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conan install libtommath/1.2.0@ --profile=/home/conan/w/BuildSingleReference/1196/3218b77d-b8e3-4de9-bc9f-90d241ffd424/profile.txt --build=libtommath
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Auto detecting your dev setup to initialize the default profile (/home/conan/w/BuildSingleReference/.conan/profiles/default)
CC and CXX: clang, clang++ 
Found clang 10.0
clang>=8, using the major as version
Default settings
	os=Linux
	os_build=Linux
	arch=x86_64
	arch_build=x86_64
	compiler=clang
	compiler.version=10
	compiler.libcxx=libstdc++
	build_type=Release
*** You can change them in /home/conan/w/BuildSingleReference/.conan/profiles/default ***
*** Or override with -s compiler='other' -s ...s***


Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Debug
compiler=clang
compiler.libcxx=libstdc++
compiler.version=10
os=Linux
os_build=Linux
[options]
libtommath:shared=True
[build_requires]
[env]

libtommath/1.2.0: Forced build from source
libtool/2.4.6: Not found in local cache, looking in remotes...
libtool/2.4.6: Trying with 'conan-upstream'...
libtool/2.4.6: Trying with 'conan-center'...
Downloading conanmanifest.txt
Downloading conanfile.py
Downloading conan_export.tgz
libtool/2.4.6: Downloaded recipe revision a82e4a43064f050f788bc7444c03150a
automake/1.16.2: Not found in local cache, looking in remotes...
automake/1.16.2: Trying with 'conan-upstream'...
automake/1.16.2: Trying with 'conan-center'...
Downloading conanmanifest.txt
Downloading conanfile.py
Downloading conan_export.tgz
automake/1.16.2: Downloaded recipe revision 7a502965cc0e76ff790559446782b2ed
autoconf/2.69: Not found in local cache, looking in remotes...
autoconf/2.69: Trying with 'conan-upstream'...
autoconf/2.69: Trying with 'conan-center'...
Downloading conanmanifest.txt
Downloading conanfile.py
Downloading conan_export.tgz
autoconf/2.69: Downloaded recipe revision 5f628468454b2e62c9fc9d90538601cb
m4/1.4.18: Not found in local cache, looking in remotes...
m4/1.4.18: Trying with 'conan-upstream'...
m4/1.4.18: Trying with 'conan-center'...
Downloading conanmanifest.txt
Downloading conanfile.py
Downloading conan_export.tgz
m4/1.4.18: Downloaded recipe revision 5176ab3c1100ae7d083abc2a95f64d84
Installing package: libtommath/1.2.0
Requirements
    libtommath/1.2.0 from 'conan-upstream' - Cache
Packages
    libtommath/1.2.0:f9ef8d26d66d633c5de261aa8b143b247793ec76 - Build
Build requirements
    autoconf/2.69 from 'conan-center' - Downloaded
    automake/1.16.2 from 'conan-center' - Downloaded
    libtool/2.4.6 from 'conan-center' - Downloaded
    m4/1.4.18 from 'conan-center' - Downloaded
Build requirements packages
    autoconf/2.69:4db1be536558d833e52e862fd84d64d75c2b3656 - Download
    automake/1.16.2:258f6f05ca54813b3d7180161753df7f9ccf7e1d - Download
    libtool/2.4.6:99862aff33ecc6b40f05cc525b558780f5db8cac - Missing
    m4/1.4.18:227182a897cec2eb774e04227a2d618f056690f5 - Download

Installing (downloading, building) binaries...

ERROR: Missing binary: libtool/2.4.6:99862aff33ecc6b40f05cc525b558780f5db8cac
libtool/2.4.6: WARN: Can't find a 'libtool/2.4.6' package for the specified settings, options and dependencies:
- Settings: arch=x86_64, build_type=Debug, compiler=clang, compiler.version=10, os=Linux
- Options: fPIC=True, shared=False
- Dependencies: automake/1.16.2
- Requirements: automake/1.Y.Z
- Package ID: 99862aff33ecc6b40f05cc525b558780f5db8cac

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