1 files changed, 34 insertions, 0 deletions
diff --git a/m4/faccessat.m4 b/m4/faccessat.m4
new file mode 100644
index 0000000..0ba5b3b
--- /dev/null
+++ b/m4/faccessat.m4
@@ -0,0 +1,34 @@
+# serial 10
+# See if we need to provide faccessat replacement.
+
+dnl Copyright (C) 2009-2022 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.
+
+# Written by Eric Blake.
+
+AC_DEFUN([gl_FUNC_FACCESSAT],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
+
+  dnl Persuade glibc <unistd.h> to declare faccessat().
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_FUNCS_ONCE([faccessat])
+  if test $ac_cv_func_faccessat = no; then
+    HAVE_FACCESSAT=0
+  else
+    case $gl_cv_func_lstat_dereferences_slashed_symlink in
+      *yes) ;;
+      *)    REPLACE_FACCESSAT=1 ;;
+    esac
+  fi
+])
+
+# Prerequisites of lib/faccessat.c.
+AC_DEFUN([gl_PREREQ_FACCESSAT],
+[
+  AC_CHECK_FUNCS([access])
+])