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Developing Compaq COBOL Programs
1.2 Developing Programs on Tru64 UNIX
2.
% cobol -V *.cob
Compaq COBOL source files with file names that end with .cob are compiled
into temporary object files, which are then passed to the
ld
linker. The
ld
linker produces the a.out file.
When the compilation completes, the
cobol
driver returns one of the following
status values:
0—SUCCESS
1—FAILURE
2—SUBPROCESS_FAILURE (
cobol
or
cc
)
3—SIGNAL
1.2.2.11 Other Compilers
You can compile and link multilanguage programs using a single
cobol
command.
The
cobol
command recognizes C or Assembler program files by their file
suffix characters and passes them to the
cc
compiler for compilation. Before
compilation,
cc
applies the
cpp
preprocessor to files that it recognizes, such as
any file with a
.c
suffix.
Certain flags passed to
cc
are passed to the
ld
linker.
1.2.2.12 Interpreting Messages from the Compiler
The Compaq COBOL compiler identifies syntax errors and violations of language
rules in the program. If the compiler finds any errors, it writes messages to
the
stderr
output file and any listing file. If you enter the
cobol
command
interactively, the messages are displayed on your terminal.
Compiler messages have the following format:
cobol: severity: filename, line n, message-text
[text-in-error]
--------^
The pointer (
--^
) indicates the exact place on the source line where the error was
found. For example, the following error message shows the format and message
text in a listing file when an END DO statement was omitted:
cobol: Severe: disp.cob, line 7: Missing period is assumed
05 VAR-1 PIC X.
--------^
The severity level is one of the following:
Severe The compiler does not produce an object module. You must correct
the error before you can compile the program to produce an object
module.
Error The compiler makes an assumption about what you intended and
continues. However, the compiler’s assumption may not relate to
your intention. Correct the error.
Warning The compiler attempts to correct the error in the statement,
but you should verify that the compiler’s action is acceptable.
Otherwise, your program may produce unexpected results.
Informational This message usually appears with other messages to inform you
of specific actions taken by the compiler. No action is necessary on
your part.
1–18 Developing Compaq COBOL Programs