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Member "amavisd-milter-1.7.2/aclocal/dirfd.m4" (6 Jan 2019, 761 Bytes) of package /linux/privat/amavisd-milter-1.7.2.tar.gz:

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    1 # Find out how to get the file descriptor associated with an open DIR*.
    2 
    3 AC_DEFUN([AC_CHECK_DIRFD],
    4 [
    5   AH_TEMPLATE([HAVE_DIRFD_AS_MACRO], [Define if dirfd() is a macro.])
    6   AC_REQUIRE([AC_PROG_CPP])
    7   AC_REQUIRE([AC_PROG_EGREP])
    8   AC_HEADER_DIRENT
    9   AC_CHECK_MEMBERS([DIR.d_fd, DIR.dd_fd, DIR.__dd_fd],
   10     [], [], [#include <dirent.h>])
   11   AC_CHECK_FUNCS([dirfd])
   12   AS_IF([test "$ac_cv_func_dirfd" = no],
   13     [AC_CACHE_CHECK([whether dirfd is a macro], [ac_cv_func_dirfd_macro],
   14       [AC_EGREP_CPP([func_dirfd_macro], [
   15 #include <dirent.h>
   16 #if defined(dirfd)
   17 func_dirfd_macro
   18 #endif],[ac_cv_func_dirfd_macro=yes],[ac_cv_func_dirfd_macro=no]
   19       )
   20     ])
   21   ])
   22   if test "$ac_cv_func_dirfd_macro" = yes; then
   23     AC_DEFINE([HAVE_DIRFD_AS_MACRO], [1])
   24   fi
   25 ])