derek.holloway
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68 lines
1.9 KiB
Plaintext
68 lines
1.9 KiB
Plaintext
# serial 14
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# See if we need to provide fdopendir.
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dnl Copyright (C) 2009-2022 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 Eric Blake.
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AC_DEFUN([gl_FUNC_FDOPENDIR],
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[
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AC_REQUIRE([gl_DIRENT_H_DEFAULTS])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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dnl FreeBSD 7.3 has the function, but failed to declare it.
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AC_CHECK_DECLS([fdopendir], [], [HAVE_DECL_FDOPENDIR=0], [[
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#include <dirent.h>
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]])
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AC_CHECK_FUNCS_ONCE([fdopendir])
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if test $ac_cv_func_fdopendir = no; then
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HAVE_FDOPENDIR=0
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else
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AC_CACHE_CHECK([whether fdopendir works],
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[gl_cv_func_fdopendir_works],
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[AC_RUN_IFELSE(
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[AC_LANG_PROGRAM([[
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#include <dirent.h>
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#include <fcntl.h>
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#include <unistd.h>
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]GL_MDA_DEFINES[
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#if !HAVE_DECL_FDOPENDIR
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extern
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# ifdef __cplusplus
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"C"
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# endif
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DIR *fdopendir (int);
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#endif
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]],
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[[int result = 0;
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int fd = open ("conftest.c", O_RDONLY);
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if (fd < 0) result |= 1;
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if (fdopendir (fd)) result |= 2;
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if (close (fd)) result |= 4;
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return result;
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]])],
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[gl_cv_func_fdopendir_works=yes],
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[gl_cv_func_fdopendir_works=no],
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[case "$host_os" in
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# Guess yes on glibc systems.
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*-gnu*) gl_cv_func_fdopendir_works="guessing yes" ;;
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# Guess yes on musl systems.
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*-musl*) gl_cv_func_fdopendir_works="guessing yes" ;;
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# If we don't know, obey --enable-cross-guesses.
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*) gl_cv_func_fdopendir_works="$gl_cross_guess_normal" ;;
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esac
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])])
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case "$gl_cv_func_fdopendir_works" in
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*yes) ;;
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*)
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REPLACE_FDOPENDIR=1
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;;
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esac
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fi
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])
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