With this option, include files can be added recursively from
subdirectories of include paths as well.

This test suite implements various test cases intended to test
the parsing of C programs that include header files. Each test
case modifies the CDT parser settings for an automatic test setup
to check the different include path configurations.

(separated by ";")

This patch fixes the C preprocessor to support the parsing and
substitution of the following macros:

  - #define
  - #undef
  - #if
  - #ifdef
  - #ifndef
  - #elif
  - #else
  - #endif
  - #error

Note that ACSL expressions cannot contain macros, as these are in
comments where parsing and substitution is not possible.