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conan install libpqxx/7.3.0@ --profile=/home/conan/w/BuildSingleReference/1602/af73dfbb-3739-41e3-9cf7-ba818ccebdfa/profile.txt --build=libpqxx
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Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=clang
compiler.libcxx=libstdc++
compiler.version=10
os=Linux
os_build=Linux
[options]
libpqxx:shared=False
[build_requires]
[env]

libpqxx/7.3.0: Forced build from source
Installing package: libpqxx/7.3.0
Requirements
    libpq/12.2 from 'conan-center' - Cache
    libpqxx/7.3.0 from 'conan-upstream' - Cache
    zlib/1.2.11 from 'conan-center' - Cache
Packages
    libpq/12.2:22cbc34cecac9ec5dde41935ae587e7384c09f1c - Missing
    libpqxx/7.3.0:f37f7db658b21e5c93ba5fe06d5b8b4d60bc6ed2 - Build
    zlib/1.2.11:2b1e5ff9df96aaf5924c273e1368c632fcb32dd2 - Download

Installing (downloading, building) binaries...

ERROR: Missing binary: libpq/12.2:22cbc34cecac9ec5dde41935ae587e7384c09f1c
libpq/12.2: WARN: Can't find a 'libpq/12.2' package for the specified settings, options and dependencies:
- Settings: arch=x86_64, build_type=Release, compiler=clang, compiler.version=10, os=Linux
- Options: disable_rpath=False, fPIC=True, shared=False, with_openssl=False, with_zlib=True, zlib:fPIC=True, zlib:minizip=False, zlib:shared=False
- Dependencies: zlib/1.2.11
- Requirements: zlib/1.Y.Z
- Package ID: 22cbc34cecac9ec5dde41935ae587e7384c09f1c

ERROR: Missing prebuilt package for 'libpq/12.2'
Try to build from sources with '--build=libpq'
Use 'conan search <reference> --table table.html'
Or read 'http://docs.conan.io/en/latest/faq/troubleshooting.html#error-missing-prebuilt-package'