- --version
- Display Copyright and version, then exit disregarding all other options.
- --help
- If --version was not used, display usage, then exit disregarding
all other options.
- -a
- Indicates that, if supported by the platform, the adainit procedure should
be treated as an initialisation routine by the linker (a constructor). This
is intended to be used by the Project Manager to automatically initialize
shared Stand-Alone Libraries.
- -aO
- Specify directory to be searched for ALI files.
- -aI
- Specify directory to be searched for source file.
- -A
- Generate binder program in Ada (default)
- -b
- Generate brief messages to stderr even if verbose mode set.
- -c
- Check only, no generation of binder output file.
- -C
- Generate binder program in C
- -dnn[k|m]
- This switch can be used to change the default task stack size value
to a specified size nn, which is expressed in bytes by default, or
in kilobytes when suffixed with k or in megabytes when suffixed
with m.
In the absence of a [k|m] suffix, this switch is equivalent, in effect,
to completing all task specs with
pragma Storage_Size (nn);
When they do not already have such a pragma.
- -Dnn[k|m]
- This switch can be used to change the default secondary stack size value
to a specified size nn, which is expressed in bytes by default, or
in kilobytes when suffixed with k or in megabytes when suffixed
with m.
The secondary stack is used to deal with functions that return a variable
sized result, for example a function returning an unconstrained
String. There are two ways in which this secondary stack is allocated.
For most targets, the secondary stack is growing on demand and is allocated
as a chain of blocks in the heap. The -D option is not very
relevant. It only give some control over the size of the allocated
blocks (whose size is the minimum of the default secondary stack size value,
and the actual size needed for the current allocation request).
For certain targets, notably VxWorks 653,
the secondary stack is allocated by carving off a fixed ratio chunk of the
primary task stack. The -D option is used to define the
size of the environment task's secondary stack.
- -e
- Output complete list of elaboration-order dependencies.
- -E
- Store tracebacks in exception occurrences when the target supports it.
This is the default with the zero cost exception mechanism.
See also the packages
GNAT.Traceback and
GNAT.Traceback.Symbolic for more information.
Note that on x86 ports, you must not use -fomit-frame-pointer
gcc option.
- -F
- Force the checks of elaboration flags. gnatbind does not normally
generate checks of elaboration flags for the main executable, except when
a Stand-Alone Library is used. However, there are cases when this cannot be
detected by gnatbind. An example is importing an interface of a Stand-Alone
Library through a pragma Import and only specifying through a linker switch
this Stand-Alone Library. This switch is used to guarantee that elaboration
flag checks are generated.
- -h
- Output usage (help) information
- -I
- Specify directory to be searched for source and ALI files.
- -I-
- Do not look for sources in the current directory where
gnatbind was
invoked, and do not look for ALI files in the directory containing the
ALI file named in the gnatbind command line.
- -l
- Output chosen elaboration order.
- -Lxxx
- Bind the units for library building. In this case the adainit and
adafinal procedures (see Binding with Non-Ada Main Programs)
are renamed to xxxinit and
xxxfinal.
Implies -n.
(See GNAT and Libraries, for more details.)
- -Mxyz
- Rename generated main program from main to xyz. This option is
supported on cross environments only.
- -mn
- Limit number of detected errors to n, where n is
in the range 1..999_999. The default value if no switch is
given is 9999. Binding is terminated if the limit is exceeded.
Furthermore, under Windows, the sources pointed to by the libraries path
set in the registry are not searched for.
- -n
- No main program.
- -nostdinc
- Do not look for sources in the system default directory.
- -nostdlib
- Do not look for library files in the system default directory.
- --RTS=rts-path
- Specifies the default location of the runtime library. Same meaning as the
equivalent gnatmake flag (see Switches for gnatmake).
- -o file
- Name the output file file (default is b~xxx.adb).
Note that if this option is used, then linking must be done manually,
gnatlink cannot be used.
- -O
- Output object list.
- -p
- Pessimistic (worst-case) elaboration order
- -R
- Output closure source list.
- -s
- Require all source files to be present.
- -Sxxx
- Specifies the value to be used when detecting uninitialized scalar
objects with pragma Initialize_Scalars.
The xxx string specified with the switch may be either
- “in” requesting an invalid value where possible
- “lo” for the lowest possible value
- “hi” for the highest possible value
- “xx” for a value consisting of repeated bytes with the
value 16#xx# (i.e. xx is a string of two hexadecimal digits).
In addition, you can specify -Sev to indicate that the value is
to be set at run time. In this case, the program will look for an environment
variable of the form GNAT_INIT_SCALARS=xx, where xx is one
of in/lo/hi/xx with the same meanings as above.
If no environment variable is found, or if it does not have a valid value,
then the default is in (invalid values).
- -static
- Link against a static GNAT run time.
- -shared
- Link against a shared GNAT run time when available.
- -t
- Tolerate time stamp and other consistency errors
- -Tn
- Set the time slice value to n milliseconds. If the system supports
the specification of a specific time slice value, then the indicated value
is used. If the system does not support specific time slice values, but
does support some general notion of round-robin scheduling, then any
nonzero value will activate round-robin scheduling.
A value of zero is treated specially. It turns off time
slicing, and in addition, indicates to the tasking run time that the
semantics should match as closely as possible the Annex D
requirements of the Ada RM, and in particular sets the default
scheduling policy to FIFO_Within_Priorities.
- -un
- Enable dynamic stack usage, with n results stored and displayed
at program termination. A result is generated when a task
terminates. Results that can't be stored are displayed on the fly, at
task termination. This option is currently not supported on Itanium
platforms. (See Dynamic Stack Usage Analysis for details.)
- -v
- Verbose mode. Write error messages, header, summary output to
stdout.
- -wx
- Warning mode (x=s/e for suppress/treat as error)
- -Wxe
- Override default wide character encoding for standard Text_IO files.
- -x
- Exclude source files (check object consistency only).
- -y
- Enable leap seconds support in
Ada.Calendar and its children.
- -z
- No main subprogram.