Bug 418456 - Incorrect Undefined Symbol if symbol was previously defined in another source file
Summary: Incorrect Undefined Symbol if symbol was previously defined in another source...
Status: NEW
Alias: None
Product: CDT
Classification: Tools
Component: cdt-indexer (show other bugs)
Version: 8.2.1   Edit
Hardware: PC Windows 7
: P3 normal (vote)
Target Milestone: ---   Edit
Assignee: Project Inbox CLA
QA Contact: Jonah Graham CLA
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-10-01 16:24 EDT by Joseph Henry CLA
Modified: 2020-09-04 15:26 EDT (History)
4 users (show)

See Also:

Attachments
Project for recreate the bug (9.11 KB, application/octet-stream)
2013-10-01 16:24 EDT, Joseph Henry CLA 		no flags Details
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Joseph Henry CLA 2013-10-01 16:24:27 EDT 
Created attachment 236022 [details]
Project for recreate the bug

Lets say I have file a.h

#ifndef A_H_
#define A_H_

#define SYMBOL 1

#endif

And file common.h

#ifndef COMMON_H_
#define COMMON_H_

#if !defined(SYMBOL)
#define SYMBOL 2
#endif

#define COMMON

#endif

If I have file a.c:

#include "a.h"

#include "common.h"

int* a = SYMBOL;

and b.c:

#include "common.h"

int* b = SYMBOL;

b.c will say the SYMBOL is undefined.

This does not matter whether or not it is in the form of #ifndef SYMBOL or #if !defined(SYMBOL)