C++ Dependencies Generation is Very Slow in Solaris 10..

Question

Hi
We are also having Slow make dependencies problem. It is taking more than 24 hrs to make dependencies in SOLARIS 10.
OS : SOLARIS 10
C++ COmpiler: Sun Studio 10: C++ 5.7 Compiler
It is very slow when it comes to generating dependencies using 'makedepend'....
Looking for your great help...
thanks
chakra

Answer 1

Hello,
Currently I'm trying to use the CC -xM compiler option to generate dependency info for source files.
By default I think that the -xM option assumes that all the object files are in the same directory as the output file
Suppose if the object files are in a different directory than the source files then how does the -xM recoginize it??
Because when I give in my makefiel as given below, depend option works fine.
$(OBJS):%.o:%.cxx
$(CXX) -xM1 $(CFLAGS) $< > $*.P
$(CXX) $(CFLAGS) $(@F:.o=.cxx) -o $@
-include $(SRCS:.cxx=.P)
But when the object files are in a different directory as given below it does not work properly.
$(OBJS):$(OUTPUT_DIR)/%.o:%.cxx
$(CXX) -xM1 $(CFLAGS) $< > $(OUTPUT_DIR)/$*.P
$(CXX) $(CFLAGS) $(@F:.o=.cxx) -o $@
-include $(SRCS:%.cxx=$(OUTPUT_DIR)/%.P)
From what I found when -xM1 ouputs info it assumes that alll the object files are in the same directory as the source files.
When I give a "make" in the source directory it displays like this.
CEventQueue.o : CEventQueue.cxx
CEventQueue.o : CEventQueue.h
CEventQueue.o : ../../pdfcore/src//CCoQueueService.h
CEventQueue.o : ../../pdfcore/src//CCoPthreadObj.h
CEventQueue.o : ../../pdfcommon/src//CPdfObject.h
CEventQueue.o : ../../pdfcommon/src//CPdfTrace.h
CEventQueue.o : ../../pdfcommon/src//CPdfException.h
CEventQueue.o : ../../pdfcommon/src//PdfType.h
But actually it should refer the .o's like this.
../../build/CEventQueue.o : CEventQueue.cxx where ../../build is the OUTPUT_DIR.
I found that there is no CC compiler option for adding prefix to object files.
Could you tell me what to do now.??All the makefiles in our project create the .o files in a seperate directory other than the source directory.
Thanks in advance,
GA