[build2] Uninstall fails for old version 0.8.0 on macOS. How to proceed?

[Nikolaus Demmel]

Hi,

a while ago I installed build2 to try it. This was on macOS 10.13. More than a year later, and after having upgraded to the latest macSO 10.15, I recently had some linker issues with libraries in /usr/local/lib, like libsqlite3, which conflict with system libraries, e.g.:

dyld: Library not loaded: /usr/lib/libsqlite3.dylib
  Referenced from: /System/Library/Frameworks/CFNetwork.framework/Versions/A/CFNetwork
  Reason: Incompatible library version: CFNetwork requires version 9.0.0 or later, but libsqlite3.dylib provides version 0.0.0
22:51:50: The program has unexpectedly finished.

I assume libsqlite3 comes from the build2 install. Here is what `brew doctor` has to say about libraries (and also includes and pc files):

Unexpected dylibs:
  /usr/local/lib/libbpkg-0.8.dylib
  /usr/local/lib/libbutl-0.8.dylib
  /usr/local/lib/libodb-2.5.0-b.9.dylib
  /usr/local/lib/libodb-sqlite-2.5.0-b.9.dylib
  /usr/local/lib/libpkgconf-3.dylib
  /usr/local/lib/libsqlite3-1.dylib

It seems to be quite a lot of files (libraries, headers, pc, …) and I wanted to cleanly uninstall build2 from /usr/local/, so I tried with the script from the original build folder:

$ ls -la
total 6976
drwxr-xr-x   5 demmeln  staff      160 Jan 23  2019 .
drwxr-xr-x   3 demmeln  staff       96 Jan 23  2019 ..
-rwxr-xr-x   1 demmeln  staff    14695 Jan 23  2019 build2-install-0.8.0.sh
drwxr-xr-x  23 demmeln  staff      736 Jan 23  2019 build2-toolchain-0.8
-rw-r--r--   1 demmeln  staff  3552840 Jan 23  2019 build2-toolchain-0.8.0.tar.xz
$ ./build2-install-0.8.0.sh --uninstall

But unfortunately (probably due to the OS upgrade), the uninstall fails after longer compilation.

[…]
c++ build2-toolchain-0.8/bpkg-0.8.0/bpkg/cxx{pkg-unpack}
ar build2-toolchain-0.8/build2-0.8.0/build2/libue{b}
ld build2-toolchain-0.8/build2-0.8.0/build2/exe{b}
Undefined symbols for architecture x86_64:
  "std::__1::__match_any_but_newline<build2::test::script::regex::line_char>::__exec(std::__1::__state<build2::test::script::regex::line_char>&) const", referenced from:
      vtable for std::__1::__match_any_but_newline<build2::test::script::regex::line_char> in libb.u.a(runner.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ld build2-toolchain-0.8/bpkg-0.8.0/bpkg/exe{bpkg}
info: failed to update (for uninstall) build2-toolchain-0.8/dir{build2-0.8.0/}

What is the best way to uninstall all the files associated with build2? I tried downloading the latest version, but when I try to install, it warns that there is already an older version installed, and when I try to upgrade, it says its not possible from that old release. Trying to upgrade with the 0.9.0 installer results in a "unable to satisfy constraint (build2 >= 0.12.0) for package build2” error.

Any suggestions how to proceed. I could delete all files that `brew doctor` complains about, but I suspect that there are more associated with the install, and I’d like to remove all files from the build2 install if possible.

Kind regards,
Nikolaus