debian/changelog

+qgis (2.18.17+dfsg-1~exp3) experimental; urgency=medium
+
+  * Add patch to add dependency on qgis_gui target to fix parallel build.
+
+ -- Bas Couwenberg <sebastic@debian.org>  Mon, 26 Feb 2018 19:06:48 +0100
+
 qgis (2.18.17+dfsg-1~exp2) experimental; urgency=medium
 
   * Fix qgis.qch install in arch-indep target.

debian/patches/series

@@ -5,3 +5,4 @@ exclude-elvensword-resources.patch
 occurred-typo.patch
 number-typo.patch
 columns-typo.patch
+wms-provider-dependencies.patch

debian/patches/wms-provider-dependencies.patch

+Description: Add dependency on qgis_gui target to fix parallel build.
+ In file included from /<<BUILDDIR>>/qgis-2.18.17+dfsg/src/providers/wms/qgswmssourceselect.cpp:26:0:
+ /<<BUILDDIR>>/qgis-2.18.17+dfsg/src/providers/wms/../../gui/qgsgenericprojectionselector.h:20:10: fatal error: ui_qgsgenericprojectionselectorbase.h: No such file or directory
+  #include <ui_qgsgenericprojectionselectorbase.h>
+           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Author: Bas Couwenberg <sebastic@debian.org>
+Forwarded: https://github.com/qgis/QGIS/pull/6471
+
+--- a/src/providers/wms/CMakeLists.txt
++++ b/src/providers/wms/CMakeLists.txt
+@@ -46,6 +46,8 @@ INCLUDE_DIRECTORIES(SYSTEM
+ ADD_LIBRARY(wmsprovider_a STATIC ${WMS_SRCS} ${WMS_MOC_SRCS})
+ ADD_LIBRARY(wmsprovider MODULE ${WMS_SRCS} ${WMS_MOC_SRCS})
+ 
++ADD_DEPENDENCIES(wmsprovider qgis_gui)
++
+ TARGET_LINK_LIBRARIES(wmsprovider
+   qgis_core
+   qgis_gui