Intel(R) Fortran Compiler for Linux* Systems User's Guide Volume I ...

Intel® Fortran Compiler for Linux* Systems User's Guide Volume I: Building
Applications
write(10) c8
write(10) c4
close(10)
C read big endian data and operate with them on
C little endian machine
open(100,file='big.tmp',form='unformatted')
read(100) cc8
read(100) cc4
C
Any operation with data, which have been read
C . . .
close(100)
stop
end
Now compare lit.tmp and big.tmp files with the help of od utility.
> od -t x4 lit.tmp
0000000 00000008 00000315 00000000 00000008
0000020 00000004 000001c8 00000004
0000034
> od -t x4 big.tmp
0000000 08000000 00000000 15030000 08000000
0000020 04000000 c8010000 04000000
0000034
You can see that the byte order is different in these files.
OPEN Statement CONVERT Method
You can use this method to specify a non-native numeric format for each
specified unit number. This method requires an explicit file OPEN statement to
specify the numeric format of the file for that unit number.
This method takes precedence over the OPTIONS statement and the compiler
option -convert keyword method, but has a lower precedence than the
environment variable methods.
For example, the following source code shows how the OPEN statement would
be coded to read unformatted VAXD numeric data from unit 15, which might be
processed and possibly written in native little endian format to unit 20. (Tthe
absence of the CONVERT keyword or environment variables FORT_CONVERT20,
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