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conan install libltc/1.3.1@ --build=libltc --profile=/home/conan/w/BuildSingleReference/17598/8effae24-7908-42fd-82d0-f547dd132fca/profile.txt
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Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Debug
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=4.9
os=Linux
os_build=Linux
[options]
libltc:shared=True
[build_requires]
[env]

libltc/1.3.1: Forced build from source
Installing package: libltc/1.3.1
Requirements
    libltc/1.3.1 from local cache - Cache
Packages
    libltc/1.3.1:4c1e28fd5a4bc95f5d58d65e681471e51dbc3d1a - Build

Installing (downloading, building) binaries...
[HOOK - conan-center.py] pre_source(): [IMMUTABLE SOURCES (KB-H010)] OK
libltc/1.3.1: Configuring sources in /home/conan/w/BuildSingleReference/.conan/data/libltc/1.3.1/_/_/source

[HOOK - conan-center.py] post_source(): [LIBCXX MANAGEMENT (KB-H011)] OK
libltc/1.3.1: WARN: Build folder is dirty, removing it: /home/conan/w/BuildSingleReference/.conan/data/libltc/1.3.1/_/_/build/4c1e28fd5a4bc95f5d58d65e681471e51dbc3d1a
libltc/1.3.1: WARN: Trying to remove corrupted source folder
libltc/1.3.1: WARN: This can take a while for big packages
[HOOK - conan-center.py] post_source(): ERROR: [CPPSTD MANAGEMENT (KB-H022)] Can't detect C++ source files but recipe does not remove 'self.settings.compiler.cppstd' (https://github.com/conan-io/conan-center-index/blob/master/docs/error_knowledge_base.md#KB-H022) 
ERROR: [HOOK - conan-center.py] post_source(): Some checks failed running the hook, check the output