missing definition of GL_LINK_WARNING

[Bruno Haible]

GL_LINK_WARNING is used in arpa_inet.in.h and inet.in.h. So it needs the
appropriate autoconf/makefile infrastructure. I'm applying this:

2008-09-27  Bruno Haible  <address@hidden>

        * lib/arpa_inet.in.h: Include the GL_LINK_WARNING anchor.
        * modules/arpa_inet (Depends-on): Add link-warning.
        (Makefile.am): Insert the definition of GL_LINK-WARNING.
        * modules/unistd (Makefile.am): Likewise.

*** lib/arpa_inet.in.h.orig     2008-09-27 17:51:59.000000000 +0200
--- lib/arpa_inet.in.h  2008-09-27 15:52:41.000000000 +0200
***************
*** 34,39 ****
--- 34,41 ----
  #ifndef _GL_ARPA_INET_H
  #define _GL_ARPA_INET_H
  
+ /* The definition of GL_LINK_WARNING is copied here.  */
+ 
  #if @GNULIB_INET_NTOP@
  # if address@hidden@
  /* Converts an internet address from internal format to a printable,
*** modules/arpa_inet.orig      2008-09-27 17:51:59.000000000 +0200
--- modules/arpa_inet   2008-09-27 15:54:56.000000000 +0200
***************
*** 7,12 ****
--- 7,13 ----
  
  Depends-on:
  include_next
+ link-warning
  sys_socket
  
  configure.ac:
***************
*** 30,35 ****
--- 31,37 ----
              -e 's|@''GNULIB_INET_PTON''@|$(GNULIB_INET_PTON)|g' \
              -e 's|@''HAVE_DECL_INET_NTOP''@|$(HAVE_DECL_INET_NTOP)|g' \
              -e 's|@''HAVE_DECL_INET_PTON''@|$(HAVE_DECL_INET_PTON)|g' \
+             -e '/definition of GL_LINK_WARNING/r $(LINK_WARNING_H)' \
              < $(srcdir)/arpa_inet.in.h; \
        } > address@hidden
        mv address@hidden $@
*** modules/unistd.orig 2008-09-27 17:51:59.000000000 +0200
--- modules/unistd      2008-09-27 15:54:57.000000000 +0200
***************
*** 54,59 ****
--- 54,60 ----
              -e 's|@''REPLACE_LCHOWN''@|$(REPLACE_LCHOWN)|g' \
              -e 's|@''REPLACE_LSEEK''@|$(REPLACE_LSEEK)|g' \
              -e 's|@''REPLACE_WRITE''@|$(REPLACE_WRITE)|g' \
+             -e '/definition of GL_LINK_WARNING/r $(LINK_WARNING_H)' \
              < $(srcdir)/unistd.in.h; \
        } > address@hidden
        mv address@hidden $@