flock.m4 702 B

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  1. # flock.m4 serial 3
  2. dnl Copyright (C) 2008-2014 Free Software Foundation, Inc.
  3. dnl This file is free software; the Free Software Foundation
  4. dnl gives unlimited permission to copy and/or distribute it,
  5. dnl with or without modifications, as long as this notice is preserved.
  6. AC_DEFUN([gl_FUNC_FLOCK],
  7. [
  8. AC_REQUIRE([gl_HEADER_SYS_FILE_H_DEFAULTS])
  9. AC_CHECK_FUNCS_ONCE([flock])
  10. if test $ac_cv_func_flock = no; then
  11. HAVE_FLOCK=0
  12. fi
  13. ])
  14. dnl Prerequisites of lib/flock.c.
  15. AC_DEFUN([gl_PREREQ_FLOCK],
  16. [
  17. AC_CHECK_FUNCS_ONCE([fcntl])
  18. AC_CHECK_HEADERS_ONCE([unistd.h])
  19. dnl Do we have a POSIX fcntl lock implementation?
  20. AC_CHECK_MEMBERS([struct flock.l_type],[],[],[[#include <fcntl.h>]])
  21. ])