Description: Avoid a broken AC_TRY_EVAL macro
 As said in the Autoconf source, the AC_TRY_EVAL macro is dangerous and
 undocumented, and should not be used.
 In particular, the one related to nm yields binary data in the config.log
 file with dash, where "echo \\1" (echo with the argument \1) produces the
 control character ^A instead of the usual \1 with most shells (POSIX says
 that the result is implementation-defined). See:
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=910076
 This patch attempts to replace this AC_TRY_EVAL occurrence by code with
 similar behavior, but using $ECHO instead of echo in order to avoid the
 backslash issue.
Author: Vincent Lefevre <address@hidden>
Last-Updated: 2018-10-02

Index: libtool-2.4.6/m4/libtool.m4
===================================================================
--- libtool-2.4.6.orig/m4/libtool.m4
+++ libtool-2.4.6/m4/libtool.m4
@@ -4063,7 +4063,8 @@ _LT_EOF
   if AC_TRY_EVAL(ac_compile); then
     # Now try to grab the symbols.
     nlist=conftest.nm
-    if AC_TRY_EVAL(NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist) && test -s "$nlist"; then
+    $ECHO "$as_me:$LINENO: $NM conftest.$ac_objext | $lt_cv_sys_global_symbol_pipe > $nlist" >&AS_MESSAGE_LOG_FD
+    if eval "$NM" conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist 2>&AS_MESSAGE_LOG_FD && test -s "$nlist"; then
       # Try sorting and uniquifying the output.
       if sort "$nlist" | uniq > "$nlist"T; then
 	mv -f "$nlist"T "$nlist"