Re: Problem installing extensions on Lion

>>> 1) Do the above files actually exist in the above location?
>
>> Yes, the c.h exist in the mentioned location. However, as it does not indicate where it looks for the stdio.h, perhaps the problem lies there.
>
> Indeed. Where did you get the advice to use "-isysroot
> /Developer/SDKs/MacOSX10.6.sdk"? According to the gcc manual,
> that means
>
> Use DIR as the logical root directory for headers and libraries.
> For example, if the compiler would normally search for headers in
> `/usr/include' and libraries in `/usr/lib', it will instead search
> `DIR/usr/include' and `DIR/usr/lib'.
>
> So basically, that breaks every attempt to use a standard header from
> /usr/include, unless the SDK has provided a substitute, which evidently
> it mostly doesn't.
>
> [ pokes around on own Mac... ] Hmm, for me the file
> /Developer/SDKs/MacOSX10.6.sdk/usr/include/stdio.h
> does exist with reasonably sane-looking contents. So maybe your problem
> is a broken SDK installation.

Just as an information: It's really the Xcode which is placed now in /Applications, instead of /Developer. I copied over my older version of Xcode to the /Developer directory, and the compilation worked fine...