coq-vst Flocq version conflict
vzaliva opened this issue · comments
coq-vst package version 2.6 depends on both coq-compcert and coq-flocq packages.
However coq-compcert includes its own copy of Flocq library which I think leads to the following error:
$ coqtop
Welcome to Coq 8.11.2 (December 2020)
Coq < From compcert Require Export Coqlib Integers Floats AST Ctypes Cop Clight.
Toplevel input, characters 0-74:
> From compcert Require Export Coqlib Integers Floats AST Ctypes Cop Clight.
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Error:
Compiled library compcert.lib.Integers (in file /home/lord/.opam/asn1/lib/coq/user-contrib/compcert/lib/Integers.vo) makes inconsistent assumptions over library Flocq.Core.Zaux
My understanding is that you should favor the platform versions of these libraries to have everything work smoothly together. I'm not sure they exist for 8.11 though (you will need to look by yourself). Otherwise, a very scripted way of installing them together is documented for 8.12 at https://github.com/coq/platform/tree/v8.12 and for 8.13 at https://github.com/coq/platform/tree/v8.13.
@vzaliva : VST 2.6 depends on Compcert version 3.7~coq-platform or a variant of it. This variant does not include Flocq, but uses the opam supplied Flocq. I don't understand how you can install via opam VST 2.6 and CompCert 3.7 such that CompCert has its own Flocq. Can you please send a copy of opam list?
$ opam list
# Packages matching: installed
# Name # Installed # Synopsis
base-bigarray base
base-threads base
base-unix base
conf-findutils 1 Virtual package relying on findutils
conf-g++ 1.0 Virtual package relying on the g++ compiler (for C++)
conf-m4 1 Virtual package relying on m4
coq 8.11.2 Formal proof management system
coq-compcert dev The CompCert C compiler.
coq-ext-lib dev a library of Coq definitions, theorems, and tactics
coq-flocq 3.3.1 A formalization of floating-point arithmetic for the C
coq-menhirlib 20201201 A support library for verified Coq parsers produced by
coq-struct-tact dev Coq library of "structural tactics" and utility lemmas
dune 2.7.1 Fast, portable, and opinionated build system
menhir 20201201 An LR(1) parser generator
menhirLib 20201201 Runtime support library for parsers generated by Menhi
menhirSdk 20201201 Compile-time library for auxiliary tools related to Me
num 1.4 The legacy Num library for arbitrary-precision integer
ocaml 4.11.1 The OCaml compiler (virtual package)
ocaml-config 1 OCaml Switch Configuration
ocaml-variants 4.11.1+flambda Official release 4.11.1, with flambda activated
ocamlfind 1.8.1 A library manager for OCaml
I might added some confusion because of dev repository I have added.
OK, so you didn't install VST via opam. You should. Then opam will tell you that you need a different variant of the compcert package, namely coq-compcert.3.7~coq-platform. VST 2.6 either works with an opam supplied CompCert and Flocq or with the CompCert and Flocq delivered with VST but not with an external CompCert with integrated Flocq.
One specific problem here is likely that the dev version of the CompCert package is incompatible with many parts of the released ecosystem. In fact, this dev package hasn't been updated since March 2020 (i.e., well before coq-vst.2.6) and seemingly uses the bundled Flocq, so intuitively all sorts of issues could be present.
I see, so someone needs to maintain the dev versions as well. Luckily most of the platform patches found its way into CompCert master, so that only a few configure flags are needed rather than a lot of patches.
I plan to point the master branch of the coq platform to the coq dev repo in the near future. Such issues should be found and fixed this way.
released opam repo now OK wrt. this issue.