CMake: give yamlcpp a proper imported target

- This makes linking easier,
 - Adds the right includes (needed on FreeBSD),
 - Lets us drop silly GUI setting for non-GUI tests (I think this was
   a side-effect of compiling on FreeBSD, where UI would pull in
   /usr/local/include).

CMakeModules/FindYAMLCPP.cmake

@@ -1,9 +1,11 @@
 # Locate yaml-cpp
 #
 # This module defines
-#  YAMLCPP_FOUND, if false, do not try to link to yaml-cpp
-#  YAMLCPP_LIBRARY, where to find yaml-cpp
-#  YAMLCPP_INCLUDE_DIR, where to find yaml.h
+#   YAMLCPP_FOUND, if false, do not try to link to yaml-cpp
+#   YAMLCPP_LIBRARY, where to find yaml-cpp
+#   YAMLCPP_INCLUDE_DIR, where to find yaml.h
+# There is also one IMPORTED library target,
+#   yamlcpp
 #
 # By default, the dynamic libraries of yaml-cpp will be found. To find the static ones instead,
 # you must set the YAMLCPP_STATIC_LIBRARY variable to TRUE before calling find_package(YamlCpp ...).
@@ -48,3 +50,12 @@ find_library(YAMLCPP_LIBRARY
 include(FindPackageHandleStandardArgs)
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(YAMLCPP DEFAULT_MSG YAMLCPP_INCLUDE_DIR YAMLCPP_LIBRARY)
 mark_as_advanced(YAMLCPP_INCLUDE_DIR YAMLCPP_LIBRARY)
+
+# Add an imported target
+if( YAMLCPP_LIBRARY )
+    add_library( yamlcpp UNKNOWN IMPORTED )
+    set_property( TARGET yamlcpp PROPERTY IMPORTED_LOCATION ${YAMLCPP_LIBRARY} )
+    if ( YAMLCPP_INCLUDE_DIR )
+        set_property( TARGET yamlcpp PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${YAMLCPP_INCLUDE_DIR} )
+    endif()
+endif()

src/modules/contextualprocess/CMakeLists.txt

@@ -10,10 +10,9 @@ calamares_add_plugin( contextualprocess
 
 calamares_add_test(
     contextualprocesstest
-    GUI  # It's not
     SOURCES
         Tests.cpp
         ContextualProcessJob.cpp  # Builds it a second time
     LIBRARIES
-        ${YAMLCPP_LIBRARY}
+        yamlcpp
 )

src/modules/fsresizer/CMakeLists.txt

@@ -36,7 +36,7 @@ if ( KPMcore_FOUND AND Qt5DBus_FOUND AND KF5CoreAddons_FOUND AND KF5Config_FOUND
             Tests.cpp
         LIBRARIES
             calamares_job_fsresizer  # From above
-            ${YAMLCPP_LIBRARY}
+            yamlcpp
     )
     if( TARGET fsresizertest )
         target_compile_definitions( fsresizertest PRIVATE ${_partition_defs} )

src/modules/hostinfo/CMakeLists.txt

@@ -34,10 +34,9 @@ endif()
 
 calamares_add_test(
     hostinfotest
-    GUI  # It's not
     SOURCES
         Tests.cpp
         HostInfoJob.cpp
     LIBRARIES
-        ${YAMLCPP_LIBRARY}
+        yamlcpp
 )

src/modules/initcpio/CMakeLists.txt

@@ -10,10 +10,9 @@ calamares_add_plugin( initcpio
 
 calamares_add_test(
     initcpiotest
-    GUI  # It's not
     SOURCES
         Tests.cpp
     LIBRARIES
         calamares_job_initcpio # From above
-        ${YAMLCPP_LIBRARY}
+        yamlcpp
 )

src/modules/initramfs/CMakeLists.txt

@@ -10,10 +10,9 @@ calamares_add_plugin( initramfs
 
 calamares_add_test(
     initramfstest
-    GUI  # It's not
     SOURCES
         Tests.cpp
     LIBRARIES
         calamares_job_initramfs # From above
-        ${YAMLCPP_LIBRARY}
+        yamlcpp
 )

src/modules/locale/CMakeLists.txt

@@ -27,7 +27,7 @@ calamares_add_plugin( locale
         calamaresui
         Qt5::Network
         ${geoip_libs}
-        ${YAMLCPP_LIBRARY}
+        yamlcpp
     SHARED_LIB
 )
 

src/modules/shellprocess/CMakeLists.txt

@@ -10,9 +10,8 @@ calamares_add_plugin( shellprocess
 
 calamares_add_test(
     shellprocesstest
-    GUI  # It's not
     SOURCES
         Tests.cpp
     LIBRARIES
-        ${YAMLCPP_LIBRARY}
+        yamlcpp
 )