Hello, On Sat, Dec 31, 2005 at 02:51:30AM -0500, Braden McDaniel wrote: > but the behavior is the same: the sources are regenerated every time, > regardless of whether the antlr grammar has been modified.
I can imagine several problems: 1) there is a prerequisite which is always refreshed and causes this 2) If you use non-GNU make, it can may not understand that "./foo.c" and "foo.c" is the same file. 3) If you work on a networked drive, the target may have time stamp in the future, and make decides to refresh it. I cannot guess more without seeing the makefile. Could you please post (an URL to) a self-contained example? If you are able to cut some parts and make the example smaller, that would definitely help. > I have some sources that are generated with antlr. I have custom make > rules that generate the sources from the antlr grammar. I have tried > listing the generated sources in both BUILT_SOURCES and _DEPENDENCIES, Overriding *_DEPENDENCIES is dangerous, it is better to let Automake compute it. The BUILT_SOURCES hack is useful sometimes, but it's better to avoid it. Perhaps you could use a suffix rule .antlr.c: custom commands and then add the antlr grammar file to *_SOURCES: myprog_SOURCES = ... foo.antlr ... Happy hacking in the New Year! Stepan Kasal