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-rw-r--r--m4/opendir.m432
1 files changed, 32 insertions, 0 deletions
diff --git a/m4/opendir.m4 b/m4/opendir.m4
new file mode 100644
index 0000000..fd3c1ec
--- /dev/null
+++ b/m4/opendir.m4
@@ -0,0 +1,32 @@
+# opendir.m4 serial 5
+dnl Copyright (C) 2011-2020 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_OPENDIR],
+[
+ AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+ AC_CHECK_FUNCS([opendir])
+ if test $ac_cv_func_opendir = no; then
+ HAVE_OPENDIR=0
+ fi
+ dnl Replace opendir() for supporting the gnulib-defined fchdir() function,
+ dnl to keep fchdir's bookkeeping up-to-date.
+ m4_ifdef([gl_FUNC_FCHDIR], [
+ gl_TEST_FCHDIR
+ if test $HAVE_FCHDIR = 0; then
+ if test $HAVE_OPENDIR = 1; then
+ REPLACE_OPENDIR=1
+ fi
+ fi
+ ])
+ dnl Replace opendir() on OS/2 kLIBC to support dirfd() function replaced
+ dnl by gnulib.
+ case $host_os,$HAVE_OPENDIR in
+ os2*,1)
+ REPLACE_OPENDIR=1;;
+ esac
+])