On Tuesday 20 August 2002 9:18 am, Jean-Marc Lasgouttes wrote:
> >>>>> "Angus" == Angus Leeming <[EMAIL PROTECTED]> writes:
>
> Angus> I'm damned if I can see what's wrong with this Makefile.
> Angus> Running make gives: aleem@thorax:xforms$ make make: *** No rule
> Angus> to make target `form_client.C', needed by `all'. Stop.
>
> Angus> all: ${FDC}
>
> Shouldn't this use parenthesis instead of curly brackets?
Thanks, all, for the help. I now have a Makefile that works perfectly and
that I (mostly) understand. Things I don't understand:
* DEPS_MAGIC.
At what point is it invoked?
What does ":=" mean.
Why is the body wrapped inside a $(...)
That final ":"
* .C.o
The intent is clear enough even if some of the particulars evade me ;-)
I haven't come across $(*F) before. Why not just $* ?
And Ok, I'll bite: what's the reason for the tr and sed magic? I can
see what it does (diff -u file.pp file.P): it creates dependency info
for the .C and .h files from the .o file dependency info generated
by the compiler, but I don't see why this is valuable info.
Regards,
Angus
CXX=g++
CXXFLAGS = -I/usr/local/include -I/home/aleem//lyx/devel/boost -g
CXXCOMPILE = $(CXX) $(CXXFLAGS)
LIBS = -lforms -L/usr/X11R6/lib -lX11 -lm
.SUFFIXES: .C .o
CLIENTXFORMSOBJS = xforms/Client.o xforms/PipeMonitor.o \
xforms/FormClient.o xforms/form_client.o
CLIENTSRCS = ClientController.C ClientView.C main.C support.C
CLIENTOBJS = $(CLIENTSRCS:.C=.o)
CLIENTDEP = $(CLIENTOBJS:%.o=.deps/%.P)
ALLDEP = $(CLIENTDEP)
all: client
DEPS_MAGIC := $(shell mkdir .deps > /dev/null 2>&1 || :)
-include $(ALLDEP)
client: xforms-all $(CLIENTOBJS)
$(CXX) -o client $(CLIENTXFORMSOBJS) $(CLIENTOBJS) $(LIBS)
xforms-all xforms-clean xforms-distclean:
target=`echo $@ | sed s/xforms-//`; \
echo "Making $$target in xforms"; \
(cd xforms && make $$target )
clean: xforms-clean
rm -f client *.o
distclean: clean xforms-distclean
rm -f *.orig *.rej *~; \
rm -rf .deps
.C.o:
@echo '$(CXXCOMPILE) -c $<'; \
$(CXXCOMPILE) -Wp,-MD,.deps/$(*F).pp -c $<
@-cp .deps/$(*F).pp .deps/$(*F).P; \
tr ' ' '\012' < .deps/$(*F).pp \
| sed -e 's/^\\$$//' -e '/^$$/ d' -e '/:$$/ d' -e 's/$$/ :/' \
>> .deps/$(*F).P; \
rm .deps/$(*F).pp
