[Valgrind-users] Need a configure check for NPTL

[Julian S. <js...@ac...>]

Greetings, all.

I'm trying to add support to V for R H 9, and it nearly works.

I need a configure (autoconf, etc) check to establish whether 
V is being built on a system which uses NPTL (Native Posix
Threads Library) as opposed to the older LinuxThreads library.

So far R H 9 is the only distro I'm aware of that uses NPTL.

Problem is: I have a set of patches which does appear to make
V work on R H 9, but they break all other systems.  So I need
a configure test to distinguish NPTL-based systems from
LinuxThreads-based systems.

Anyone have a reliable check easily to hand?

J