| # serial 14 |
| # See if we need to provide fdopendir. |
| |
| dnl Copyright (C) 2009-2021 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_FDOPENDIR], |
| [ |
| AC_REQUIRE([gl_DIRENT_H_DEFAULTS]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| |
| AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) |
| |
| dnl FreeBSD 7.3 has the function, but failed to declare it. |
| AC_CHECK_DECLS([fdopendir], [], [HAVE_DECL_FDOPENDIR=0], [[ |
| #include <dirent.h> |
| ]]) |
| AC_CHECK_FUNCS_ONCE([fdopendir]) |
| if test $ac_cv_func_fdopendir = no; then |
| HAVE_FDOPENDIR=0 |
| else |
| AC_CACHE_CHECK([whether fdopendir works], |
| [gl_cv_func_fdopendir_works], |
| [AC_RUN_IFELSE( |
| [AC_LANG_PROGRAM([[ |
| #include <dirent.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| ]GL_MDA_DEFINES[ |
| #if !HAVE_DECL_FDOPENDIR |
| extern |
| # ifdef __cplusplus |
| "C" |
| # endif |
| DIR *fdopendir (int); |
| #endif |
| ]], |
| [[int result = 0; |
| int fd = open ("conftest.c", O_RDONLY); |
| if (fd < 0) result |= 1; |
| if (fdopendir (fd)) result |= 2; |
| if (close (fd)) result |= 4; |
| return result; |
| ]])], |
| [gl_cv_func_fdopendir_works=yes], |
| [gl_cv_func_fdopendir_works=no], |
| [case "$host_os" in |
| # Guess yes on glibc systems. |
| *-gnu*) gl_cv_func_fdopendir_works="guessing yes" ;; |
| # Guess yes on musl systems. |
| *-musl*) gl_cv_func_fdopendir_works="guessing yes" ;; |
| # If we don't know, obey --enable-cross-guesses. |
| *) gl_cv_func_fdopendir_works="$gl_cross_guess_normal" ;; |
| esac |
| ])]) |
| case "$gl_cv_func_fdopendir_works" in |
| *yes) ;; |
| *) |
| REPLACE_FDOPENDIR=1 |
| ;; |
| esac |
| fi |
| ]) |
