22 Sep
2004
22 Sep
'04
9:43 p.m.
Akim Demaille <akim@epita.fr> writes:
$(srcdir)/ast-fwd-gen.stamp: $(gen_dir)/ast-fwd-gen $(ast_gen_deps) @rm -rf $@.tmp @touch $@.tmp $(gen_dir)/ast-fwd-gen $(srcdir) < $(srcdir)/ast.xml @mv -f $@.tmp $@ fwd.hh: ast-fwd-gen.stamp
## ## Why use such a mechanism to update stamp?
Read Automake.texi.
[...] Oh la :) You explained me, Then I used, The stamp trick When I was Working on TC's AST generation I meant: "why touch $@ is not enough?" Because: `data.tmp' is created before `foo' is run, so it has a timestamp older than output files output by `foo'. It is then renamed to `data.stamp' after `foo' has run, because we do not want to update `data.stamp' if `foo' fails. Thanks! -- Noe