Bug#990537: llvm-11: llvm-mt should be built with libxml support

[Krzysztof Aleksander Pyrkosz]

Package: llvm-11
Version: 1:11.0.1-2
Severity: normal
X-Debbugs-Cc: krzpyrkosz at gmail.com

Dear Maintainer,

llvm manifest tool (llvm-mt) is not configured to use libxml2, which
is an essential dependency of this program. 

$ llvm-mt /manifest foobar.xml 
llvm-mt: error: no libxml2

The problem is very simple to resolve, libxml2-dev needs to be installed
at the time of CMake configure phase. I've tried rebuilding llvm from
source with the xml library present, the problem is gone.

-- System Information:
Debian Release: 11.0
  APT prefers testing-security
  APT policy: (500, 'testing-security'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 5.13.0casefold (SMP w/4 CPU threads)
Kernel taint flags: TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages llvm-11 depends on:
ii  libc6            2.31-12
ii  libgcc-s1        10.2.1-6
ii  libllvm11        1:11.0.1-2
ii  libpfm4          4.11.1+git32-gd0b85fb-1
ii  libstdc++6       10.2.1-6
ii  libtinfo6        6.2+20201114-2
ii  libz3-4          4.8.10-1
ii  llvm-11-runtime  1:11.0.1-2
ii  zlib1g           1:1.2.11.dfsg-2

Versions of packages llvm-11 recommends:
ii  llvm-11-dev  1:11.0.1-2

Versions of packages llvm-11 suggests:
pn  llvm-11-doc  <none>

-- no debconf information