Fix building based on unix makefiles

There are a few subtle differences between unix makefiles and ninja
that sometimes go uncaught as the core devs usually use ninja.
This commit fixes two:
- don't depend directly on files in other source/binary directories.
  Use a custom target to depend on instead
- recursively create target directories, as make doesn't automatically

doc/CMakeLists.txt

@@ -38,7 +38,7 @@ install(FILES ${DATADIR_BUILD}/gnucash/tip_of_the_day.list DESTINATION ${CMAKE_I
 
 foreach (manpage gnucash gnucash-cli)
     add_custom_command(OUTPUT ${DATADIR_BUILD}/gnucash/${manpage}.1
-        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${manpage}.1.in ${VCS_INFO_FILE}
+        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${manpage}.1.in gnc-vcs-info
         COMMAND ${CMAKE_COMMAND}
             -D SRC=${CMAKE_CURRENT_SOURCE_DIR}/${manpage}.1.in
             -D DST=${manpage}.1

gnucash/gnome/CMakeLists.txt

@@ -196,7 +196,7 @@ endif()
 
 add_custom_command(
     OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/gnucash.appdata.xml
-    DEPENDS ${GNC_APPDATA_IN} ${VCS_INFO_FILE} ${CMAKE_CURRENT_SOURCE_DIR}/gnucash.releases.xml
+    DEPENDS ${GNC_APPDATA_IN} gnc-vcs-info ${CMAKE_CURRENT_SOURCE_DIR}/gnucash.releases.xml
     COMMAND ${CMAKE_COMMAND} -D SRC=${GNC_APPDATA_IN}
                              -D DST=${CMAKE_CURRENT_BINARY_DIR}/gnucash.appdata.xml
                              -D VCS_INFO_FILE=${VCS_INFO_FILE}
@@ -223,7 +223,7 @@ add_custom_command (
 
 add_custom_command (
     OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/gnucash.desktop
-    DEPENDS ${GNC_DESKTOP_IN} ${VCS_INFO_FILE}
+    DEPENDS ${GNC_DESKTOP_IN} gnc-vcs-info
     COMMAND ${CMAKE_COMMAND} -D SRC=${GNC_DESKTOP_IN}
                              -D DST=${CMAKE_CURRENT_BINARY_DIR}/gnucash.desktop
                              -D VCS_INFO_FILE=${VCS_INFO_FILE}

po/CMakeLists.txt

@@ -21,6 +21,7 @@ foreach (lingua ${ALL_LINGUAS})
   list (APPEND po_SOURCES ${lingua}.po)
 
   set (_LOCALE_DIR ${DATADIR_BUILD}/locale/${lingua}/LC_MESSAGES)
+  file (MAKE_DIRECTORY "${_LOCALE_DIR}") # Unix Makefiles won't do this automatically, ninja does
   set (_MO_FILE ${_LOCALE_DIR}/gnucash.mo)
   list (APPEND CATALOGS ${_MO_FILE})