isysroot and various headers

[Devang Patel]

On Jan 3, 2005, at 5:48 PM, Daniel Jacobowitz wrote:

> On Mon, Jan 03, 2005 at 05:08:58PM -0800, Devang Patel wrote:
>> Few weeks ago there was one discussion about isysroot. It allows user
>> to supply set of include headers some where else (other than
>> /usr/include). We have a requirement that requires compiler to find 
>> ALL
>> headers (including compiler headers) in isysroot path. Which means a
>> patch like following is needed. Does it match isysroot's intended use?
>> If yes, I'll schedule it for 4.1.
>
> No, definitely not.  This will break all sorts of normal setups, i.e.
> anything where the default configuration has a sysroot.
>
> --with-sysroot=/prefix/sys-root would cause 
> /prefix/lib/gcc/..../include
> to look for /prefix/sys-root/prefix/lib/gcc/..../include.
>
> I think you need to describe your "requirement" a bit better.

In one sentence, "Find ALL headers and libraries in SDK root".
Right now, when -isysroot points to SDK root, compiler searches for 
system
headers in SDK root instead of default system header path.

But, SDK root contains libraries, for example libstdc++, for the target 
SDK,
so it is expected that compiler also finds C++ STL headers from SDK 
root.

> Maybe
> you should be setting -iprefix too.


-
Devang