$ opam install bap
The following actions will be performed:
  ∗ install bap-llvm       master [required by bap]
  ∗ install bap-x86        master [required by bap]
  ∗ install bap-arm        master [required by bap]
  ∗ install bap-primus-x86 master [required by bap]
  ∗ install bap            master
===== ∗ 5 =====
Do you want to continue? [Y/n] y
y

<><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[bap-llvm.master] synchronised from git+https://github.com/BinaryAnalysisPlatform/bap#master
[bap.master] synchronised from git+https://github.com/BinaryAnalysisPlatform/bap#master
[bap-arm.master] synchronised from git+https://github.com/BinaryAnalysisPlatform/bap#master
[bap-primus-x86.master] synchronised from git+https://github.com/BinaryAnalysisPlatform/bap#master
[bap-x86.master] synchronised from git+https://github.com/BinaryAnalysisPlatform/bap#master

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[ERROR] The compilation of bap-llvm failed at "/home/Jon/.opam/opam-init/hooks/sandbox.sh build ./configure --prefix=/home/Jon/.opam/4.07.1 --with-cxx=`which
        clang++` --with-llvm-version=10.0.0 --with-llvm-config=/usr/local/bin/llvm-config --enable-llvm".

#=== ERROR while compiling bap-llvm.master ====================================#
# context              2.0.4 | linux/x86_64 | ocaml-base-compiler.4.07.1 | git+https://github.com/BinaryAnalysisPlatform/opam-repository#testing
# path                 ~/.opam/4.07.1/.opam-switch/build/bap-llvm.master
# command              ~/.opam/opam-init/hooks/sandbox.sh build ./configure --prefix=/home/Jon/.opam/4.07.1 --with-cxx=`which clang++` --with-llvm-version=10.0.0 --with-llvm-config=/usr/local/bin/llvm-config --enable-llvm
# exit-code            1
# env-file             ~/.opam/log/bap-llvm-53379-aa4a43.env
# output-file          ~/.opam/log/bap-llvm-53379-aa4a43.out
### output ###
# [...]
# llvm-config: error: missing: /usr/local/lib/libLLVMWebAssemblyCodeGen.a
# llvm-config: error: missing: /usr/local/lib/libLLVMWebAssemblyDisassembler.a
# llvm-config: error: missing: /usr/local/lib/libLLVMXCoreInfo.a
# llvm-config: error: missing: /usr/local/lib/libLLVMXCoreDesc.a
# llvm-config: error: missing: /usr/local/lib/libLLVMXCoreCodeGen.a
# llvm-config: error: missing: /usr/local/lib/libLLVMXCoreDisassembler.a
# llvm-config: error: missing: /usr/local/lib/libLLVMDWARFLinker.a
# llvm-config: error: missing: /usr/local/lib/libLLVMFrontendOpenMP.a
# llvm-config: error: missing: /usr/local/lib/libLLVMOrcError.a
# E:   Failed to find llvm library, consider using --with-llvm-version
#      or --with-llvm-config command line options, to point me on a
#      correct version of LLVM.



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
┌─ The following actions failed
│ λ build bap-llvm master
└─
╶─ No changes have been performed

The packages you requested declare the following system dependencies. Please make sure they are installed before retrying:
    clang libncurses5-dev