utimbuf.m4

来自「制作2.6内核的CLFS时 patch包」· M4 代码 · 共 41 行

#serial 5

dnl From Jim Meyering

dnl Define HAVE_STRUCT_UTIMBUF if `struct utimbuf' is declared --
dnl usually in <utime.h>.
dnl Some systems have utime.h but don't declare the struct anywhere.

AC_DEFUN([jm_CHECK_TYPE_STRUCT_UTIMBUF],
[
  AC_CHECK_HEADERS_ONCE(sys/time.h utime.h)
  AC_REQUIRE([AC_HEADER_TIME])
  AC_CACHE_CHECK([for struct utimbuf], fu_cv_sys_struct_utimbuf,
    [AC_TRY_COMPILE(
      [
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# ifdef HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif
#ifdef HAVE_UTIME_H
# include <utime.h>
#endif
      ],
      [static struct utimbuf x; x.actime = x.modtime;],
      fu_cv_sys_struct_utimbuf=yes,
      fu_cv_sys_struct_utimbuf=no)
    ])

  if test $fu_cv_sys_struct_utimbuf = yes; then
    AC_DEFINE(HAVE_STRUCT_UTIMBUF, 1,
      [Define if struct utimbuf is declared -- usually in <utime.h>.
       Some systems have utime.h but don't declare the struct anywhere. ])
  fi
])