Log data follows:
| DEBUG: Executing python function sysroot_cleansstate
| DEBUG: Python function sysroot_cleansstate finished
| DEBUG: SITE files ['endian-little', 'common-linux', 'common-glibc', 'bit-64', 'x86_64-linux', 'common']
| DEBUG: Executing shell function autotools_preconfigure
| DEBUG: Shell function autotools_preconfigure finished
| DEBUG: Executing python function autotools_copy_aclocals
| DEBUG: Python function autotools_copy_aclocals finished
| DEBUG: Executing shell function do_configure
| -- The CXX compiler identification is GNU 4.9.2
| -- The C compiler identification is GNU 4.9.2
| -- Check for working CXX compiler: /home/autoeye-1/yocto_bkc/yocto_build/build/tmp/sysroots/x86_64-linux/usr/bin/x86_64-poky-linux/x86_64-poky-linux-g++
| -- Check for working CXX compiler: /home/autoeye-1/yocto_bkc/yocto_build/build/tmp/sysroots/x86_64-linux/usr/bin/x86_64-poky-linux/x86_64-poky-linux-g++ -- works
| -- Detecting CXX compiler ABI info
| -- Detecting CXX compiler ABI info - done
| -- Check for working C compiler: /home/autoeye-1/yocto_bkc/yocto_build/build/tmp/sysroots/x86_64-linux/usr/bin/x86_64-poky-linux/x86_64-poky-linux-gcc
| -- Check for working C compiler: /home/autoeye-1/yocto_bkc/yocto_build/build/tmp/sysroots/x86_64-linux/usr/bin/x86_64-poky-linux/x86_64-poky-linux-gcc -- works
| -- Detecting C compiler ABI info
| -- Detecting C compiler ABI info - done
| -- multiarch triplet detected: x86_64-linux-gnu
| -- Looking for external programs
| -- Missing perl
| -- Found intltool-merge
| -- Found xsltproc
| -- Found xmllint
| CMake Error at CMakeLists.txt:195 (message):
|   Some external programs couldn't be found
|
|
| -- Configuring incomplete, errors occurred!
| See also "/home/autoeye-1/yocto_bkc/yocto_build/build/tmp/work/corei7-64-poky-linux/darktable/1.6.9-r0/build/CMakeFiles/CMakeOutput.log".
| WARNING: exit code 1 from a shell command.
| ERROR: Function failed: do_configure (log file is located at /home/autoeye-1/yocto_bkc/yocto_build/build/tmp/work/corei7-64-poky-linux/darktable/1.6.9-r0/temp/log.do_configure.13641)