conflicting with my own String.h

Question

I have a project that was compiling ok within g++(I can\'t see the version right now) and now on xCode it is not.
I think that I got the problem now... I have a String.h

Answer 1

Two things you're running into:

1. As noted above, the filesystem on Mac OS is case-insensitive unless you specifically set up your filesystem to be case-sensitive.
2. gcc does not distinguish all that much between local and system header include paths. When you specify a directory to be added to the path via -I, that directory will be used to locate both local and system includes. Only when you use -iquote or -I- does a directory get skipped for locating system includes. Further, the builtin "system include" directories on the compiler's search path are always searched for local includes.
   • Note that the current directory is used for local but not system includes. In this case, I believe it's picking up String.h because the project settings explicitly add the top-level project directory to the include path.

The workaround I would suggest, rather than renaming your includes, is to put your utilities into a directory whose name is unique for your project, and specify that directory in your include directive. For example:

#include "Josk/String.h"

and make sure Josk/ itself isn't in your include search path. This way you aren't stuck with an awkward rename, though you may have to shuffle some files around in your project. You may also need to edit your project settings to make sure the parent directory of that utility directory is in your include path.

Another possibility to try is, if you see the top-level project directory added to your project's include path, remove it. This ought to keep items in your top-level project directory from being searched for system includes.

Finally, you may also be able to avoid this problem in this specific case by changing the case sensitivity of your file system. This can break some Mac applications, though, so research the issue before you embark on this – or pick a volume that nothing else is using.