Bug 346814

Originally reported here: https://forum.kde.org/viewtopic.php?f=19&t=125841#p333757

I get this errors when i try to compile on my debian sid :( 

```
cd build; cmake ..
[INFO] root/start
-- The C compiler identification is GNU 4.9.2
-- The CXX compiler identification is GNU 4.9.2
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
[INFO] root/add_subdirectory(src)
[INFO] src/start
[INFO] src/find_package Qt5
[INFO] src/include_directories
[INFO] src/add_executable
[INFO] src/target_link_libraries
[INFO] src/add_subdirectory(lib/kreenshoteditor)
[INFO] lib/kreenshoteditor/start
[DEBUG] kreenshoteditor_FORMS=ui/settings/preferencesdialog.ui;ui/settings/pageoutput.ui
[DEBUG] kreenshoteditor_FORMS_HEADERS=/home/mte90/Desktop/kde/kreenshot-editor/build/src/lib/kreenshoteditor/ui_preferencesdialog.h;/home/mte90/Desktop/kde/kreenshot-editor/build/src/lib/kreenshoteditor/ui_pageoutput.h
[DEBUG] LIB_SUFFIX=
[DEBUG] env var XDG_DATA_DIRS=/usr/share:/usr/share:/usr/local/share
[DEBUG] env var from spec file KREEN_SPEC_ARCH=
[DEBUG] after WORKAROUND LIB_SUFFIX=
[INFO] src/lib/kreenshoteditor add_custom_target: prepare-include-files
[INFO] lib/kreenshoteditor/end
[INFO] src/end
[INFO] root/add_subdirectory(tests)
[INFO] tests
[INFO] CMAKE_SOURCE_DIR=/home/mte90/Desktop/kde/kreenshot-editor
[INFO] CMAKE_CURRENT_SOURCE_DIR=/home/mte90/Desktop/kde/kreenshot-editor/tests
[INFO] CMAKE_CURRENT_BINARY_DIR=/home/mte90/Desktop/kde/kreenshot-editor/build/tests
[INFO] root/end
-- Configuring done
CMake Warning (dev) at src/CMakeLists.txt:41 (add_executable):
  Policy CMP0028 is not set: Double colon in target name means ALIAS or
  IMPORTED target.  Run "cmake --help-policy CMP0028" for policy details.
  Use the cmake_policy command to set the policy and suppress this warning.

  Target "kreenshot-editor" links to target "Qt5::Network" but the target was
  not found.  Perhaps a find_package() call is missing for an IMPORTED
  target, or an ALIAS target is missing?
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning (dev) at tests/CMakeLists.txt:25 (add_executable):
  Policy CMP0028 is not set: Double colon in target name means ALIAS or
  IMPORTED target.  Run "cmake --help-policy CMP0028" for policy details.
  Use the cmake_policy command to set the policy and suppress this warning.

  Target "Test1" links to target "Qt5::Network" but the target was not found.
  Perhaps a find_package() call is missing for an IMPORTED target, or an
  ALIAS target is missing?
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning (dev) at tests/CMakeLists.txt:31 (add_executable):
  Policy CMP0028 is not set: Double colon in target name means ALIAS or
  IMPORTED target.  Run "cmake --help-policy CMP0028" for policy details.
  Use the cmake_policy command to set the policy and suppress this warning.

  Target "TestCore" links to target "Qt5::Network" but the target was not
  found.  Perhaps a find_package() call is missing for an IMPORTED target, or
  an ALIAS target is missing?
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning (dev) at tests/CMakeLists.txt:37 (add_executable):
  Policy CMP0028 is not set: Double colon in target name means ALIAS or
  IMPORTED target.  Run "cmake --help-policy CMP0028" for policy details.
  Use the cmake_policy command to set the policy and suppress this warning.

  Target "TestSettings" links to target "Qt5::Network" but the target was not
  found.  Perhaps a find_package() call is missing for an IMPORTED target, or
  an ALIAS target is missing?
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning (dev) at tests/CMakeLists.txt:43 (add_executable):
  Policy CMP0028 is not set: Double colon in target name means ALIAS or
  IMPORTED target.  Run "cmake --help-policy CMP0028" for policy details.
  Use the cmake_policy command to set the policy and suppress this warning.

  Target "TestUi" links to target "Qt5::Network" but the target was not
  found.  Perhaps a find_package() call is missing for an IMPORTED target, or
  an ALIAS target is missing?
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning (dev) at tests/CMakeLists.txt:49 (add_executable):
  Policy CMP0028 is not set: Double colon in target name means ALIAS or
  IMPORTED target.  Run "cmake --help-policy CMP0028" for policy details.
  Use the cmake_policy command to set the policy and suppress this warning.

  Target "TestWidgetsInteractive" links to target "Qt5::Network" but the
  target was not found.  Perhaps a find_package() call is missing for an
  IMPORTED target, or an ALIAS target is missing?
This warning is for project developers.  Use -Wno-dev to suppress it.
```

```
root@siduction:/home/mte90/Desktop/kde/kreenshot-editor/build# make
Scanning dependencies of target kreenshot-editor_automoc
[  2%] Automatic moc for target kreenshot-editor
Generating moc_mainwindow.cpp
[  2%] Built target kreenshot-editor_automoc
Scanning dependencies of target prepare-include-files
[prepare-include-files.sh] start (first argument is INC_TARGET_DIR)
[prepare-include-files.sh] pwd=/home/mte90/Desktop/kde/kreenshot-editor/src/lib/kreenshoteditor
[prepare-include-files.sh] INC_TARGET_DIR=generated-include
/home/mte90/Desktop/kde/kreenshot-editor/src/lib/kreenshoteditor/prepare-include-files.sh: 18: /home/mte90/Desktop/kde/kreenshot-editor/src/lib/kreenshoteditor/pude-files.sh: Syntax error: "(" unexpected
src/lib/kreenshoteditor/CMakeFiles/prepare-include-files.dir/build.make:49: set di istruzioni per l'obiettivo "src/lib/kreenshoteditor/CMakeFiles/prepare-include riuscito
make[2]: *** [src/lib/kreenshoteditor/CMakeFiles/prepare-include-files] Errore 2
CMakeFiles/Makefile2:229: set di istruzioni per l'obiettivo "src/lib/kreenshoteditor/CMakeFiles/prepare-include-files.dir/all" non riuscito
make[1]: *** [src/lib/kreenshoteditor/CMakeFiles/prepare-include-files.dir/all] Errore 2
Makefile:127: set di istruzioni per l'obiettivo "all" non riuscito
make: *** [all] Errore 2
```