$ ./configure
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking how to run the C preprocessor... gcc -E
checking for a BSD-compatible install... /usr/bin/install -c
checking for ld... /usr/bin/ld
checking for ar... /usr/bin/ar
checking for ranlib... /usr/bin/ranlib
checking for autoconf... /usr/bin/autoconf
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for stdint.h... (cached) yes
checking ext2fs/ext2_fs.h usability... no
checking ext2fs/ext2_fs.h presence... no
checking for ext2fs/ext2_fs.h... no
checking sys/statfs.h usability... yes
checking sys/statfs.h presence... yes
checking for sys/statfs.h... yes
checking sys/xattr.h usability... yes
checking sys/xattr.h presence... yes
checking for sys/xattr.h... yes
checking sys/param.h usability... yes
checking sys/param.h presence... yes
checking for sys/param.h... yes
checking sys/extattr.h usability... no
checking sys/extattr.h presence... no
checking for sys/extattr.h... no
checking libutil.h usability... no
checking libutil.h presence... no
checking for libutil.h... no
checking for lgetxattr... yes
checking for lsetxattr... yes
checking for getxattr... yes
checking for setxattr... yes
checking for getattrlist... no
checking for setattrlist... no
checking for lchmod... no
checking for lchown... yes
checking for chflags... no
checking for statvfs... yes
checking for statfs... yes
checking for strmode... no
checking for struct statfs.f_fstypename... no
checking for struct statvfs.f_fstypename... no
checking for struct stat.st_flags... no
checking size of uid_t... 4
checking size of gid_t... 4
checking size of ino_t... 8
checking size of dev_t... 8
checking for acl_get_file in -lacl... no
checking for asprintf... yes
checking for xml2-config... /usr/bin/xml2-config
checking for libxml >= 2.6.11... 2.9.4
checking libxml/xmlwriter.h usability... yes
checking libxml/xmlwriter.h presence... yes
checking for libxml/xmlwriter.h... yes
checking openssl/evp.h usability... yes
checking openssl/evp.h presence... yes
checking for openssl/evp.h... yes
checking for OpenSSL_add_all_ciphers in -lcrypto... no
configure: error: Cannot build without libcrypto (OpenSSL)