Maint: gnulib: Update gnulib for build changes.

Now that we are using gnulib's own build stuff, including libtool, we
need to update various macros to reflect those changes.  These changes
would also be done by running "make gnulib-update", but that would also
update all the other gnulib stuff which seems like too much for the
moment.  It's easy enough to apply by hand.

This was originally written by Jan Pokorný as part of
#1756.

lib/gnu/Makefile.am

@@ -31,7 +31,7 @@
 #  --aux-dir=. \
 #  --lgpl=2 \
 #  --no-conditional-dependencies \
-#  --no-libtool \
+#  --libtool \
 #  --macro-prefix=gl \
 #  --no-vc-files \
 #  --avoid=stdint \
@@ -56,12 +56,15 @@ MAINTAINERCLEANFILES =
 AM_CPPFLAGS =
 AM_CFLAGS =
 
-noinst_LIBRARIES += libgnu.a
+noinst_LTLIBRARIES += libgnu.la
 
-libgnu_a_SOURCES =
-libgnu_a_LIBADD = $(gl_LIBOBJS)
-libgnu_a_DEPENDENCIES = $(gl_LIBOBJS)
-EXTRA_libgnu_a_SOURCES =
+libgnu_la_SOURCES =
+libgnu_la_LIBADD = $(gl_LTLIBOBJS)
+libgnu_la_DEPENDENCIES = $(gl_LTLIBOBJS)
+EXTRA_libgnu_la_SOURCES =
+libgnu_la_LDFLAGS = $(AM_LDFLAGS)
+libgnu_la_LDFLAGS += -no-undefined
+libgnu_la_LDFLAGS += $(LIB_CRYPTO)
 
 ## begin gnulib module byteswap
 
@@ -88,7 +91,7 @@ EXTRA_DIST += byteswap.in.h
 
 ## begin gnulib module crypto/md5-buffer
 
-libgnu_a_SOURCES += md5.c
+libgnu_la_SOURCES += md5.c
 
 EXTRA_DIST += gl_openssl.h md5.h
 

m4/gnulib-cache.m4

@@ -36,7 +36,7 @@
 #  --aux-dir=. \
 #  --lgpl=2 \
 #  --no-conditional-dependencies \
-#  --no-libtool \
+#  --libtool \
 #  --macro-prefix=gl \
 #  --no-vc-files \
 #  --avoid=stdint \
@@ -56,6 +56,7 @@ gl_TESTS_BASE([tests])
 gl_LIB([libgnu])
 gl_LGPL([2])
 gl_MAKEFILE_NAME([])
+gl_LIBTOOL
 gl_MACRO_PREFIX([gl])
 gl_PO_DOMAIN([])
 gl_WITNESS_C_MACRO([])

m4/gnulib-comp.m4

@@ -53,10 +53,8 @@ AC_DEFUN([gl_EARLY],
 # "Check for header files, types and library functions".
 AC_DEFUN([gl_INIT],
 [
-  AM_CONDITIONAL([GL_COND_LIBTOOL], [false])
-  gl_cond_libtool=false
-  gl_libdeps=
-  gl_ltlibdeps=
+  AM_CONDITIONAL([GL_COND_LIBTOOL], [true])
+  gl_cond_libtool=true
   gl_m4_base='m4'
   m4_pushdef([AC_LIBOBJ], m4_defn([gl_LIBOBJ]))
   m4_pushdef([AC_REPLACE_FUNCS], m4_defn([gl_REPLACE_FUNCS]))
@@ -147,10 +145,6 @@ changequote([, ])dnl
     AC_SUBST([gltests_LIBOBJS], [$gltests_libobjs])
     AC_SUBST([gltests_LTLIBOBJS], [$gltests_ltlibobjs])
   ])
-  LIBGNU_LIBDEPS="$gl_libdeps"
-  AC_SUBST([LIBGNU_LIBDEPS])
-  LIBGNU_LTLIBDEPS="$gl_ltlibdeps"
-  AC_SUBST([LIBGNU_LTLIBDEPS])
 ])
 
 # Like AC_LIBOBJ, except that the module name goes