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

[Paul D. Smith]

%% Lin George <address@hidden> writes:

  lg> My question is that, what is the relationship between CXXFLAG and
  lg> CPPFLAG. I have followed your method and dumped output to a file
  lg> called "implicit_rule". Then I use grep to find the relationship
  lg> between CXXFLAG and CPPFLAG -- they seem to be two individual
  lg> variables

Yes... that's why I said:

  > Actually it's not including in those variables,

  lg> without any relationship.

They do have a relationship: CPPFLAGS is also present in all the command
lines where CXXFLAGS is:

  lg> LINK.cc = $(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
  lg> COMPILE.cc = $(CXX) $(CXXFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c

That's why I said:

  > but it's included in the rules where those variables are used.

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