[Bug nscd/13696] New: Add a --disable-nscd option to configure for disabling nscd implementation in glibc functions

["benchan at chromium dot org" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=13696

             Bug #: 13696
           Summary: Add a --disable-nscd option to configure for disabling
                    nscd implementation in glibc functions
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: nscd
        AssignedTo: drepper.fsp@gmail.com
        ReportedBy: benchan@chromium.org
    Classification: Unclassified


Created attachment 6214
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6214
Patch to add --disable-nscd to configure

Background
----------
Although the nscd client code can fall back when it fails to contact the nscd
server, we may sometimes need to avoid that from happening (e.g. we need to
disallow the "socket" system call in a sandboxed environment) if we know that
no nscd server is enabled on a target system. Thus, we need to compile glibc
without using the nscd implementation in its functions. 

Problem
-------
The following glibc Makefiles currently hardcode -DUSE_NSCD=1 to use the nscd
implementation for certain glibc functions, which makes it inconvenient to
disable the nscd implementation.

  grp/Makefile
  inet/Makefile
  posix/Makefile
  pwd/Makefile

Proposed Solution
-----------------
It would be nicer if we have a --disable-nscd option in configure to control
whether USE_NSCD should be defined. The attached patch implements the proposed
changes on top of the current glibc master branch.

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