--- #Makefile~  Wed Oct 20 15:59:20 2004
+++ Makefile    Wed Oct 20 15:59:20 2004
@@ -11,7 +11,8 @@
  slony_top_builddir = ../..
  include $(slony_top_builddir)/Makefile.global

-CFLAGS += -I$(slony_top_builddir) 
-I$(PGSOURCETREE)/src/interfaces/libpq -DPGSHARE="\"$(datadir)\""
+CC = $(PTHREAD_CC)
+CFLAGS +=  $(PTHREAD_CFLAGS) -I$(slony_top_builddir) 
-I$(PGSOURCETREE)/src/interfaces/libpq -DPGSHARE="\"$(datadir)\""
  override LDFLAGS += $(rpath) -L$(PGSOURCETREE)/src/interfaces/libpq 
-lpq
  ifeq ($(PORTNAME), aix)
    CFLAGS += -D_LARGE_FILES



also, I note that slon/Makefile adds -g to CFLAGS while slonik/Makefile 
doesn't.