diff -r 7434a0f80b91 -r 9bcca0a49d44 CMakeLists.txt
--- a/CMakeLists.txt	Wed Sep 06 18:14:21 2017 +0200
+++ b/CMakeLists.txt	Wed Sep 06 18:08:36 2017 +0200
@@ -170,15 +170,21 @@
   EXEC_PROGRAM(sh ARGS "${wxWidgets_CONFIG_EXECUTABLE} --version" OUTPUT_VARIABLE wxWidgets_VERSION)
   STRING(REGEX REPLACE "^([0-9]+\\.[0-9]+)\\..*" "\\1"  wxWidgets_VERSION ${wxWidgets_VERSION})
   IF(wxWidgets_VERSION VERSION_LESS "3.0")
-    MESSAGE(FATAL_ERROR "At least wxWidgets 3.0 is required")
+    SET(wxWidgets_FOUND FALSE)
+    MESSAGE("At least wxWidgets 3.0 is required")
   ENDIF()
   # Ubuntu has 2 different devel packages, we need the GUI version
   EXEC_PROGRAM(sh ARGS "${wxWidgets_CONFIG_EXECUTABLE} --query-toolkit" OUTPUT_VARIABLE wxWidgets_TOOLKIT)
   IF(wxWidgets_TOOLKIT STREQUAL "base")
-    MESSAGE(FATAL_ERROR "wxWidgets is as non-GUI package configured. Check you wxWidgets installation (maybe wxgtkXX-devel is missing)")
+    SET(wxWidgets_FOUND FALSE)
+    MESSAGE("wxWidgets is as non-GUI package configured. Check you wxWidgets installation (maybe wxgtkXX-devel is missing)")
   ENDIF()
 ENDIF (UNIX)
 
+IF(NOT wxWidgets_FOUND)
+  MESSAGE("wxWidgets was not found, GUI programs (hugin, nona_gui) disabled")
+ENDIF(NOT wxWidgets_FOUND) 
+
 ##
 ## Graphics libraries
 ##
diff -r 7434a0f80b91 -r 9bcca0a49d44 src/CMakeLists.txt
--- a/src/CMakeLists.txt	Wed Sep 06 18:14:21 2017 +0200
+++ b/src/CMakeLists.txt	Wed Sep 06 18:08:36 2017 +0200
@@ -35,4 +35,8 @@
 
 add_subdirectory(hugin_cpfind)
 add_subdirectory(translations)
-add_subdirectory(hugin1)
+
+# build gui only if wxWidgets was found
+IF(wxWidgets_FOUND)
+  add_subdirectory(hugin1)
+ENDIF(wxWidgets_FOUND)
diff -r 7434a0f80b91 -r 9bcca0a49d44 src/hugin1/CMakeLists.txt
--- a/src/hugin1/CMakeLists.txt	Wed Sep 06 18:14:21 2017 +0200
+++ b/src/hugin1/CMakeLists.txt	Wed Sep 06 18:08:36 2017 +0200
@@ -1,17 +1,21 @@
 
 include_directories( ${CMAKE_SOURCE_DIR}/src/hugin1 )
 
-INCLUDE(${wxWidgets_USE_FILE})
+# build gui only if wxWidgets was found
+IF(wxWidgets_FOUND)
+  INCLUDE(${wxWidgets_USE_FILE})
 
-# do we need to define _UNICODE on windows?
-IF(WIN32)
-  ADD_DEFINITIONS(-D_UNICODE -DUNICODE)
-ENDIF(WIN32)
+  # do we need to define _UNICODE on windows?
+  IF(WIN32)
+    ADD_DEFINITIONS(-D_UNICODE -DUNICODE)
+  ENDIF(WIN32)
 
-add_subdirectory(base_wx)
-add_subdirectory(stitch_project)
-add_subdirectory(icpfind)
-add_subdirectory(executor)
-add_subdirectory(hugin)
-add_subdirectory(ptbatcher)
-add_subdirectory(calibrate_lens)
+  add_subdirectory(base_wx)
+  add_subdirectory(stitch_project)
+  add_subdirectory(icpfind)
+  add_subdirectory(executor)
+  add_subdirectory(hugin)
+  add_subdirectory(ptbatcher)
+  add_subdirectory(calibrate_lens)
+ENDIF(wxWidgets_FOUND)
+