Hi all,
It seems that gmake doesn't take in account per-target VPATH variable. I want to
write something like
MODULE = foo
$(BUILDDIR)/$(MODULE)/.obj/bar.o : VPATH = $(SRCDIR)/$(MODULE)
$(BUILDDIR)/$(MODULE)/.obj/%.o : %.cxx
$(CXX) $(CXX_FLAGS) -c -o $@ $<
I'm playing with the idea of having non-recursive makefile(s) for multi-directory
build.
Without target-specific VPATH I need to either specify exact source directory in the
rule, like:
$(BUILDDIR)/$(MODULE)/.obj/%.o : $(SRCDIR)/$(MODULE)/%.cxx
$(CXX) $(CXX_FLAGS) -c -o $@ $<
(if a module has multiple source directories and different source file suffixes it's
not convenient)
or have a single vpath directive for an entire build tree:
SOURCE_PATH = $(MODULE1_SRCDIR):$(MODULE2_SRCDIR):$(MODULE3_SRCDIR)
vpath %.cxx $(SOURCE_PATH)
...
$(BUILDDIR)/$(MODULE)/.obj/%.o : %.cxx
$(CXX) $(CXX_FLAGS) -c -o $@ $<
though in this case source file name must be unique accross the whole source tree.
Having working pattern-specific VPATH would be even better. I wonder whether it's
going to be
implemented in future versions of gmake. Any ideas and suggestions about this issue
are welcome.
Regards,
Alex
P.S. I've been thinking about introducing a notion of components in the build process.
For example, it'd be great if gmake were able to recognize global and
component-specific variable & rule scopes.
Right now in order to simulate that I need to prefix each component-specific variable
by the unique
component name which is not very much convenient.
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