Add missing -lpthread to the linking arguments of liblustreapi.a Index: lustre/lustre/tests/Makefile.am =================================================================== --- lustre.orig/lustre/tests/Makefile.am 2011-03-17 11:19:36.220315409 +0100 +++ lustre/lustre/tests/Makefile.am 2011-03-17 11:21:06.120761199 +0100 @@ -61,7 +61,7 @@ mmap_sanity_SOURCES= mmap_sanity.c LIBLUSTREAPI := $(top_builddir)/lustre/utils/liblustreapi.a -multiop_LDADD=$(LIBLUSTREAPI) -lrt +multiop_LDADD=$(LIBLUSTREAPI) -lrt -lpthread ll_dirstripe_verify_SOURCES= ll_dirstripe_verify.c ll_dirstripe_verify_LDADD= -L$(top_builddir)/lustre/utils -llustreapi