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conan install c-client/2007f@ --build=c-client --profile=/home/conan/w/BuildSingleReference/73394/a7e81c87-aa6c-458d-928a-57ca36cf8e7a/profile.txt
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Configuration:
[settings]
arch=x86_64
build_type=Debug
compiler=gcc
compiler.libcxx=libstdc++11
compiler.version=5
os=Linux
[options]
[build_requires]
[env]

c-client/2007f: Forced build from source
Installing package: c-client/2007f
Requirements
    c-client/2007f from local cache - Cache
    openssl/1.1.1m from 'conan-center' - Cache
Packages
    c-client/2007f:f383c8a33369fa75f47d022556c8fdd1b6eaec12 - Build
    openssl/1.1.1m:b1b85bfdc2206d81b3ed6a49e78498182bb98ef3 - Cache

Installing (downloading, building) binaries...
openssl/1.1.1m: Already installed!
[HOOK - conan-center.py] post_package_info(): [CMAKE FILE NOT IN BUILD FOLDERS (KB-H019)] OK
[HOOK - conan-center.py] post_package_info(): [LIBRARY DOES NOT EXIST (KB-H054)] OK
c-client/2007f: Copying sources to build folder
c-client/2007f: Building your package in /home/conan/w/BuildSingleReference/.conan/data/c-client/2007f/_/_/build/f383c8a33369fa75f47d022556c8fdd1b6eaec12
c-client/2007f: Generator txt created conanbuildinfo.txt
c-client/2007f: Aggregating env generators
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK. 'fPIC' option found and apparently well managed
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK
c-client/2007f: Calling build()

----Running------
> make slx 'IP=6' '-j1'
-----------------
make[1]: Entering directory '/home/conan/w/BuildSingleReference/.conan/data/c-client/2007f/_/_/build/f383c8a33369fa75f47d022556c8fdd1b6eaec12'
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Building in full compliance with RFC 3501 security
+ requirements:
++ TLS/SSL encryption is supported
++ Unencrypted plaintext passwords are prohibited
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
make[1]: Leaving directory '/home/conan/w/BuildSingleReference/.conan/data/c-client/2007f/_/_/build/f383c8a33369fa75f47d022556c8fdd1b6eaec12'
Applying an process to sources...
tools/an "ln -s" src/c-client c-client
tools/an "ln -s" src/ansilib c-client
tools/an "ln -s" src/charset c-client
tools/an "ln -s" src/osdep/unix c-client
tools/an "ln -s" src/mtest mtest
tools/an "ln -s" src/ipopd ipopd
tools/an "ln -s" src/imapd imapd
tools/an "ln -s" src/mailutil mailutil
tools/an "ln -s" src/mlock mlock
tools/an "ln -s" src/dmail dmail
tools/an "ln -s" src/tmail tmail
ln -s tools/an .
make build EXTRACFLAGS='' EXTRALDFLAGS='' EXTRADRIVERS='mbox' EXTRAAUTHENTICATORS='' PASSWDTYPE=std SSLTYPE=nopwd IP=6 EXTRASPECIALS='' BUILDTYPE=slx
make[1]: Entering directory '/home/conan/w/BuildSingleReference/.conan/data/c-client/2007f/_/_/build/f383c8a33369fa75f47d022556c8fdd1b6eaec12'
Rebuilding c-client for slx...
cd c-client;make all CC=`cat CCTYPE` \
 CFLAGS="`cat CFLAGS`" `cat SPECIALS`
make[2]: Entering directory '/home/conan/w/BuildSingleReference/.conan/data/c-client/2007f/_/_/build/f383c8a33369fa75f47d022556c8fdd1b6eaec12/c-client'
You must specify what type of system
Makefile:184: recipe for target 'osdep.h' failed
make[2]: Leaving directory '/home/conan/w/BuildSingleReference/.conan/data/c-client/2007f/_/_/build/f383c8a33369fa75f47d022556c8fdd1b6eaec12/c-client'
Makefile:696: recipe for target 'rebuild' failed
make[1]: Leaving directory '/home/conan/w/BuildSingleReference/.conan/data/c-client/2007f/_/_/build/f383c8a33369fa75f47d022556c8fdd1b6eaec12'
Makefile:311: recipe for target 'slx' failed
c-client/2007f: 
cat: CCTYPE: No such file or directory
cat: CFLAGS: No such file or directory
cat: SPECIALS: No such file or directory
make[2]: *** [osdep.h] Error 1
make[1]: *** [rebuild] Error 2
make: *** [slx] Error 2
c-client/2007f: WARN: Build folder is dirty, removing it: /home/conan/w/BuildSingleReference/.conan/data/c-client/2007f/_/_/build/f383c8a33369fa75f47d022556c8fdd1b6eaec12
c-client/2007f: ERROR: Package 'f383c8a33369fa75f47d022556c8fdd1b6eaec12' build failed
c-client/2007f: WARN: Build folder /home/conan/w/BuildSingleReference/.conan/data/c-client/2007f/_/_/build/f383c8a33369fa75f47d022556c8fdd1b6eaec12
ERROR: c-client/2007f: Error in build() method, line 106
	self._build_unix()
while calling '_build_unix', line 97
	AutoToolsBuildEnvironment(self).make(target=target, args=args)
	ConanException: Error 2 while executing make slx 'IP=6' '-j1'