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conan install libcurl/7.71.1@ --profile=/home/conan/w/BuildSingleReference/1697/a554a126-2cab-411d-be60-a895145f98ab/profile.txt --build=libcurl
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Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Debug
compiler=gcc
compiler.libcxx=libstdc++11
compiler.version=10
os=Linux
os_build=Linux
[options]
libcurl:shared=True
[build_requires]
[env]

libcurl/7.71.1: Forced build from source
Installing package: libcurl/7.71.1
Requirements
    libcurl/7.71.1 from 'conan-upstream' - Cache
    openssl/1.1.1i from 'conan-center' - Cache
    zlib/1.2.11 from 'conan-center' - Cache
Packages
    libcurl/7.71.1:86b04dcdf5da395dbbaf69ead4778ee147255c6c - Build
    openssl/1.1.1i:75e99b627c196b65c439728670655ec3c366b334 - Missing
    zlib/1.2.11:75e99b627c196b65c439728670655ec3c366b334 - Download
Build requirements
    autoconf/2.69 from 'conan-center' - Cache
    automake/1.16.2 from 'conan-center' - Cache
    libtool/2.4.6 from 'conan-center' - Cache
    m4/1.4.18 from 'conan-center' - Cache
    pkgconf/1.7.3 from 'conan-center' - Cache
Build requirements packages
    autoconf/2.69:cb054d0b3e1ca595dc66bc2339d40f1f8f04ab31 - Download
    automake/1.16.2:258f6f05ca54813b3d7180161753df7f9ccf7e1d - Download
    libtool/2.4.6:3df38a426f196a722a8929be9e98049b1403b106 - Missing
    m4/1.4.18:bd57d5c75f1acb12be0420dd8052398d7a88dbf6 - Download
    pkgconf/1.7.3:75e99b627c196b65c439728670655ec3c366b334 - Missing

Installing (downloading, building) binaries...

ERROR: Missing binary: libtool/2.4.6:3df38a426f196a722a8929be9e98049b1403b106
ERROR: Missing binary: openssl/1.1.1i:75e99b627c196b65c439728670655ec3c366b334
ERROR: Missing binary: pkgconf/1.7.3:75e99b627c196b65c439728670655ec3c366b334
openssl/1.1.1i: WARN: Can't find a 'openssl/1.1.1i' package for the specified settings, options and dependencies:
- Settings: arch=x86_64, build_type=Debug, compiler=gcc, compiler.version=10, os=Linux
- Options: 386=False, fPIC=True, no_aria=False, no_asm=False, no_async=False, no_bf=False, no_blake2=False, no_camellia=False, no_cast=False, no_chacha=False, no_cms=False, no_comp=False, no_ct=False, no_deprecated=False, no_des=False, no_dgram=False, no_dh=False, no_dsa=False, no_dso=False, no_engine=False, no_filenames=False, no_gost=False, no_hmac=False, no_idea=False, no_md4=False, no_md5=False, no_mdc2=False, no_ocsp=False, no_pinshared=False, no_rc2=False, no_rmd160=False, no_rsa=False, no_sha=False, no_sm2=False, no_sm3=False, no_sm4=False, no_srp=False, no_srtp=False, no_sse2=False, no_ssl=False, no_threads=False, no_ts=False, no_whirlpool=False, openssldir=None, shared=False
- Dependencies: 
- Requirements: 
- Package ID: 75e99b627c196b65c439728670655ec3c366b334

ERROR: Missing prebuilt package for 'libtool/2.4.6', 'openssl/1.1.1i', 'pkgconf/1.7.3'
Try to build from sources with '--build=libtool --build=openssl --build=pkgconf'
Use 'conan search <reference> --table table.html'
Or read 'http://docs.conan.io/en/latest/faq/troubleshooting.html#error-missing-prebuilt-package'