gnulib/import/m4/open-cloexec.m4

   1 # Test whether O_CLOEXEC is defined.
   2
   3 dnl Copyright 2017-2019 Free Software Foundation, Inc.
   4 dnl This file is free software; the Free Software Foundation
   5 dnl gives unlimited permission to copy and/or distribute it,
   6 dnl with or without modifications, as long as this notice is preserved.
   7
   8 AC_DEFUN([gl_PREPROC_O_CLOEXEC],
   9 [
  10   AC_CACHE_CHECK([for O_CLOEXEC],
  11     [gl_cv_macro_O_CLOEXEC],
  12     [AC_COMPILE_IFELSE(
  13        [AC_LANG_PROGRAM([[#include <fcntl.h>
  14                           #ifndef O_CLOEXEC
  15                             choke me;
  16                           #endif
  17                         ]],
  18                         [[return O_CLOEXEC;]])],
  19        [gl_cv_macro_O_CLOEXEC=yes],
  20        [gl_cv_macro_O_CLOEXEC=no])])
  21 ])