Stepan Kasal wrote:
> About the side topic of suffixes:
> [...]
I finally decided that suffixes are good and ``are worth it'', mostly
because I use generated files in 4 different directories (with two
files in one of them), so rewriting the rule 5 times is kinda nasty.
Based on your suggestions, study of GTK+ `Makefile.am' and own thoughts,
I came up with this:
[file `aux/list.make']
SUFFIXES = .list
$(LIST_STAMP_FILES) : Makefile $(PARSE_LIST_COMMAND)
# `PARSE_LIST_COMMAND' and `PARSE_LIST_FLAGS' should be set by the
# includer.
#
PARSE_LIST = $(PARSE_LIST_COMMAND) $(PARSE_LIST_FLAGS)
# We use `cmp' here to avoid unneeded recompilations of files that
# depend on generated ones (only really useful for `.h' files.)
#
PARSE_LIST_BUILD_RULE = \
if $(PARSE_LIST) `test -f '$<' || echo '$(srcdir)/'`$< \
$*.h.new $*.c.new; then \
if cmp -s $*.c.new $*.c; \
then rm -f $*.c.new; else mv -f $*.c.new $*.c; \
fi; \
if cmp -s $*.h.new $*.h; \
then rm -f $*.h.new; else mv -f $*.h.new $*.h; \
fi; \
echo timestamp > $@; \
else \
(rm -f $*.c $*.c.new $*.h $*.h.new ; exit 1) \
fi
.list.stamp:
$(PARSE_LIST_BUILD_RULE)
# Since $(LIST_GENERATED_FILES) defined by the includer don't (at
# least shouldn't) have any dependencies, if this rule is being
# executed, it probably means that one of the files was removed.
# Then all we can do is to force rebuilding of corresponding stamp
# file, which builds the required sources ``by side-effect.''
#
$(LIST_GENERATED_FILES):
rm -f $*.stamp;
$(MAKE) $(AM_MAKEFLAGS) $*.stamp
[usage]
noinst_LIBRARIES = libfoo.a
LIST_FILES = foo.list bar.list
LIST_STAMP_FILES = foo.stamp bar.stamp
LIST_GENERATED_FILES = foo.c bar.c foo.h bar.h
PARSE_LIST_COMMAND = ...
PARSE_LIST_FLAGS = ...
include $(top_srcdir)/aux/list.make
libfoo_a_SOURCES = ... $(LIST_FILES)
nodist_libfoo_a_SOURCES = $(LIST_GENERATED_FILES)
BUILT_SOURCES = $(LIST_STAMP_FILES)
MOSTLYCLEANFILES = $(LIST_STAMP_FILES) $(LIST_GENERATED_FILES)
Everything seems to work just fine and as expected, however I suspect
that the ``rm -f $*.stamp; $(MAKE) $(AM_MAKEFLAGS) $*.stamp'' command
will cause the problem with parallel make you mentioned. Is it so?
Also, is there a way to automatically set `LIST_STAMP_FILES' and
`LIST_GENERATED_FILES' from `LIST_FILES'? (I'm aware of GNU make's
text manipulation functions, but they are GNU make specific...)
Paul
