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patches/glibc/ports-2.10.1/180-resolv-dynamic.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun Sep 12 23:51:25 2010 +0200 (2010-09-12)
changeset 2123 ff2181adbd28
permissions -rw-r--r--
cc/gcc: disable complibs if not selected

Force gcc to not link with some companion libraries when
there are not needed (because selected-out).

There is no option to tell gcc *not* to build the Graphite and/or
LTO stuff. They *will* be built if gcc finds the suitable companion
libraries. If we do not provide them, but the host has them, then
gcc *will* find them, and link with them.

Consider the following:
- host has suitable PPL and CLooG (eg. Debian Squeeze)
- user wants to build gcc>=4.4
- user de-selects GRAPHITE
- gcc will find the hosts PPL and CLooG, and will use them
- the user moves the toolchain to an older host that does
not have them (eg. Debian Lenny)
- the toolchain fails, when it was properly setup not to

So, explicitly tell gcc *not* to use unneeded companion libs.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 ripped from SuSE

     2 

     3 if /etc/resolv.conf is updated, then make sure applications

     4 already running get the updated information.

     5 

     6 http://bugs.gentoo.org/177416

     7 

     8 diff -durN glibc-2.10.1.orig/resolv/res_libc.c glibc-2.10.1/resolv/res_libc.c

     9 --- glibc-2.10.1.orig/resolv/res_libc.c	2009-02-07 05:27:42.000000000 +0100

    10 +++ glibc-2.10.1/resolv/res_libc.c	2009-11-13 00:49:59.000000000 +0100

    11 @@ -22,6 +22,7 @@

    12  #include <arpa/nameser.h>

    13  #include <resolv.h>

    14  #include <bits/libc-lock.h>

    15 +#include <sys/stat.h>

    16  

    17  

    18  /* The following bit is copied from res_data.c (where it is #ifdef'ed

    19 @@ -95,6 +96,20 @@

    20  __res_maybe_init (res_state resp, int preinit)

    21  {

    22  	if (resp->options & RES_INIT) {

    23 +		static time_t last_mtime, last_check;

    24 +		time_t now;

    25 +		struct stat statbuf;

    26 +		

    27 +		time (&now);

    28 +		if (now != last_check) {

    29 +			last_check = now;

    30 +			if (stat (_PATH_RESCONF, &statbuf) == 0 && last_mtime != statbuf.st_mtime) {

    31 +				last_mtime = statbuf.st_mtime;

    32 +				atomicinclock (lock);

    33 +				atomicinc (__res_initstamp);

    34 +				atomicincunlock (lock);

    35 +			}

    36 +		}

    37  		if (__res_initstamp != resp->_u._ext.initstamp) {

    38  			if (resp->nscount > 0)

    39  				__res_iclose (resp, true);
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