I'm trying to figure out how to build a variable string for the #include statement using GCC.
The idea is that for each source module I have written, I want to include as a header, a dynamically generated C source, that was created earlier in the build process.
Generating this file is not an issue. Including it, unfortunately, is.
What I have so far is (identities.h):
// identities.h
# define PASTER2(str) #str
# define PASTER(str) PASTER2(str ## .iden)
# define EVALUATOR(x) PASTER(x)
# define IDENTITIES_FILE EVALUATOR(__FILE__)
# include IDENTITIES_FILE
Ideally, this would be used like so (main.c):
//main.c
# include "identities.h"
int main() {return 0;}
Which would be expanded in a single pass by the preprocessor before compilation to yield:
//main.c (preprocessed)
# include "main.c.iden"
int main() {return 0;}
The two levels of indirection I'm using (PASTER and EVALUATOR) are a result of this post.
Unfortunately, this is not working and I am left with the error:
obj/win32/dbg/main.o
In file included from main.c:1:0:
identities.h:42:1: error: #include expects "FILENAME" or <FILENAME>
I think the problem is that the include statement is missing quotes.. Any ideas?
What about BOOST_PP_STRINGIZE from the Boost Preprocessor library . It is specifically made to add quotes around a name.