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Postings from March 2007
On 23/02/07, Rafael Garcia-Suarez <rgarciasuarez@gmail.com> wrote:
> > As NPTL is the default for modern Linux (2.6), this patch seems
> > reasonable.
> > Older Linux distributions could simply readd the -DTHREADS_HAVE_PIDS
> > hint
> > to their compile flags.
>
> What about testing the threading model in the hints file with
> something like getconf GNU_LIBPTHREAD_VERSION ? Well, that's not
> perfect either, since you can run perl with a different kernel than
> the one you've compiled it with...
I've now commited this after some testing.
Change 30758 by rgs@stcosmo on 2007/03/26 10:09:21
On Linux, don't compile with -DTHREADS_HAVE_PIDS if the
kernel uses the NPTL threading model
Affected files ...
... //depot/perl/hints/linux.sh#64 edit
Differences ...
==== //depot/perl/hints/linux.sh#64 (text) ====
@@ -308,9 +308,15 @@
# This script UU/usethreads.cbu will get 'called-back' by Configure
# after it has prompted the user for whether to use threads.
cat > UU/usethreads.cbu <<'EOCBU'
+if getconf GNU_LIBPTHREAD_VERSION | grep NPTL >/dev/null 2>/dev/null
+then
+ threadshavepids=""
+else
+ threadshavepids="-DTHREADS_HAVE_PIDS"
+fi
case "$usethreads" in
$define|true|[yY]*)
- ccflags="-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS $ccflags"
+ ccflags="-D_REENTRANT -D_GNU_SOURCE $threadshavepids $ccflags"
if echo $libswanted | grep -v pthread >/dev/null
then
set `echo X "$libswanted "| sed -e 's/ c / pthread c /'`
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