XL Fortran Enterprise Edition for AIX : User's Guide - IBM

Table 22. Table for Binding an Application Written Only in Fortran
Fortran program using asynchronous I/O statements
Type of
Linking Yes No
Dynamic xlf95 -o t t.f xlf95 -o t t.f
Static
xlf95 -o t t.f
-bnso -bnodelcsect
-bI:/lib/syscalls.exp
-lc -bI:/lib/aio.exp
xlf95 -o t t.f
-bnso -bnodelcsect
-bI:/lib/syscalls.exp
Table 23. Table for Binding an Application Written in Both Fortran and C, Where the C
Routines Call the libc Asynchronous I/O Routines
Fortran program using asynchronous I/O statements
Type of
Linking Yes No
Dynamic xlf95 -o t t.f c.o -lc xlf95 -o t t.f c.o -lc
Static
xlf95 -o t t.f c.o
-bnso -bnodelcsect
-bI:/lib/syscalls.exp
-lc -bI:/lib/aio.exp
Note: c.o is an object file of routines written in C.
xlf95 -o t t.f c.o
-bnso -bnodelcsect
-bI:/lib/syscalls.exp
-lc -bI:/lib/aio.exp
You can bind an application that uses asynchronous I/O on a system with AIX
asynchronous I/O disabled. However, you must run the resulting executable on a
system with AIX asynchronous I/O enabled.
Error Handling
For an asynchronous data transfer, errors or end-of-file conditions might occur
either during execution of the data transfer statement or during subsequent data
transfer. If these conditions do not result in the termination of the program, you
can detect these conditions via ERR=, END= and IOSTAT= specifiers in the data
transfer or in the matching WAIT statement.
Execution of the program terminates if an error condition occurs during execution
or during subsequent data transfer of an input/output statement that contains
neither an IOSTAT= nor an ERR= specifier. In the case of a recoverable error, if the
IOSTAT= and ERR= specifiers are not present, the program terminates if you set
the err_recovery run-time option to no. If you set the err_recovery run-time option
to yes, recovery action occurs, and the program continues.
If an asynchronous data transfer statement causes either of the following events, a
matching WAIT statement cannot run, because the ID= value is not defined:
v A branch to the label that you specified by ERR= or END=
v The IOSTAT= specifier to be set to a non-zero value
XL Fortran Thread-Safe I/O Library
The XL Fortran thread-safe I/O library libxlf90_r.a provides support for parallel
execution of Fortran I/O statements. For Fortran programs that contain I/O
statements in a parallelized loop or that create multiple threads and execute I/O
340 XL Fortran Enterprise Edition for AIX : User’s Guide