For IRIX 6.3 and 6.4 the pthreads should work out of the box.
Thanks to Hannu Napari <Hannu.Napari@hut.fi> for the IRIX
pthreads patches information.
+For AIX:
+ Change cc to xlc_r or cc_r.
+ Add -DUSE_THREADS -DNEED_PTHREAD_INIT -DDEBUGGING to ccflags and cppflags
+ Change optimize to -g
+ Add -lc_r to libswanted
+ Change -lc in lddflags to be -lpthread -lc_r -lc
Now you can do a
make