Eclipse CDT indexer cannot resolve ae_f32 type

Question

While trying to port floating-point C code to a fixed-point code, I came accross a problem in Eclipse CDT - indexer does not recognize f32 type which I am using to replace standard C float. The code compiles and builds fine (using MinGW GCC compiler). It's a mixture of C and C++ code.

It is annoying to see hundreds of warnings in Eclipse: Type f32 could not be resolved. This is how the type is defined in the 3rd party DSP library code:

#define B_(X) b_##X
... 
#define f32 B_(f32) 
... 
/* type declarations */

#define DECLARE_TYPE(s) \
    namespace s##_space { \
    class s##_; \
    } \
    typedef s##_space::s##_ s;
... 
DECLARE_TYPE(f32);
...
namespace f32_space 
{
    //etc...

Why wouldn't f32 type be recognized?

This works for me (or at least an approximate version of what you have put in here). Can you edit to make it minimal reproducible example? (To be specific, ae_f32 works, but ae_f32x2 does not, however the latter has no declaration in your question.) — Jonah Graham
Sorry, can't do compelte example... What do you mean by "works for me"? Eclipse doesn't report Type ae_f32 could not be resolved? ae_f32x2 is not important, only ae_f32 is. — Danijel
Yes, If I cut down your example and stick it in a new C++ project it just works for ae_f32. This is what I used in my cutdown: pastebin.com/KfmpEsbX — Jonah Graham
Maybe the problem is the size of include file? The .h file has more than 30.000 lines. — Danijel

Danijel Danijel · Accepted Answer · 2017-01-26T09:05:02

Resolved it.

The problem was mixture of C and C++ in .c files. I have sources with .c extension that have ifdefed C++ code (#if defined(__cplusplus) etc), and also compiler is set to C++. Indexer however parses those files as C. When I generated indexer log file (Project\C C++ Index\Create Parser Log File), I noticed the following: Language: GNU C.

Then I added language mappings:

Settings\C C++ General\Language Mappings

C Header file map to C++
C Source file map to C++

Once I changed this, it works.

Eclipse CDT indexer cannot resolve ae_f32 type

1 Answers