tools/adflib/myconf

   1 #!/bin/sh
   2
   3 cat >myctest.c <<END
   4
   5 #include<stdio.h>
   6
   7 union u{
   8     long l;
   9     char c[4];
  10     };
  11
  12
  13
  14 int main(int argc, char *argv[])
  15 {
  16     union u val;
  17
  18     printf("%d ",sizeof(long));
  19     printf("%d ",sizeof(short));
  20     printf("%d ",sizeof(int));
  21
  22     val.l=1L;
  23     if (val.c[3]==1)
  24         puts("BIG");
  25     else
  26         puts("LITTLE");
  27 }
  28
  29 END
  30
  31 gcc myctest.c -o myctest
  32 rm myctest.c
  33
  34 if [ `./myctest |cut -d' ' -f 1` != 4 ]
  35     then echo "Error : sizeof(long)!=4"
  36 fi
  37 if [ `./myctest |cut -d' ' -f 2` != 2 ]
  38     then echo "Error : sizeof(short)!=2"
  39 fi
  40 if [ `./myctest |cut -d' ' -f 3` != 4 ]
  41     then echo "Error  :sizeof(int)!=4"
  42 fi
  43
  44 if [ `./myctest |cut -d' ' -f 4` = LITTLE ]
  45     then
  46     echo "#ifndef LITT_ENDIAN" >defendian.h
  47     echo "#define LITT_ENDIAN 1" >>defendian.h
  48     echo "#endif /* LITT_ENDIAN */" >>defendian.h
  49     echo Little Endian machine detected
  50 else
  51     echo "#ifndef LITT_ENDIAN" >defendian.h
  52     echo "#endif /* LITT_ENDIAN */" >>defendian.h
  53     echo Big Endian machine detected
  54 fi
  55
  56 rm myctest