| Copyright © 1997, 1998 ARM Limited. All rights reserved. | ARM DUI 0040D |
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| Home > Introduction > What is new? > Obsolete and deprecated features |
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The features listed below are either obsolete or deprecated. Obsolete features are identified explicitly. Their use is faulted in SDT 2.50. Deprecated features will be made obsolete in future ARM toolkit releases. Their use is warned about in SDT 2.50. These features are described in:
Because the preferred (and default) image format for the SDT is now ELF, the linker emits a warning when instructed to generate an AIF image, a binary AIF image, an IHF image or a plain binary image.
Any makefiles with a link step of -aif, -aif
-bin, -ihf, or -bin now
produce a warning from the linker. For existing APM projects where
an Absolute AIF image has been requested on the Linker configuration Output tab,
there will be no warning. However, an ELF image is created instead,
because this is the new default for the linker.
The preferred way to generate an image in an deprecated format is to create an ELF format image from the linker, and then to use the new fromELF tool to translate the ELF image into the desired format.
This feature is obsolete. The Shared Library support provided
by previous versions of the SDT has been removed for SDT 2.50. The
linker faults the use of the -shl command-line
option.
Any makefile or APM project file that uses the Shared Library mechanism will now generate an error from the linker. The SDT 2.11a linker can be used if this facility is required.
Use of the -overlay option to the linker
and use of the OVERLAY keyword in a scatter load description
file are now warned against by the linker.
Any makefile, APM project file, or scatter load description file that uses the overlay mechanism will now generate a warning from the linker.
Use of a frame pointer call standard when compiling C or C++ code is warned against in the SDT 2.50 and ARM C++ 1.10 versions of the compilers.
Any makefile or APM project file that uses a frame pointer
call standard ( -apcs /fp) will now generate a
warning from the compilers.
Use of the reentrant procedure call standard when compiling C or C++ code is warned against in the SDT 2.50 and ARM C++ 1.10 versions of the compilers.
Any makefile or APM project file that uses the reentrant procedure
call standard (-apcs /reent) will now generate
a warning from the compilers.
Because the preferred (and default) debug table format is now DWARF 2, the compilers and assembler will warn when asked to generate ASD debug tables.
Any makefiles with a compiler or assembler command-line option
of -g+ –asd will now produce a warning. For existing
APM projects in which debugging information has been requested,
there will be no warning and DWARF 2 debug tables will be emitted instead,
because this is the new default for the compilers and assembler.
This feature is obsolete. The Demon Debug monitor is now obsolete
and support for it has been removed from the SDT. There is no longer
a remote_d.dll selectable as a remote debug connection
in ADW, and Demon C libraries are not supplied with SDT 2.50.
This feature is obsolete. Full Angel is no longer available
as a library to be linked with a client application. The version
of Angel that runs on an EmbeddedICE and acts as an ADP debug monitor
(adpjtag.rom) is also no longer available.
In the SDT 2.11 manuals, use of the ROOT, ROOT-DATA and OVERLAY keywords
in a scatter load description file was documented, and a later Application
Note warned against its use. The linker now warns against use of
these keywords.
Any existing scatter load descriptions that use ROOT, ROOT-DATA or OVERLAY keywords
will now generate a warning, but the behavior will be as expected.
In SDT 2.11a, the linker warned of calls made from ARM code
to Thumb code or from Thumb code to ARM code (interworking calls)
when the destination of the call was not compiled for interworking
with the -apcs /interwork option. In spite of the
warning, an interworking return veneer was inserted.In SDT 2.50,
the linker faults inter-working calls to code that cannot return
directly to the instruction set state of the caller, and creates
no executable image.
The assembler now warns about the use of the deprecated field specifiers CPSR, CPSR_flg, CPSR_ctl, CPSR_all, SPSR, SPSR_flg, SPSR_ctl, and SPSR_all.
The ORG directive is no longer supported in the
assembler. Its use conflicts with the scatter loading mechanism
supported by the linker.
| Copyright © 1997, 1998 ARM Limited. All rights reserved. | ARM DUI 0040D |
| PDF version | |
| Home > Introduction > What is new? > Obsolete and deprecated features |