diff options
Diffstat (limited to 'm4/fcntl.m4')
| -rw-r--r-- | m4/fcntl.m4 | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/m4/fcntl.m4 b/m4/fcntl.m4 index 5481cae4..f824beb6 100644 --- a/m4/fcntl.m4 +++ b/m4/fcntl.m4 @@ -1,5 +1,5 @@ # fcntl.m4 serial 5 -dnl Copyright (C) 2009-2013 Free Software Foundation, Inc. +dnl Copyright (C) 2009-2014 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. @@ -19,7 +19,7 @@ AC_DEFUN([gl_FUNC_FCNTL], AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) AC_REQUIRE([gl_FCNTL_H_DEFAULTS]) AC_REQUIRE([AC_CANONICAL_HOST]) - AC_CHECK_FUNCS_ONCE([fcntl]) + AC_CHECK_FUNCS_ONCE([fcntl getdtablesize]) if test $ac_cv_func_fcntl = no; then gl_REPLACE_FCNTL else @@ -28,11 +28,21 @@ AC_DEFUN([gl_FUNC_FCNTL], AC_CACHE_CHECK([whether fcntl handles F_DUPFD correctly], [gl_cv_func_fcntl_f_dupfd_works], [AC_RUN_IFELSE([AC_LANG_PROGRAM([[ +#ifdef HAVE_GETDTABLESIZE +# include <unistd.h> +#endif #include <fcntl.h> #include <errno.h> ]], [[int result = 0; +#ifdef HAVE_GETDTABLESIZE + int bad_fd = getdtablesize (); +#else + int bad_fd = 1000000; +#endif if (fcntl (0, F_DUPFD, -1) != -1) result |= 1; if (errno != EINVAL) result |= 2; + if (fcntl (0, F_DUPFD, bad_fd) != -1) result |= 4; + if (errno != EINVAL) result |= 8; return result; ]])], [gl_cv_func_fcntl_f_dupfd_works=yes], |