Re: hwcap 0 nosegneg in FC6 ld.so.cache

[Christian Rössel]

Olly Betts <olly <at> survex.com> writes:

> 
> On 2007-06-19, Peter O'Gorman <peter <at> pogma.com> wrote:
> > I am inclined to vote for (1) for now. It might be worth a figuring out
> > how to have ldconfig (or some other utility) output the real search path
> > that the dynamic linker uses for the future, parsing ld.so.conf and
> > friends seems to be fragile, this is not the first time that it has had
> > problems.
> 
> That reminded me that I have this patch lying around, which I'd been
> meaning to put forward.
> 
> The motivation behind this was that libtool currently doesn't know about
> systems where ldconfig has extra default trusted directories (such as
> /usr/lib64) so libtool sets an rpath for libraries installed in these
> directories, which is against the policies of most Linux distros, and
> fixing this currently requires hackery in packaging scripts.  But it
> nicely solves this issue too.
> 
> Patch is against the 1.5 branch, because that's where I was trying
> this out, but if you think this approach is suitable for inclusion, I'm
> happy to update it for HEAD and try to provide a suitable ChangeLog
> entry.
> 
> Index: libtool.m4
> ===================================================================
> RCS file: /sources/libtool/libtool/Attic/libtool.m4,v
> retrieving revision 1.314.2.181
> diff -p -u -r1.314.2.181 libtool.m4
> --- libtool.m4        18 Jun 2007 02:07:45 -0000      1.314.2.181
> +++ libtool.m4        23 Jun 2007 14:37:02 -0000
>  <at>  <at>  -1618,10 +1618,10  <at>  <at>  linux* | k*bsd*-gnu)
>    # before this can be enabled.
>    hardcode_into_libs=yes
> 
> -  # Append ld.so.conf contents to the search path
> -  if test -f /etc/ld.so.conf; then
> -    lt_ld_extra=`awk '/^include / { system(sprintf("cd /etc; cat %s
2>/dev/null", \[$]2)); skip = 1; } { if
> (!skip) print \[$]0; skip = 0; }' < /etc/ld.so.conf | $SED -e
's/#.*//;s/[:,  ]/ /g;s/=[^=]*$//;s/=[^=
> ]* / /g;/^$/d' | tr '\n' ' '`
> -    sys_lib_dlsearch_path_spec="/lib /usr/lib $lt_ld_extra"
> +  # Extract search path from ldconfig
> +  ldconfig_search_path=`/sbin/ldconfig -N -X -v 2>/dev/null|sed
's,^\(/.*\):\( (.*)\)\?$,\1,p;d'`
> +  if test -n "$ldconfig_search_path"; then
> +    sys_lib_dlsearch_path_spec=$ldconfig_search_path
>    fi
> 
>    # We used to test for /lib/ld.so.1 and disable shared libraries on

On my system I have to replace the line feeds in the output of
/sbin/ldconfig by spaces, otherwise I end up with the following in
config.status:

sys_lib_dlsearch_path_spec='/usr/local/lib
/lib
/usr/lib
/lib/i686
/usr/lib/i486
/usr/lib/i586
/usr/lib/i686
/usr/lib/sse2
/lib/i686/cmov
/usr/lib/i686/cmov'

This will trigger a 'missing separator' error during make.

Here the original patch plus the line feed replacement applied to the
current HEAD:

diff --git a/m4/libtool.m4 b/m4/libtool.m4
index 4bc6b22..86a7ba6 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -2743,10 +2743,10 @@ linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
   # before this can be enabled.
   hardcode_into_libs=yes
 
-  # Append ld.so.conf contents to the search path
-  if test -f /etc/ld.so.conf; then
-    lt_ld_extra=`awk '/^include / { system(sprintf("cd /etc; cat %s
2>/dev/null", \[$]2)); skip = 1; } { if (!skip) print \[$]0; ski
-    sys_lib_dlsearch_path_spec="/lib /usr/lib $lt_ld_extra"
+  # Extract search path from ldconfig, see
https://lists.gnu.org/archive/html/libtool-patches/2010-06/msg00145.html
+  ldconfig_search_path=`/sbin/ldconfig -N -X -v 2>/dev/null|sed
's,^\(/.*\):\( (.*)\)\?$,\1,p;d' | tr '\n' ' '`
+  if test -n "$ldconfig_search_path"; then
+    sys_lib_dlsearch_path_spec=$ldconfig_search_path
   fi
 
   # We used to test for /lib/ld.so.1 and disable shared libraries on

Christian

> Cheers,
>     Olly
> 
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