77                 if a.out; then
  78                         :
  79                 else
  80                         rm -f core
  81                         echo '#define REVERSED_SETVBUF_ARGS'
  82                 fi
  83         fi
  84 fi
  85
  86 rm -f x.c x.o a.out
  87 exit 0