pthreads configure warning for glib-1.2.8 in pkg-config-0.21

[Chris Pickett]

Hi,

I got this warning when configuring the glib-1.2.8 subdirectory of 
pkg-config-0.21 on AIX 5.2:

checking pthread.h usability... yes
checking pthread.h presence... yes
checking for pthread.h... yes
checking for thread implementation... posix
checking for pthread_attr_init in -lpthread... yes
checking necessary linker options... -lpthread
configure: WARNING: I can't find the MACRO, that enables thread safety
on your
                 platform (normaly it's _REENTRANT). I'll not use any 
flag on
                 compilation now, but then your programs might not work.
                 Please provide information on how it is done on your 
system.

I haven't encountered any bugs as a result, and I don't know how to fix 
the problem, but I thought I would send a message about it to the list 
in case it's useful to somebody.

Chris