kc3-lang/gnulib/m4/st_mtim.m4

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• Hash : c281d94c
  Author :
  Date : 1999-01-29T05:05:56
  

  Use the 3-argument forms of AC_DEFINE* macros.
  

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• m4/st_mtim.m4

• #serial 4
  
  dnl From Paul Eggert.
  
  # Define ST_MTIM_NSEC to be the nanoseconds member of struct stat's st_mtim,
  # if it exists.
  
  AC_DEFUN(AC_STRUCT_ST_MTIM_NSEC,
   [AC_CACHE_CHECK([for nanoseconds member of struct stat.st_mtim],
     ac_cv_struct_st_mtim_nsec,
     [ac_save_CPPFLAGS="$CPPFLAGS"
      ac_cv_struct_st_mtim_nsec=no
      # tv_nsec -- the usual case
      # _tv_nsec -- Solaris 2.6, if
      #	(defined _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED == 1
      #	 && !defined __EXTENSIONS__)
      # st__tim.tv_nsec -- UnixWare 2.1.2
      for ac_val in tv_nsec _tv_nsec st__tim.tv_nsec; do
        CPPFLAGS="$ac_save_CPPFLAGS -DST_MTIM_NSEC=$ac_val"
        AC_TRY_COMPILE([#include <sys/types.h>
  #include <sys/stat.h>], [struct stat s; s.st_mtim.ST_MTIM_NSEC;],
          [ac_cv_struct_st_mtim_nsec=$ac_val; break])
      done
      CPPFLAGS="$ac_save_CPPFLAGS"])
  
    if test $ac_cv_struct_st_mtim_nsec != no; then
      AC_DEFINE_UNQUOTED(ST_MTIM_NSEC, $ac_cv_struct_st_mtim_nsec,
        [Define to be the nanoseconds member of struct stat's st_mtim,
     if it exists.])
    fi
   ]
  )
  

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