kc3-lang/automake/m4/regex.m4

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• Hash : fddb6ef1
  Author :
  Date : 2001-02-05T09:06:41
  

  * m4/regex.m4: Use AC_LIBSOURCES.
  * automake.in (scan_autoconf_traces): Trace AC_LIBSOURCE, not
  _AC_LIBOBJ_DECL.
  

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• m4/regex.m4

• ## --------------------------------- ##
  ## Check if --with-regex was given.  ##
  ## --------------------------------- ##
  
  # serial 2
  
  # AM_WITH_REGEX
  # -------------
  #
  # The idea is to distribute rx.[hc] and regex.[hc] together, for a
  # while.  The WITH_REGEX symbol is used to decide which of regex.h or
  # rx.h should be included in the application.  If `./configure
  # --with-regex' is given (the default), the package will use gawk's
  # regex.  If `./configure --without-regex', a check is made to see if
  # rx is already installed, as with newer Linux'es.  If not found, the
  # package will use the rx from the distribution.  If found, the
  # package will use the system's rx which, on Linux at least, will
  # result in a smaller executable file.
  #
  # FIXME: This macro seems quite obsolete now since rx doesn't seem to
  # be maintained, while regex is.
  AC_DEFUN([AM_WITH_REGEX],
  [ifdef([AC_LIBSOURCES],
         [AC_LIBSOURCES([rx.h, rx.c, regex.c, regex.h])])dnl
  AC_MSG_CHECKING([which of GNU rx or gawk's regex is wanted])
  AC_ARG_WITH(regex,
  [  --without-regex         use GNU rx in lieu of gawk's regex for matching],
              [test "$withval" = yes && am_with_regex=1],
              [am_with_regex=1])
  if test -n "$am_with_regex"; then
    AC_MSG_RESULT(regex)
    AC_DEFINE(WITH_REGEX, 1, [Define if using GNU regex])
    AC_CACHE_CHECK([for GNU regex in libc], am_cv_gnu_regex,
      [AC_TRY_LINK([],
                   [extern int re_max_failures; re_max_failures = 1],
  		 [am_cv_gnu_regex=yes],
                   [am_cv_gnu_regex=no])])
    if test $am_cv_gnu_regex = no; then
      LIBOBJS="$LIBOBJS regex.$ac_objext"
    fi
  else
    AC_MSG_RESULT(rx)
    AC_CHECK_FUNC(re_rx_search, , [LIBOBJS="$LIBOBJS rx.$ac_objext"])
  fi
  AC_SUBST(LIBOBJS)dnl
  ])
  

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