The Embedded Experts

Release notes for SEGGER Toolchain

Release 24. Nov 2020

Compiler

Version 11.2.0

  • Improvements
    1. Improve inlining: All functions with large stack called in the same function are either all inlined or none of them are inlined.
    2. Several small optimizations improving code size and speed.

Version 11.0.3

  • Improvements
    1. Functions with large stack requirement are not inlined any more.
  • Program corrections
    1. Don't use indirect calls to weak functions to allow the linker to eliminate the call.
    2. Under certain circumstances the spiller could take a wrong register. Fixed.

Version 11.0.0

  • New Features
    1. Merged with clang-11
    2. Activated function outliner when optimizing for size
  • Improvements
    1. Error "anonymous bit-field cannot have qualifiers" was turned into a warning
    2. Many improvements to the code generation and optimization

Version 10.6.6

  • New Features
    1. Introduced compiler identification macro __SEGGER_CC__.
  • Program corrections
    1. MUL instructions were not coded correctly if inside an IT block, which causes the assembler to break. Fixed.

Assembler

Version 2.10.0

Linker

Version 4.00.0

  • New features
    1. Added support for RISC-V processors.

Version 3.20.5

  • Improvements
    1. Unconditionally generate region symbols when requested, rather than generating only the region symbols used by the linked application. This enables the Embedded Studio IDE to display firmware regions in the Output and Memory Use windows.

Version 3.20.4

  • New Features
    1. Added --warn-deprecated and --no-warn-deprecated to advise of scheduled changes.

Version 3.20.2

  • New Features
    1. Added assert statement.

Version 3.20.0

  • New Features
    1. Detection of unintended/any use of "double" AEABI functions controlled by --warn-all-double, --warn-unintended-double, and --no-warn-double.
    2. Demand-load of appropriate archives controlled by --lazy-load-archives and --no-lazy-load-archives which can improve linker performance with very large archives (> 20 MB).
    3. Optimization of C++ exception handling tables controlled by --optimize-exception-table and --no-optimize-exception-table.
    4. Demangling of C++ names in the map file and diagnostic messages controlled by --pretty-symbol-names, --no-pretty-symbol-names, --pretty-section-names, and --no-pretty-section-names.
    5. Address and size formats in the map file controlled by --map-addr-format and --map-size-format.
    6. Wrapping or truncation of excessive-width columns in the map file controlled by --map-wrap and --no-map-wrap.
    7. Inclusion of exception table section in map file controlled by --map-exception-table and --no-map-exception-table.
    8. Control of per-section cross reference in the map file absolute listing controlled by --map-listing-xref and --no-map-listing-xref.
    9. Added --big-endian and --little-endian with support to link big-endian images.
  • Improvements
    1. Lists of sections and/or symbols are always ordered by symbol name or symbol address if only one one sort criterion makes sense.
    2. Lists of sections and values are always ordered by symbol/section name and then value, or by value and then symbol/section name to enforce a consistent sort order.
    3. Linker-created symbols are shown in symbol lists only if they are used in order to avoid clutter.
    4. Initialization table section is expanded with a better presentation.
    5. Module summary section now breaks out input object files and input object archives for a better summary presentation.
    6. Linker modified to process R_ARM_TRARGET2 relocations identically to the GNU linker. This is in conflict with the handling of R_ARM_TARGET2 defined by the document "ELF for the Arm Architecture", ARM Limited, but is required to make C++ exception handling work with the existing GCC, clang, and libunwind framework. Only use with the GNU and clang toolsets is guaranteed and tested to work with this change.
    7. Creation of synthetic output sections for fixed-size blocks created in the linker script that combine no sections (e.g. stack and heap blocks). This assists Embedded Studio to display memory usage after build, or in the Memory Usage window, accurately.

This document was first released with SEGGER Toolchain on 09. Oct 2020