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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:04:52 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:04:52 +0000 |
commit | 5e03c718f4e7ff13cb6834eda737c269ebed02ad (patch) | |
tree | bfad3f5be123f000fdb03e26400050dece33d72f /m4/fchdir.m4 | |
parent | Initial commit. (diff) | |
download | wget-5e03c718f4e7ff13cb6834eda737c269ebed02ad.tar.xz wget-5e03c718f4e7ff13cb6834eda737c269ebed02ad.zip |
Adding upstream version 1.21.3.upstream/1.21.3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'm4/fchdir.m4')
-rw-r--r-- | m4/fchdir.m4 | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/m4/fchdir.m4 b/m4/fchdir.m4 new file mode 100644 index 0000000..f85549a --- /dev/null +++ b/m4/fchdir.m4 @@ -0,0 +1,66 @@ +# fchdir.m4 serial 27 +dnl Copyright (C) 2006-2022 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. + +AC_DEFUN([gl_FUNC_FCHDIR], +[ + AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) + AC_REQUIRE([gl_DIRENT_H_DEFAULTS]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + + AC_CHECK_DECLS_ONCE([fchdir]) + if test $ac_cv_have_decl_fchdir = no; then + HAVE_DECL_FCHDIR=0 + fi + + AC_REQUIRE([gl_TEST_FCHDIR]) + if test $HAVE_FCHDIR = 0; then + AC_DEFINE([REPLACE_FCHDIR], [1], + [Define to 1 if gnulib's fchdir() replacement is used.]) + dnl We must also replace anything that can manipulate a directory fd, + dnl to keep our bookkeeping up-to-date. We don't have to replace + dnl fstatat, since no platform has fstatat but lacks fchdir. + AC_CACHE_CHECK([whether open can visit directories], + [gl_cv_func_open_directory_works], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#include <fcntl.h> + ]GL_MDA_DEFINES], + [[return open(".", O_RDONLY) < 0;]])], + [gl_cv_func_open_directory_works=yes], + [gl_cv_func_open_directory_works=no], + [case "$host_os" in + # Guess yes on Linux systems. + linux-* | linux) gl_cv_func_open_directory_works="guessing yes" ;; + # Guess yes on glibc systems. + *-gnu* | gnu*) gl_cv_func_open_directory_works="guessing yes" ;; + # Guess no on native Windows. + mingw*) gl_cv_func_open_directory_works="guessing no" ;; + # If we don't know, obey --enable-cross-guesses. + *) gl_cv_func_open_directory_works="$gl_cross_guess_normal" ;; + esac + ])]) + case "$gl_cv_func_open_directory_works" in + *yes) ;; + *) + AC_DEFINE([REPLACE_OPEN_DIRECTORY], [1], [Define to 1 if open() should +work around the inability to open a directory.]) + ;; + esac + fi +]) + +# Determine whether to use the overrides in lib/fchdir.c. +AC_DEFUN([gl_TEST_FCHDIR], +[ + AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) + AC_CHECK_FUNCS_ONCE([fchdir]) + if test $ac_cv_func_fchdir = no; then + HAVE_FCHDIR=0 + fi +]) + +# Prerequisites of lib/fchdir.c. +AC_DEFUN([gl_PREREQ_FCHDIR], [:]) |