Drop libtool from llvm.

We were only using it so find the shared library extension and nm. There are
simpler ways to do those things :-)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202524 91177308-0d34-0410-b5e6-96231b3b80d8

autoconf/AutoRegen.sh

@@ -17,7 +17,6 @@ clean() {
 want_autoconf_version='2\.60'
 want_autoheader_version=$want_autoconf_version
 want_aclocal_version='1\.9\.6'
-want_libtool_version='1\.5\.22'
 ### END NOTE #########################################################
 
 outfile=configure
@@ -26,7 +25,6 @@ configfile=configure.ac
 want_autoconf_version_clean=$(clean $want_autoconf_version)
 want_autoheader_version_clean=$(clean $want_autoheader_version)
 want_aclocal_version_clean=$(clean $want_aclocal_version)
-want_libtool_version_clean=$(clean $want_libtool_version)
 
 test -d autoconf && test -f autoconf/$configfile && cd autoconf
 test -f $configfile || die "Can't find 'autoconf' dir; please cd into it first"
@@ -36,8 +34,6 @@ aclocal --version | grep '^aclocal.*'$want_aclocal_version > /dev/null
 test $? -eq 0 || die "Your aclocal was not detected as being $want_aclocal_version_clean"
 autoheader --version | grep '^autoheader.*'$want_autoheader_version > /dev/null
 test $? -eq 0 || die "Your autoheader was not detected as being $want_autoheader_version_clean"
-libtool --version | grep $want_libtool_version > /dev/null
-test $? -eq 0 || die "Your libtool was not detected as being $want_libtool_version_clean"
 echo ""
 echo "### NOTE: ############################################################"
 echo "### If you get *any* warnings from autoconf below you MUST fix the"

autoconf/configure.ac

@@ -1235,12 +1235,10 @@ dnl=== SECTION 4: Check for programs we need and that they are the right version
 dnl===
 dnl===-----------------------------------------------------------------------===
 
-AC_PROG_NM
-AC_SUBST(NM)
-
 dnl Check for the tools that the makefiles require
 AC_CHECK_GNU_MAKE
 AC_PROG_LN_S
+AC_PATH_PROG(NM, [nm], [nm])
 AC_PATH_PROG(CMP, [cmp], [cmp])
 AC_PATH_PROG(CP, [cp], [cp])
 AC_PATH_PROG(DATE, [date], [date])
@@ -1386,11 +1384,15 @@ AC_LINK_EXPORT_DYNAMIC
 dnl Determine whether the linker supports the --version-script option.
 AC_LINK_VERSION_SCRIPT
 
-dnl Check for libtool and the library that has dlopen function (which must come
-dnl before the AC_PROG_LIBTOOL check in order to enable dlopening libraries with
-dnl libtool).
-AC_LIBTOOL_DLOPEN
-AC_LIB_LTDL
+AC_CHECK_HEADERS([errno.h])
+
+case "$llvm_cv_os_type" in
+  Cygwin|MingW|Win32) llvm_shlib_ext=.dll ;;
+  Darwin) llvm_shlib_ext=.dylib ;;
+  *) llvm_shlib_ext=.so ;;
+esac
+
+AC_DEFINE_UNQUOTED([LTDL_SHLIB_EXT], ["$llvm_shlib_ext"], [The shared library extension])
 
 AC_MSG_CHECKING([tool compatibility])
 
@@ -1900,7 +1902,7 @@ AC_CHECK_FUNCS([__dso_handle])
 
 dnl Propagate the shared library extension that the libltdl checks did to
 dnl the Makefiles so we can use it there too
-AC_SUBST(SHLIBEXT,$libltdl_cv_shlibext)
+AC_SUBST(SHLIBEXT,$llvm_shlib_ext)
 
 dnl Translate the various configuration directories and other basic
 dnl information into substitutions that will end up in Makefile.config.in