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35 lines
1.0 KiB
Plaintext
35 lines
1.0 KiB
Plaintext
# unlinkat.m4 serial 2
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dnl Copyright (C) 2004-2017 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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# Written by Jim Meyering.
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AC_DEFUN([gl_FUNC_UNLINKAT],
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[
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AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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AC_CHECK_FUNCS_ONCE([unlinkat])
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AC_REQUIRE([gl_FUNC_UNLINK])
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AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
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if test $ac_cv_func_unlinkat = no; then
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HAVE_UNLINKAT=0
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else
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case "$gl_cv_func_lstat_dereferences_slashed_symlink" in
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*no)
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# Solaris 9 has *at functions, but uniformly mishandles trailing
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# slash in all of them.
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REPLACE_UNLINKAT=1
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;;
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*)
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# GNU/Hurd has unlinkat, but it has the same bug as unlink.
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# Darwin has unlinkat, but it has the same UNLINK_PARENT_BUG.
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if test $REPLACE_UNLINK = 1; then
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REPLACE_UNLINKAT=1
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fi
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;;
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esac
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fi
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])
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