* Package:    sys-cluster/csync2-2.0
 * Repository: gentoo
 * Maintainer: cluster@gentoo.org
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux ssl userland_GNU
 * FEATURES:   preserve-libs sandbox userpriv usersandbox
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
/var/tmp/portage/sys-cluster/csync2-2.0/work/csync2-2.0/missing: Unknown `--is-lightweight' option
Try `/var/tmp/portage/sys-cluster/csync2-2.0/work/csync2-2.0/missing --help' for more information
configure: WARNING: 'missing' script is too old or missing
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking for x86_64-pc-linux-gnu-gcc... x86_64-pc-linux-gnu-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 x86_64-pc-linux-gnu-gcc accepts -g... yes
checking for x86_64-pc-linux-gnu-gcc option to accept ISO C89... none needed
checking whether x86_64-pc-linux-gnu-gcc understands -c and -o together... yes
checking for style of include used by make... GNU
checking dependency style of x86_64-pc-linux-gnu-gcc... none
checking for bison... bison -y
checking for flex... flex
checking lex output file root... lex.yy
checking lex library... -lfl
checking whether yytext is a pointer... yes
checking for pdflatex... pdflatex
checking for fchmod... yes
checking for setmode... no
checking for open64... yes
checking for mkstemp64... yes
checking for secure mkstemp... yes
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking for rs_sig_file in -lrsync... yes
checking for x86_64-pc-linux-gnu-pkg-config... /usr/bin/x86_64-pc-linux-gnu-pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for LIBGNUTLS... yes
configure: error: No database backend configured. Please enable either sqlite, sqlite3, mysql or postgres.

!!! Please attach the following file when seeking support:
!!! /var/tmp/portage/sys-cluster/csync2-2.0/work/csync2-2.0/config.log
 * ERROR: sys-cluster/csync2-2.0::gentoo failed (configure phase):
 *   econf failed
 * 
 * Call stack:
 *               ebuild.sh, line   93:  Called src_configure
 *             environment, line 1953:  Called econf '--docdir=/usr/share/doc/csync2-2.0' '--localstatedir=/var' '--sysconfdir=/etc/csync2' '--disable-sqlite3' '--enable-gnutls'
 *        phase-helpers.sh, line  662:  Called __helpers_die 'econf failed'
 *   isolated-functions.sh, line  117:  Called die
 * The specific snippet of code:
 *   		die "$@"
 * 
 * If you need support, post the output of `emerge --info '=sys-cluster/csync2-2.0::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=sys-cluster/csync2-2.0::gentoo'`.
 * The complete build log is located at '/var/log/log/build/sys-cluster/csync2-2.0:20150803-094908.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/sys-cluster/csync2-2.0/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-cluster/csync2-2.0/temp/environment'.
 * Working directory: '/var/tmp/portage/sys-cluster/csync2-2.0/work/csync2-2.0'
 * S: '/var/tmp/portage/sys-cluster/csync2-2.0/work/csync2-2.0'