RE: make can not find .cpp file, any general comments or suggesti ons to debug?

[Lin George]

Thanks Joost!


Sorry that I may not make myself understood. The point
which confuse me is not the function of CPPFLAGS or
CFLAGS, the confusion point is that, I think Paul mean
variable CXXFLAGS automatically includes variable
CPPFLAGS, which I have not found from GNU make manual
-- if I correctly understand Paul's points. :-)


regards,
George

--- "Leeuwesteijn,Joost"
<address@hidden> wrote:

> 
> > but I can not find the relationship between
> CXXFLAGS and
> > CPPFLAGS (for example, CXXFLAGS includes CPPFLAGS)
> --
> > to my surprise, instead I found that CPPFLAGS is
> used
> > for C (not C++)? Here is the original text from
> GNU
> > make manual,
> > --------------------
> > CXXFLAGS Extra flags to give to the C++ compiler.
> > CPPFLAGS Extra flags to give to the C preprocessor
> and
> > programs that use it (the C and Fortran
> compilers).
> > --------------------
> 
> Example of compile commands:
> 
> To compile C++:
> $(CXX) $(CPPFLAGS) $(CXXFLAGS) etc.
> 
> To compile C:
> $(CC) $(CPPFLAGS) $(CFLAGS) etc.
> 
> CPPFLAGS contains include directories (-I) and
> defines (-D), which can be
> reused between C++ and C.
> 
> When you need to call the preprocessor (for example
> to generate dependencies
> automagically), you only need to specify the
> $(CPPFLAGS) because you put
> them in the separate $(CPPFLAGS) variable. Otherwise
> you would have to strip
> them from the $(CFLAGS) because it also contains
> parameters that the
> preprocessor can't handle.
> 
> Hope this helps.
> 
> --
> Joost Leeuwesteijn
> 


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