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conan install llvm-core/11.0.0@ --build=llvm-core --profile:host=/Users/jenkins/w/BuildSingleReference/13481/fcedd303-57fd-48d1-801c-54aa3dffb13e/profile_host.txt --profile:build=default
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Configuration (profile_host):
[settings]
arch=armv8
build_type=Debug
compiler=apple-clang
compiler.libcxx=libc++
compiler.version=12.0
os=Macos
[options]
llvm-core:shared=False
[build_requires]
[env]

Configuration (profile_build):
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=apple-clang
compiler.libcxx=libc++
compiler.version=12.0
os=Macos
os_build=Macos
[options]
[build_requires]
[env]

llvm-core/11.0.0: Forced build from source
Installing package: llvm-core/11.0.0
Requirements
    libiconv/1.16 from 'conan-center' - Cache
    libxml2/2.9.10 from 'conan-center' - Cache
    llvm-core/11.0.0 from local cache - Cache
    zlib/1.2.11 from 'conan-center' - Cache
Packages
    libiconv/1.16:baf78352c82543f997ec32332829b6fa30714eaa - Download
    libxml2/2.9.10:82ff995a29cd83bdb92c8731e86d609b02615546 - Missing
    llvm-core/11.0.0:1fbd1145c5421595b18bf45ce67ef7de357e9ca8 - Build
    zlib/1.2.11:baf78352c82543f997ec32332829b6fa30714eaa - Download

Cross-build from 'Macos:x86_64' to 'Macos:armv8'
Installing (downloading, building) binaries...

ERROR: Missing binary: libxml2/2.9.10:82ff995a29cd83bdb92c8731e86d609b02615546
libxml2/2.9.10: WARN: Can't find a 'libxml2/2.9.10' package for the specified settings, options and dependencies:
- Settings: arch=armv8, build_type=Debug, compiler=apple-clang, compiler.version=12.0, os=Macos
- Options: c14n=True, catalog=True, docbook=True, fPIC=True, ftp=True, html=True, http=True, iconv=True, icu=False, include_utils=True, iso8859x=True, legacy=True, lzma=False, mem-debug=False, output=True, pattern=True, push=True, python=False, reader=True, regexps=True, run-debug=False, sax1=True, schemas=True, schematron=True, shared=False, threads=True, tree=True, valid=True, writer=True, xinclude=True, xpath=True, xptr=True, zlib=True, libiconv:fPIC=True, libiconv:shared=False, zlib:fPIC=True, zlib:minizip=deprecated, zlib:shared=False
- Dependencies: zlib/1.2.11, libiconv/1.16
- Requirements: libiconv/1.Y.Z, zlib/1.Y.Z
- Package ID: 82ff995a29cd83bdb92c8731e86d609b02615546

ERROR: Missing prebuilt package for 'libxml2/2.9.10'
Try to build from sources with '--build=libxml2'
Use 'conan search <reference> --table table.html'
Or read 'http://docs.conan.io/en/latest/faq/troubleshooting.html#error-missing-prebuilt-package'