Updates CMakeLists.txt to avoid recreating vdate.c if nothing has changed

nbriggs · nbriggs · commit 578b26547aff · 2024-11-19T15:20:44.000-08:00
Creating vdate.c/vdate.o should not be done unconditionally.  It is only
necessary to recreate it if one of the input files has changed.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -438,9 +438,9 @@ SET(MAIKO_HDRS
     inc/z2defs.h
 )
 
-ADD_CUSTOM_TARGET(gen-vdate
+ADD_CUSTOM_COMMAND(OUTPUT vdate.c
   COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/bin/mkvdate > vdate.c
-  BYPRODUCTS vdate.c
+  DEPENDS ${MAIKO_SRCS} ${MAIKO_HDRS} ${MAIKO_DISPLAY_X11_SRCS} ${MAIKO_DISPLAY_X11_HDRS} ${MAIKO_DISPLAY_SDL_SRCS} ${MAIKO_DISPLAY_SDL_HDRS} 
 )
 
 ADD_EXECUTABLE(lde src/ldeboot.c src/unixfork.c)

Original file line number	Diff line number	Diff line change
`@@ -438,9 +438,9 @@ SET(MAIKO_HDRS`
`438`	`438`	`inc/z2defs.h`
`439`	`439`	`)`
`440`	`440`
`441`		`-ADD_CUSTOM_TARGET(gen-vdate`
	`441`	`+ADD_CUSTOM_COMMAND(OUTPUT vdate.c`
`442`	`442`	`COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/bin/mkvdate > vdate.c`
`443`		`- BYPRODUCTS vdate.c`
	`443`	`+ DEPENDS ${MAIKO_SRCS} ${MAIKO_HDRS} ${MAIKO_DISPLAY_X11_SRCS} ${MAIKO_DISPLAY_X11_HDRS} ${MAIKO_DISPLAY_SDL_SRCS} ${MAIKO_DISPLAY_SDL_HDRS}`
`444`	`444`	`)`
`445`	`445`
`446`	`446`	`ADD_EXECUTABLE(lde src/ldeboot.c src/unixfork.c)`