Permit building GUI helper tools.

These look like puzzles, in that they link against a frontend and
provide the usual 'struct game', but they don't count as a puzzle for
purposes of shipping, or even having to have descriptions and icons.

There's one of these buried in the code already under an ifdef, which
I'll re-enable in the next commit.

5 files changed, 20 insertions, 2 deletions

diff --git a/cmake/platforms/emscripten.cmake b/cmake/platforms/emscripten.cmake
index c7e55fe..5673ebe 100644
--- a/cmake/platforms/emscripten.cmake
+++ b/cmake/platforms/emscripten.cmake
@@ -35,11 +35,15 @@ set(CMAKE_C_LINK_FLAGS "\
 -s EXTRA_EXPORTED_RUNTIME_METHODS='[cwrap,callMain]'")
 
 set(build_cli_programs FALSE)
+set(build_gui_programs FALSE)
 
 function(get_platform_puzzle_extra_source_files OUTVAR NAME)
   set(${OUTVAR} PARENT_SCOPE)
 endfunction()
 
+function(set_platform_gui_target_properties TARGET)
+endfunction()
+
 function(set_platform_puzzle_target_properties NAME TARGET)
   em_link_pre_js(${TARGET} ${CMAKE_SOURCE_DIR}/emccpre.js)
   em_link_js_library(${TARGET} ${CMAKE_SOURCE_DIR}/emcclib.js)
diff --git a/cmake/platforms/nestedvm.cmake b/cmake/platforms/nestedvm.cmake
index 6862896..3f768a4 100644
--- a/cmake/platforms/nestedvm.cmake
+++ b/cmake/platforms/nestedvm.cmake
@@ -15,7 +15,7 @@ function(get_platform_puzzle_extra_source_files OUTVAR NAME)
   set(${OUTVAR} PARENT_SCOPE)
 endfunction()
 
-function(set_platform_puzzle_target_properties NAME TARGET)
+function(set_platform_gui_target_properties TARGET)
   set(build_subdir ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}-tmp)
 
   add_custom_command(OUTPUT ${build_subdir}
@@ -56,5 +56,8 @@ function(set_platform_puzzle_target_properties NAME TARGET)
       ${build_subdir}/PuzzleEngine.class)
 endfunction()
 
+function(set_platform_puzzle_target_properties NAME TARGET)
+endfunction()
+
 function(build_platform_extras)
 endfunction()
diff --git a/cmake/platforms/osx.cmake b/cmake/platforms/osx.cmake
index 4577a73..2e95d4b 100644
--- a/cmake/platforms/osx.cmake
+++ b/cmake/platforms/osx.cmake
@@ -6,10 +6,15 @@ set(CPACK_DMG_VOLUME_NAME "Simon Tatham's Puzzle Collection")
 include(CPack)
 set(build_individual_puzzles FALSE)
 
+set(build_gui_programs FALSE) # they don't really fit in the OS X GUI model
+
 function(get_platform_puzzle_extra_source_files OUTVAR NAME)
   set(${OUTVAR} PARENT_SCOPE)
 endfunction()
 
+function(set_platform_gui_target_properties TARGET)
+endfunction()
+
 function(set_platform_puzzle_target_properties NAME TARGET)
 endfunction()
 
diff --git a/cmake/platforms/unix.cmake b/cmake/platforms/unix.cmake
index 26d2e97..09eed6a 100644
--- a/cmake/platforms/unix.cmake
+++ b/cmake/platforms/unix.cmake
@@ -75,6 +75,9 @@ function(get_platform_puzzle_extra_source_files OUTVAR NAME)
   set(${OUTVAR} ${c_icon_file} PARENT_SCOPE)
 endfunction()
 
+function(set_platform_gui_target_properties TARGET)
+endfunction()
+
 function(set_platform_puzzle_target_properties NAME TARGET)
   get_target_property(official ${TARGET} official)
   get_target_property(exename ${TARGET} exename)
diff --git a/cmake/platforms/windows.cmake b/cmake/platforms/windows.cmake
index 377b05d..d4b9092 100644
--- a/cmake/platforms/windows.cmake
+++ b/cmake/platforms/windows.cmake
@@ -37,11 +37,14 @@ function(get_platform_puzzle_extra_source_files OUTVAR NAME)
   set(${OUTVAR} ${CMAKE_SOURCE_DIR}/puzzles.rc PARENT_SCOPE)
 endfunction()
 
+function(set_platform_gui_target_properties TARGET)
+  set_target_properties(${TARGET} PROPERTIES WIN32_EXECUTABLE ON)
+endfunction()
+
 function(set_platform_puzzle_target_properties NAME TARGET)
   if(DEFINED ICO_DIR AND EXISTS ${ICO_DIR}/${NAME}.ico)
     target_compile_definitions(${TARGET} PRIVATE ICON_FILE=\"${ICO_DIR}/${NAME}.ico\")
   endif()
-  set_target_properties(${TARGET} PROPERTIES WIN32_EXECUTABLE ON)
 endfunction()
 
 function(build_platform_extras)