trying to add support for generating version info from git (does not work yet)

CMakeLists.txt

@@ -44,7 +44,6 @@ target_compile_definitions(ptouch-print
         USING_CMAKE=1
         VERSION="${VERSION}"
         PACKAGE="ptouch"
-
 )
 
 target_include_directories(ptouch-print
@@ -59,3 +58,12 @@ target_link_libraries(ptouch-print
         ${GD_LIBRARIES}
         ${LIBUSB_LIBRARIES}
 )
+
+# Add a custom command that produces version.cpp, plus
+# a dummy output that's not actually produced, in order
+# to force version.cmake to always be re-run before the build
+ADD_CUSTOM_COMMAND(
+    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/version.cpp
+           ${CMAKE_CURRENT_BINARY_DIR}/_version.cpp
+    COMMAND ${CMAKE_COMMAND} -P
+            ${CMAKE_CURRENT_SOURCE_DIR}/version.cmake)