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  • Library build is now reproducible when running make -j
  • Fix a constant folding crash with nested records.
  • The --relax=impure option allows pure functions to call impure functions.
  • Name resolution and overload resolution has been completely rewritten which should fix a number of long-standing issues.
  • Fixed a crash when a record aggregate contains an "others" association and the fields have array types with different lengths.
  • Added support for VHDL-2008 "all" sensitised processes.
  • Added support for ports and generics in block statements.
  • Added support for the 'BASE attribute.
  • Type name now allowed in element association choice (#407).
  • Implement textio READ procedure for BIT and TIME (#408).
  • LLVM 6.0 or later required to build.
  • Fixed a crash when a long running procedure suspends in a loop (#412).
  • Fixed a stack overflow when a subprogram with unconstrained array arguments is called repeatedly in a loop (#414).
  • Compiled VHDL code now includes DWARF debug information which is used for runtime stack trace if libdw or libdwarf is installed.
  • Added support for MINIMUM, MAXIMUM, and TO_STRING predefined operators in VHDL-2008.
  • Support for the LXT wave output format, which was deprecated in version 1.5, has been removed. Use the default FST format instead.
  • VCD files are now generated from FST data in a similar manner to fst2vcd(1). This should improve compatibility with other tools.
  • The fetch-ieee.sh script which did nothing since the last release has been removed.
  • Added support for VHDL-2008 element resolution.
  • The VHDL-1993 standard libraries are now derived from the Apache 2.0 licensed sources from VHDL-2019.
  • Added support for VHDL-2008 reduction operators, match operators, and condition conversion.
  • VHDL-2008 IEEE standard libraries are now built and installed in addition to the VHDL-1993 libraries.
  • Variable assignment now support aggregate targets.
  • Fix a crash when using 'VALUE with enumeration subtypes (#419).
  • The --codegen command, which has been deprecated since 1.3, was removed.

1.5 - 2020-07-19

  • IEEE library sources are now distributed
  • Updated FST library to match GtkWave 3.3.79
  • The LXT wave output format is deprecated, use FST instead
  • Fix incorrect file name in assertion message
  • Fix crash while recovering from parse error
  • Add --dump-json command to print AST as JSON (from Sebastien Van Cauwenberghe)
  • Fix crash when using LLVM 7 and later
  • Fix spurious assertion failure in std.textio.readline
  • Reals are now rounded to the nearest integer as specified by the LRM
  • Fix crash when constant folding uses too much memory
  • Improved memory management in evaluator (thanks to Frank Mori Hess)
  • Various other minor fixes and improvements

1.4 - 2018-07-16

  • Windows with MSYS2 is now fully supported
  • Continuous integration for OS X and Windows using Travis and AppVeyor
  • Record resolution functions are now supported
  • The --relax=prefer-explicit option now works correctly

1.3 - 2017-12-31

  • Native code is always generated on platforms that support it
  • Initial support for VHDL-2017 conditional compilation blocks
  • The TCL shell has been removed
  • Various code generation and constant folding fixes
  • Fix crash when build IEEE library from non-clean tree
  • ORC is used for JIT if LLVM version is 3.9 or later
  • LLVM 3.8 or later is now required
  • Added -O0 to -O3 options to control LLVM optimisation level
  • The --disable-opt option is deprecated, use -O0 instead
  • The elaborate --native option is now a global option and should be placed before the -e command
  • The --codegen command is deprecated, use --native when analysing to generate native shared libraries for packages

1.2 - 2017-05-04

  • Compile time evaluation now uses vcode
  • Record aggregates can now be constant folded (#305)
  • The TCL shell is deprecated and will be removed in the next release
  • Compatible with LLVM 4.0
  • Functions returning records can now be constant folded (#315)
  • LLVM 3.4 or later is now required

1.1 - 2016-11-05

  • Improvements to based literal parsing
  • Improved stack traces on Linux when libdw-dev installed
  • Fixed elaboration of subprograms in entity declarations
  • Improved elaboration performance when design contains many signals
  • Fixed various bugs involving record signals
  • Fixed sensitivity list generation for concurrent procedure calls
  • Improvements to simulation performance
  • Implemented vhpi_get_phys
  • Added command --list to print all units in a library
  • Rewrote the run_regr program in C so make check no longer requires Ruby
  • The --relax=generic-static option is now renamed to --relax=locally-static and applies in wider range of contexts

1.0 - 2016-05-01

  • First stable release