How to check value of defined symbols (Eclipse->Paths & Symbols) in a makefile?
We have a project that used to be an Eclipse-managed CDT project. However, I am trying to change it to a standard makefile project.
One of them has a couple of symbols defined in
Project Properties->C/C++ General->Paths & Symbols->Symbols.
The makefiles generated by Eclipse used to automatically get the value when it was managed. The sym开发者_StackOverflow社区bols need to be sent to the compiler. How do I get the value in my own makefile? Is there a way?
Thanks, and sorry, I know the questions sounds convoluted.
Edit:
By symbols I mean the -D symbols for the compiler. What we have is a COMPILE_FOR_A & COMPILE_FOR_B and the values are either 1 or 0. If COMPILE_FOR_A=1, it will use particular values, and if COMPILE_FOR_B=1 it will use some other values.
Use environment variables and conditionals to tell your options to make. Something like:
DEFINES = -DFOO
ifeq ($(COMPILE_FOR_A),1)
DEFINES += -DBAR
else
DEFINES += -DBAZ
endif
Then invoke make
with/without the variable in the environment:
~$ COMPILE_FOR_A=1 make
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