Adjust documentation

diff --git a/libtool.m4 b/libtool.m4
index 955d8b593451d27d8def76cce02394c614f716df..c41d84aa471080a60ed52dc3fc6e1fd924971061 100644 (file)
--- a/libtool.m4
+++ b/libtool.m4
@@ -371,13 +371,15 @@ esac
 ])
 
 # AC_LIBLTDL_CONVENIENCE[(dir)] - sets LIBLTDL to the link flags for
-# the libltdl convenience library, adds --enable-ltdl-convenience to
-# the configure arguments.  Note that LIBLTDL is not AC_SUBSTed, nor
-# is AC_CONFIG_SUBDIRS called.  If DIR is not provided, it is assumed
-# to be `${top_builddir}/libltdl'.  Make sure you start DIR with
-# '${top_builddir}/' (note the single quotes!) if your package is not
-# flat, and, if you're not using automake, define top_builddir as
-# appropriate in the Makefiles.
+# the libltdl convenience library and INCLTDL to the include flags for
+# the libltdl header and adds --enable-ltdl-convenience to the
+# configure arguments.  Note that LIBLTDL and INCLTDL are not
+# AC_SUBSTed, nor is AC_CONFIG_SUBDIRS called.  If DIR is not
+# provided, it is assumed to be `libltdl'.  LIBLTDL will be prefixed
+# with '${top_builddir}/' and INCLTDL will be prefixed with
+# '${top_srcdir}/' (note the single quotes!).  If your package is not
+# flat and you're not using automake, define top_builddir and
+# top_srcdir appropriately in the Makefiles.
 AC_DEFUN(AC_LIBLTDL_CONVENIENCE, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
   case "$enable_ltdl_convenience" in
   no) AC_MSG_ERROR([this package needs a convenience libltdl]) ;;
@@ -389,13 +391,15 @@ AC_DEFUN(AC_LIBLTDL_CONVENIENCE, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
 ])
 
 # AC_LIBLTDL_INSTALLABLE[(dir)] - sets LIBLTDL to the link flags for
-# the libltdl installable library, and adds --enable-ltdl-install to
-# the configure arguments.  Note that LIBLTDL is not AC_SUBSTed, nor
-# is AC_CONFIG_SUBDIRS called.  If DIR is not provided, it is assumed
-# to be `${top_builddir}/libltdl'.  Make sure you start DIR with
-# '${top_builddir}/' (note the single quotes!) if your package is not
-# flat, and, if you're not using automake, define top_builddir as
-# appropriate in the Makefiles.
+# the libltdl installable library and INCLTDL to the include flags for
+# the libltdl header and adds --enable-ltdl-install to the configure
+# arguments.  Note that LIBLTDL and INCLTDL are not AC_SUBSTed, nor is
+# AC_CONFIG_SUBDIRS called.  If DIR is not provided and an installed
+# libltdl is not found, it is assumed to be `libltdl'.  LIBLTDL will
+# be prefixed with '${top_builddir}/' and INCLTDL will be prefixed
+# with '${top_srcdir}/' (note the single quotes!).  If your package is
+# not flat and you're not using automake, define top_builddir and
+# top_srcdir appropriately in the Makefiles.
 # In the future, this macro may have to be called after AC_PROG_LIBTOOL.
 AC_DEFUN(AC_LIBLTDL_INSTALLABLE, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
   AC_CHECK_LIB(ltdl, main,