https://bugs.gentoo.org/778371

From: orbea <orbea@riseup.net>
Date: Sat, 18 Jun 2022 20:49:52 -0700
Subject: [PATCH] configure: Use LT_INIT to find libtool

LT_INIT will generate libtool for the build which is required by
rlibtool to determine if building shared or static libraries.

--- a/Makefile.in
+++ b/Makefile.in
@@ -37,6 +37,11 @@
 srcdir = @srcdir@
 VPATH = @srcdir@
 
+#
+# directory containing the build
+#
+top_builddir = @top_builddir@
+
 #
 # the name of the install program to use
 #
--- a/configure.ac
+++ b/configure.ac
@@ -22,7 +22,7 @@ AC_PROG_CC
 AC_CANONICAL_HOST
 AC_GNU_SOURCE
 AC_PROG_INSTALL
-AC_PROG_RANLIB
+LT_INIT
 AC_CHECK_PROGS(AR, ar)
 
 AC_USE_SYSTEM_EXTENSIONS
@@ -32,6 +32,8 @@ AC_ISC_POSIX
 AC_OBJEXT
 AC_EXEEXT
 
+AC_SUBST([top_builddir], [$abs_builddir])
+
 dnl @synopsis AC_ADD_CFLAGS
 dnl
 dnl Add the given option to CFLAGS, if it doesn't break the compiler
@@ -53,37 +55,6 @@ AC_ADD_CFLAGS(-Wshadow)
 dnl! AC_ADD_CFLAGS(-Werror)
 dnl! AC_ADD_CFLAGS([-Wl,--as-needed])
 
-AC_CHECK_PROGS(LIBTOOL, libtool)
-
-if test -z "$LIBTOOL"
-then
-  AC_MSG_RESULT([
-        You must have GNU Libtool installed to build fstrcmp.
-        Homepage: http://www.gnu.org/software/libtool/])
-  OK=no
-  if apt-get --version > /dev/null 2> /dev/null; then
-    AC_MSG_RESULT([
-        The following command may be used to install it:
-        sudo apt-get install libtool
-    ])
-    OK=yes
-  fi
-  if yum --version > /dev/null 2> /dev/null; then
-    AC_MSG_RESULT([
-        The following command may be used to install it:
-        sudo yum install libtool
-    ])
-    OK=yes
-  fi
-  if test "$OK" != "yes"; then
-    AC_MSG_RESULT([
-        If you are using a package based install, you will need the
-        libtool package.
-    ])
-  fi
-  exit 1
-fi
-
 AC_CHECK_PROGS(GROFF, groff roff)
 AC_CHECK_PROGS(SOELIM, gsoelim soelim)
 AC_CHECK_PROGS(REFER, refer grefer)