/Users/jenkins/w/cci_PR-4431/.conan/data/libbacktrace/1.0/_/_/build/af96383df8ed9748d2eed48fb04099c5914a718f/missing: Unknown `--is-lightweight' option
Try `/Users/jenkins/w/cci_PR-4431/.conan/data/libbacktrace/1.0/_/_/build/af96383df8ed9748d2eed48fb04099c5914a718f/missing --help' for more information
configure: WARNING: 'missing' script is too old or missing
/Applications/Xcode-9.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: .libs/libbacktrace.a(atomic.o) has no symbols
/Applications/Xcode-9.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: .libs/libbacktrace.a(atomic.o) has no symbols
/Applications/Xcode-9.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: /Users/jenkins/w/cci_PR-4431/.conan/data/libbacktrace/1.0/_/_/package/af96383df8ed9748d2eed48fb04099c5914a718f/lib/libbacktrace.a(atomic.o) has no symbols
[HOOK - conan-center.py] post_package(): ERROR: [LIBTOOL FILES PRESENCE (KB-H018)] Libtool files found (*.la). Do not package *.la files but library files (.a)  (https://github.com/conan-io/conan-center-index/blob/master/docs/error_knowledge_base.md#KB-H018) 
[HOOK - conan-center.py] post_package(): ERROR: [LIBTOOL FILES PRESENCE (KB-H018)] Found files: ./lib/libbacktrace.la (https://github.com/conan-io/conan-center-index/blob/master/docs/error_knowledge_base.md#KB-H018) 
ERROR: [HOOK - conan-center.py] post_package(): Some checks failed running the hook, check the output