libstdc++: Update AC_FOREACH to m4_foreach_w [PR103459]

AC_FOREACH has been deprecated by Autoconf.  Update to
m4_foreach_w.  No changes to generated files.

	PR bootstrap/103459

libstdc++-v3/ChangeLog:

	* configure.ac: Update AC_FOREACH to m4_foreach_w.

Signed-off-by: Pietro Monteiro <pietro@sociotechnical.xyz>

diff --git a/libstdc++-v3/configure.ac b/libstdc++-v3/configure.ac
index c442d068e7a7b891941596ca93122f781bfad5ba..db08de7735e4db711889dd0f00032041320d7741 100644 (file)
--- a/libstdc++-v3/configure.ac
+++ b/libstdc++-v3/configure.ac
@@ -802,7 +802,7 @@ AC_CONFIG_FILES([src/libbacktrace/backtrace-supported.h])
 # append it here.  Only modify Makefiles that have just been created.
 #
 # Also, get rid of this simulated-VPATH thing that automake does.
-AC_CONFIG_FILES(AC_FOREACH([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),
+AC_CONFIG_FILES(m4_foreach_w([DIR], glibcxx_SUBDIRS, [DIR/Makefile ]),
   [cat > vpsed$$ << \_EOF
 s!`test -f '$<' || echo '$(srcdir)/'`!!
 _EOF