Update install docs and remove a doc build warning

This commit is contained in:
Cary R 2026-03-01 14:40:31 -08:00
parent f3506a8c92
commit 42d591d296
2 changed files with 241 additions and 54 deletions

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@ -87,7 +87,8 @@ html_theme = 'alabaster'
# Add any paths that contain custom static files (such as style sheets) here,
# relative to this directory. They are copied after the builtin static files,
# so a file named "default.css" will overwrite the builtin "default.css".
html_static_path = ['_static']
#html_static_path = ['_static']
html_static_path = []
# Custom sidebar templates, must be a dictionary that maps document names
# to template names.

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@ -2,24 +2,26 @@
Installation Guide
==================
Icarus Verilog may be installed from source code, or from pre-packaged binary
distributions. If you don't have need for the very latest, and prepackaged
binaries are available, that would be the best place to start.
Icarus Verilog may be installed from source code (either from ``git`` or a
released `tar/zip` file), or from pre-packaged binary distributions. If you
don't have a need for the very latest, and prepackaged binaries are available,
that is the easiest place to start.
Installation From Source
------------------------
Icarus is developed for Unix-like environments but can also be compiled on
Windows systems using the Cygwin environment or MinGW compilers. The following
instructions are the common steps for obtaining the Icarus Verilog source,
compiling and installing. Note that there are precompiled and/or prepackaged
versions for a variety of systems, so if you find an appropriate packaged
version, then that is the easiest way to install.
Windows systems using the `Cygwin/MSYS2` environments or `MinGW` compilers. The
following instructions are the common steps for obtaining the Icarus Verilog
source code, compiling, installing, and checking the compiled code is working
properly. Note that there are pre-compiled and/or prepackaged versions for a
variety of systems, so if you find an appropriate packaged version, then that
is the easiest way to install.
The source code for Icarus is stored under the git source code control
system. You can use git to get the latest development head or the latest of a
specific branch. Stable releases are placed on branches, and in particular v11
stable releases are on the branch "v11-branch" To get the development version
The source code for Icarus is stored under the `git` source code control
system. You can use ``git`` to get the latest development head or the latest of
a specific branch. Stable releases are placed on branches, and in particular V12
stable releases are on the branch "v12-branch" To get the development version
of the code follow these steps::
% git config --global user.name "Your Name Goes Here"
@ -29,7 +31,7 @@ of the code follow these steps::
The first two lines are optional and are used to tell git who you are. This
information is important if/when you submit a patch. We suggest that you add
this information now so you don't forget to do it later. The clone will create
a directory, named iverilog, containing the source tree, and will populate
a directory, named `iverilog`, containing the source tree, and will populate
that directory with the most current source from the HEAD of the repository.
Change into this directory using::
@ -37,19 +39,26 @@ Change into this directory using::
% cd iverilog
Normally, this is enough as you are now pointing at the most current
development code, and you have implicitly created a branch "master" that
development code, and you have implicitly created a branch `master` that
tracks the development head. However, If you want to actually be working on
the v11-branch (the branch where the latest v11 patches are) then you checkout
that branch with the command::
the `v12-branch` (the branch where the latest V12 patches are) then you
checkout that branch with the command::
% git checkout --track -b v11-branch origin/v11-branch
% git checkout --track -b v12-branch origin/v12-branch
This creates a local branch that tracks the v11-branch in the repository, and
switches you over to your new v11-branch. The tracking is important as it
This creates a local branch that tracks the `v12-branch` in the repository, and
switches you over to your new `v12-branch`. The tracking is important as it
causes pulls from the repository to re-merge your local branch with the remote
v11-branch. You always work on a local branch, then merge only when you
`v12-branch`. You always work on a local branch, then merge only when you
push/pull from the remote repository.
The choice between the development branch and the latest released branch
depends on your stability requirements. The released branch will only get bug
fixes. It will not get any enhancements or changes in the compiler output
format. Unlike many project the development branch is fairly stable with only
occasional periods of instability. We do most of our big changes in side
branches and only merge them into the development branch when they are clean.
Now that you've cloned the repository and optionally selected the branch you
want to work on, your local source tree may later be synced up with the
development source by using the git command::
@ -59,22 +68,33 @@ development source by using the git command::
The git system remembers the repository that it was cloned from, so you don't
need to re-enter it when you pull.
Finally, configuration files are built by the extra step::
To build the `configure` script and hash files you need to run the
following::
% sh autoconf.sh
% cd ..
The source is then compiled as appropriate for your system. See the specific
build instructions below for your operation system for what to do next.
You will need autoconf and gperf installed in order for the script to work.
If you get errors such as::
This is not need for the released `tar/zip` files since they already contain
these files. You only need to run this once after cloning. If you are missing
``autoconf`` or ``gperf`` then the script will fail::
Autoconf in root...
autoconf.sh: 10: autoconf: not found
Precompiling lexor_keyword.gperf
autoconf.sh: 13: gperf: not found.
You will need to install download and install the autoconf and gperf tools.
You will need to install the ``autoconf`` and ``gperf`` tools before you can
continue.
The other way to get the source code is to download a released `tar/zip` file::
% tar -xvzf v13_0.tar.gz
or
% unzip v13_0.zip
See the build instructions for your operation system below to know what to do
next. Though first determine if there are any extra configuration option you
may need.
Icarus Specific Configuration Options
-------------------------------------
@ -93,17 +113,18 @@ All programs or directories are tagged with this suffix. e.g.(iverilog-0.8,
vvp-0.8, etc.). The output of iverilog will reference the correct run time
files and directories. The run time will check that it is running a file with
a compatible version e.g.(you can not run a V0.9 file with the V0.8 run
time). ::
time).::
--with-valgrind
This option adds extra memory cleanup code and pool management code to allow
better memory leak checking when valgrind is available. This option is not
needed when checking for basic errors with valgrind. ::
needed when checking for basic errors with valgrind and should not be used if
you just intend to use ``iverilog`` as a simulator. ::
--enable-libvvp
The vvp progam is built as a small stub linked to a shared library,
The vvp program is built as a small stub linked to a shared library,
libvvp.so, that may be linked with other programs so that they can host
a vvp simulation. ::
@ -111,31 +132,196 @@ a vvp simulation. ::
PLI version 1 (the ACC and TF routines) were deprecated in IEEE 1364-2005.
These are supported in Icarus Verilog by the libveriuser library and cadpli
module. Starting with v13, these will only be built if this option is used.
module. Starting with V13, these will only be built if this option is used.
Compiling on Linux/Unix
-----------------------
(Note: You will need to install bison, flex, g++ and gcc) This is probably the
easiest case. Given that you have the source tree from the above instructions,
the compile and install is generally as simple as::
Note: For a gcc compile you will need to install ``bison``, ``flex``, ``g++``,
``gcc`` and preferably `bz2`, `zlib` and `readline` development packages. The
`bz2` and `zlib` development packages are required for the non-VCD waveform
dumpers and the `readline` development package is needed to enable better
terminal control in the ``vvp`` interactive mode.
% ./configure
% make
(su to root)
# make install
If you are only compiling one variant then you can compile directly in the
source tree. If you need multiple variants (optimized, debugging, multiple
compilers) then it is recommended you compile each in their own directory.
The "make install" typically needs to be done as root so that it can install
in directories such as "/usr/local/bin" etc. You can change where you want to
install by passing a prefix to the "configure" command::
For multiple variants create a directory for each of the variants you intend
to create and in each run the following steps, adjusting the options in the
configure stage to get the functionality you want. For a single build you can
either build it with the source or in a separate build directory.
% ./configure --prefix=/my/special/directory
The following is from a Ubuntu 22.04 machine using gcc (version 11.4)::
This will configure the source for eventual installation in the directory that
you specify. Note that "rpm" packages of binaries for Linux are typically
configured with "--prefix=/usr" per the Linux File System Standard.
% mkdir gcc
% cd gcc
or
% cd iverilog
Make sure you have the latest version of flex otherwise you will get an error
You can also use ``clang/clang++``. I usual build optimized version for
normal use and reserve debugging options for a valgrind or a separate
debugging build. Make sure you have `sudo` permission if you are using a
system prefix area, otherwise you need to use some place you have
permission to install (e.g. ~/).::
% env CFLAGS=-O2 CXXFLAGS=-O2 LDFLAGS=-s CC=gcc CXX=g++ ../iverilog/configure --enable-suffix=-gcc --prefix=/usr/local
This will generate the following (with some inline comments)::
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking for gcc... gcc
checking whether the C compiler works... yes
...
checking for gperf... gperf # required for git builds
checking for man... man # you likely want manual pages
checking for ps2pdf... ps2pdf
checking for groff... groff
checking for git... git # required for git builds
checking for flex... flex # required
checking for bison... bison # required
...
checking for tputs in -ltermcap... yes
checking for readline in -lreadline... yes
checking for add_history in -lreadline... yes
checking for readline/readline.h... yes
checking for readline/history.h... yes # you likely want this
...
checking for pthread_create in -lpthread... yes
checking for gzwrite in -lz... yes
checking for gzwrite in -lz... (cached) yes
checking for BZ2_bzdopen in -lbz2... yes
checking for BZ2_bzdopen in -lbz2... (cached) yes # you want these for fst dumping
...
<Create all the parameterized Makefile and header files>
Usually if ``configure`` fails there is some required dependency missing. I
usually review all the output to make sure it makes sense (e.g. I requested
``gcc`` and that's what is being used, other things match my expectation). If
all the waveform dumpers are not enabled there could be a few test failures.
Next we need to compile the code. Note: make sure you are using GNU make.
It may be named gmake (e.g. GhostBSD)::
% make check >& make.log
This is for a tcsh/csh shell. Bash/fish/zsh use ``&>`` instead of ``>&``.
Once this has completed check the make.log for any errors. There should not
be any! I also check for warnings. There are often some related to the
output from bison. For example::
From: ./parse.cc
parse.cc:9462:18: warning: missing initializer for member vlltype::lexical_pos [-Wmissing-field-initializers]
9462 | = { 1, 1, 1, 1 }
| ^
parse.cc:9462:18: warning: missing initializer for member vlltype::text [-Wmissing-field-initializers]
and::
From: ./vvp/parse.cc
parse.cc:3242: warning: suspicious sequence in the output: m4_type [-Wother]
parse.cc:3248: warning: suspicious sequence in the output: m4_type [-Wother]
Are common, but benign warnings. Different compilers or compiler versions may
have other warnings.
The expected last few lines of the make.log file and these indicate everything
should be working as expected are::
...
driver/iverilog -B. -BMvpi -BPivlpp -tcheck -ocheck.vvp ../iverilog/examples/hello.vl
vvp/vvp -M- -M./vpi ./check.vvp | grep 'Hello, World'
Hello, World
If everything is good to this point and you are installing into a system
prefix; install using ``sudo`` as shown below. If you are installing into a
personal location skip the ``sudo``::
% sudo make install
Now you should verify the regression test suite is working as expected::
% cd ../iverilog/ivtest
% ./vvp_reg.pl --suffix=-gcc
This is the original test script and should give no failures::
Running compiler/VVP tests for Icarus Verilog version: 13, suffix: -gcc.
----------------------------------------------------------------------------
macro_with_args: Passed.
mcl1: Passed.
pr622: Passed.
pr639: Passed.
...
ssetclr2: Passed.
ssetclr3: Passed.
synth_if_no_else: Passed.
ufuncsynth1: Passed.
============================================================================
Test results:
Total=3018, Passed=3013, Failed=0, Not Implemented=2, Expected Fail=3
Next run the new test script::
% ./vvp_reg.py --suffix=-gcc
This should also give no failures::
Running compiler/VVP tests for Icarus Verilog version: 13, suffix: -gcc
Using list(s): regress-vvp.list
----------------------------------------------------------------------------
always4A: Passed - CE.
always4B: Passed - CE.
analog1: Not Implemented.
analog2: Not Implemented.
...
vvp_quiet_mode: Passed.
warn_opt_sys_tf: Passed - EF.
wreal: Passed.
writemem-invalid: Passed - EF.
============================================================================
Test results: Ran 284, Failed 0.
Finally you can check that the VPI is working properly using::
% ./vpi_reg.pl --suffix=-gcc
The output for this should have no failures::
Running VPI tests for Icarus Verilog version: 13, suffix: -gcc.
----------------------------------------------------------------------------
br_gh59: Passed.
br_gh73a: Passed.
br_gh73b: Passed.
br_gh117: Passed.
...
value_change_cb2: Passed.
value_change_cb3: Passed.
value_change_cb4: Passed.
vpi_control: Passed.
============================================================================
Test results: Total=77, Passed=77, Failed=0, Not Implemented=0
You can uninstall everything using the following. If needed skip the ``sudo``
as described in the install description above.::
% sudo make uninstall
You can cleanup the compile directory using::
% make clean
or
% make distclean
The first just cleans up just the compiled files, etc. The later cleans up
the compiled file along with all the files generated in the ``configure``
phase.
Note that "rpm" packages of binaries for Linux are typically configured with
"--prefix=/usr" per the Linux File System Standard.
Make sure you have a recent version of flex otherwise you will get an error
when parsing lexor.lex.
Compiling on Macintosh OS X
@ -160,7 +346,13 @@ install icarus-verilog".
Cross-Compiling for Windows
---------------------------
These are instructions for building Icarus Verilog binaries for
The `Cygwin` and `MSYS2` environments can compile Icarus Verilog as described
above for `Linux/Unix`. There is a `MSYS2` build recipe which can be found in
the `msys2/` directory. The accompanying README file provides further details.
`MSYS2` is typically preferred over `Cygwin` since ``GTKWave`` and Icarus
Verilog are both provided as pre-compiled packages.
What follows are older instructions for building Icarus Verilog binaries for
Windows using mingw cross compiler tools on Linux.
To start with, you need the mingw64-cross-* packages for your linux
@ -185,9 +377,3 @@ The configure generated the cross compiler flags, but there are a few
bits that need to be compiled with the native compiler. (version.exe
for example is used by the build process but is not installed.) The
configure script should have gotten all that right.
Compiling for Windows using MSYS2
---------------------------------
There is a MSYS2 build recipe which you can find under `msys2/` in the
repository. The accompanying README file provides further details.