Index: configure.in
===================================================================
--- configure.in	(révision 1065)
+++ configure.in	(copie de travail)
@@ -2775,14 +2775,28 @@
 ])
 
 AC_MSG_CHECKING(for flock)
+have_flock=no
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/file.h>
 ]], [[void* p = flock]])],
   [AC_DEFINE(HAVE_FLOCK, 1, Define if you have the 'flock' function.)
-   AC_MSG_RESULT(yes)],
-  [AC_MSG_RESULT(no)
+   have_flock=yes
 ])
+AC_MSG_RESULT($have_flock)
 
+if test "$have_flock" = yes ; then
+  AC_MSG_CHECKING(if flock requires additional libraries.)
+  AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+  #include <sys/file.h>
+  ]], [[void *p = flock; flock(0, 0)]])],
+    [AC_MSG_RESULT(no)],
+    [AC_MSG_RESULT(yes)
+     AC_CHECK_LIB(bsd,flock, [
+      AC_DEFINE(FLOCK_NEEDS_LIBBSD, 1, Define if flock needs to be linked with bsd library.)
+      ])
+  ])
+fi
+
 AC_MSG_CHECKING(for getpagesize)
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <unistd.h>
Index: setup.py
===================================================================
--- setup.py	(révision 1059)
+++ setup.py	(copie de travail)
@@ -529,7 +529,11 @@
         # supported...)
 
         # fcntl(2) and ioctl(2)
-        exts.append( Extension('fcntl', ['fcntlmodule.c']) )
+        libs = []
+        if (config_h_vars.get('FLOCK_NEEDS_LIBBSD', False)):
+            # May be necessary on AIX for flock function
+            libs = ['bsd']
+        exts.append( Extension('fcntl', ['fcntlmodule.c'], libraries=libs) )
         # pwd(3)
         exts.append( Extension('pwd', ['pwdmodule.c']) )
         # grp(3)