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conan install libtool/2.4.6@ --build=libtool --profile:host=/Users/jenkins/w/BuildSingleReference/14009/4d0dc729-c448-42e0-b470-0a67fe6a104b/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]
libtool: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]

libtool/2.4.6: Forced build from source
Installing package: libtool/2.4.6
Requirements
    autoconf/2.71 from 'conan-center' - Cache
    automake/1.16.3 from 'conan-center' - Cache
    libtool/2.4.6 from local cache - Cache
    m4/1.4.18 from 'conan-center' - Cache
Packages
    autoconf/2.71:cc471ed355602ffa7007968c83aa4e7e648a38b5 - Download
    automake/1.16.3:3c28ba69276b46fd46e9c2060ba991d725ccab43 - Download
    libtool/2.4.6:6054e10e20b4ff5344a44c6381849a97da403077 - Build
    m4/1.4.18:cb188579dd91605256b76b89243f76e7b4276240 - Missing
Build requirements
    gnu-config/cci.20201022 from 'conan-center' - Cache
Build requirements packages
    gnu-config/cci.20201022:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 - Download

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

ERROR: Missing binary: m4/1.4.18:cb188579dd91605256b76b89243f76e7b4276240
m4/1.4.18: WARN: Can't find a 'm4/1.4.18' package for the specified settings, options and dependencies:
- Settings: arch=armv8, build_type=Debug, compiler=apple-clang, compiler.libcxx=libc++, compiler.version=12.0, os=Macos
- Options: 
- Dependencies: 
- Requirements: 
- Package ID: cb188579dd91605256b76b89243f76e7b4276240

ERROR: Missing prebuilt package for 'm4/1.4.18'
Try to build from sources with '--build=m4'
Use 'conan search <reference> --table table.html'
Or read 'http://docs.conan.io/en/latest/faq/troubleshooting.html#error-missing-prebuilt-package'