[gcc r12-6895] libstdc++: fix typo in acinclude.m4.

[gcc r12-6895] libstdc++: fix typo in acinclude.m4.

[Martin Liska]

https://gcc.gnu.org/g:14f339894db6ca7fe4772d5528c726694d2517c4

commit r12-6895-g14f339894db6ca7fe4772d5528c726694d2517c4
Author: Martin Liska <mliska@suse.cz>
Date:   Thu Jan 27 14:47:23 2022 +0100

    libstdc++: fix typo in acinclude.m4.
    
            PR libstdc++/104259
    
    libstdc++-v3/ChangeLog:
    
            * acinclude.m4: Fix typo.
            * configure: Regenerate.

Diff:
---
 libstdc++-v3/acinclude.m4 | 2 +-
 libstdc++-v3/configure    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index 7b6b807114a..a93252076b9 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -4744,7 +4744,7 @@ dnl
       [glibcxx_cv_fdopendir=yes],
       [glibcxx_cv_fdopendir=no])
   ])
-  if test $glibcxx_cv_truncate = yes; then
+  if test $glibcxx_cv_fdopendir = yes; then
     AC_DEFINE(HAVE_FDOPENDIR, 1, [Define if fdopendir is available in <dirent.h>.])
   fi
 dnl
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 5c6e51f5c11..2b2f85782b1 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -77080,7 +77080,7 @@ fi
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_fdopendir" >&5
 $as_echo "$glibcxx_cv_fdopendir" >&6; }
-  if test $glibcxx_cv_truncate = yes; then
+  if test $glibcxx_cv_fdopendir = yes; then
 
 $as_echo "#define HAVE_FDOPENDIR 1" >>confdefs.h