Andrea Riciputi <[EMAIL PROTECTED]> writes:
>
> SourceDir/
> *.c
> *.h
> makefile
> target.mk
> ObjectDir/
> *.o
> *.lo
> *.exe
> *.so
> WrapperDir/
> *.i
>
> The "makefile" and "target.mk" files are adapted from Paul's site
> examples, all the object files are placed in the "ObjectDir", while the
> inteface files for the wrapper are placed in the "WrapperDir". The
> wrapper uses the .i file to create a .c file with the wrapping code.
> Obviously the resulting wrapping code must be placed in the "SourceDir"
> along with all the other .c files.
>
> My intention is to check for .i files before starting gcc compilation.
> When any of the .i files is newer than the wrapping code make should
> call the wrapper create the new wrapping code, put it in the
> "SourceDir" and after that call gcc.
I would approach this as follows:
(1) create SourceDir/Makefile.wrapper which generates .c from .i and
look something like this:
.vpath: %.i WrapperDir
# wc stands for 'wrapper compiler' and not what you thought ;-)
%.c : %.i
wc -o $@ $<
.PHONY: all
all : foo.c bar.c
(2) create SourceDir/ObjectDir/Makefile that compiles your so/exe
(3) create SourceDir/Makefile that invokes make on
SourceDir/Makefile.wrapper and SourceDir/ObjectDir/Makefile in right
order:
.SUFFIXES:
.PHONY: _submodules
_submodules::
target_directory_list := ObjectDir
target_makefile_list := Makefile.wrapper
ObjectDir : Makefile.wrapper
.PHONY: $(target_directory_list) $(target_makefile_list)
_submodules:: $(target_directory_list) $(target_makefile_list)
$(target_directory_list):
$(MAKE) -C $@ $(MAKECMDGOALS)
$(target_makefile_list):
$(MAKE) --no-print-directory -f $@ $(MAKECMDGOALS)
# These rules keep make from trying to use the match-anything rule below to
# rebuild the makefiles.
#
Makefile : ;
%.mk :: ;
%.rules :: ;
# Anything we don't know how to build will use this rule. The command is a
# do-nothing command, but the prerequisites ensure that the appropriate
# recursive invocations of make will occur.
#
% :: $(target_directory_list) $(target_makefile_list) ;
hth,
-boris
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