opam install eigen fails on freebsd

[devosalain]

Error:

HOST:x: /home/x >opam install eigen   
Constructing initial basis...
Number of 0-1 knapsack inequalities = 11114
Constructing conflict graph...
Conflict graph has 1824 + 497 = 2321 vertices
The following actions will be performed:
  ∗ install eigen 0.3.2
<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
⬇ retrieved eigen.0.3.2  (cached)
[ERROR] The compilation of eigen.0.3.2 failed at "dune build -p eigen -j 7".

#=== ERROR while compiling eigen.0.3.2 ========================================#
# context     2.1.2 | freebsd/x86_64 | ocaml-base-compiler.4.11.2 | https://opam.ocaml.org#04b12199
# path        /usr/home/x/.opam/4.11.2/.opam-switch/build/eigen.0.3.2
# command     /usr/home/x/.opam/4.11.2/bin/dune build -p eigen -j 7
# exit-code   1
# env-file    /usr/home/x/.opam/log/eigen-15719-29ced3.env
# output-file /usr/home/x/.opam/log/eigen-15719-29ced3.out
### output ###
# compiling c program:                                                                                                                                                      
# [...]
#  |   #endif
#  | 
#  | const char *s0 = "BEGIN-0-" PLATFORM_NAME "-END";
# run: gcc -O2 -fno-strict-aliasing -fwrapv -fPIC -I /usr/home/x/.opam/4.11.2/lib/ocaml -o /tmp/build_7ef769_dune/ocaml-configurator39fff0/c-test-0/test.o -c /tmp/build_7ef769_dune/ocaml-configurator39fff0/c-test-0/test.c -lm
# -> process exited with code 1
# -> stdout:
# -> stderr:
#  | /tmp/build_7ef769_dune/ocaml-configurator39fff0/c-test-0/test.c:21:29: error: expected ',' or ';' before 'PLATFORM_NAME'
#  |    21 | const char *s0 = "BEGIN-0-" PLATFORM_NAME "-END";
#  |       |                             ^~~~~~~~~~~~~
# Error: failed to compile program
<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
┌─ The following actions failed
│ λ build eigen 0.3.2
└─ 
╶─ No changes have been performed
HOST:x: /home/x >

[mseri]

Thanks for the report. For the moment you can work around it with opam pin eigen.0.3.0. This is however a bug in dune-configurator, could you open an issue on dune’s repository?

[devosalain]

I'm currently installing compiling additional libraries on FreeBSD OS. I'll inform if "opam eigen" works later.

[mseri]

Actually, I take it back, I had a deeper look and it is a bug here. I am missing the unkown platform. I'll make a patch and release the new version. Thanks for the report.

[devosalain]

After installing OS package "eigen-3.3.9_1" , opam fails with the same error.

[mseri]

Can you try opam install eigen.0.3.0 and opam pin eigen git+https://github.com/owlbarn/eigen? Those versions should be fixed

[devosalain]

opam install eigen.0.3.0 worked. Followed by opam install owl.