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Diffstat (limited to 'am/aggr.m4')
-rw-r--r-- | am/aggr.m4 | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/am/aggr.m4 b/am/aggr.m4 new file mode 100644 index 0000000..2bdbb46 --- /dev/null +++ b/am/aggr.m4 @@ -0,0 +1,60 @@ +dnl Autoconf macros for checking for aggregate type members +dnl +dnl Copyright (C) 1996, 1997, 1998, 2002, 2004, 2005, 2007 Free Software Foundation, Inc. +dnl +dnl Mostly written by Miles Bader <miles@gnu.ai.mit.edu> +dnl +dnl This program is free software; you can redistribute it and/or modify +dnl it under the terms of the GNU General Public License as published by +dnl the Free Software Foundation; either version 3, or (at your option) +dnl any later version. +dnl +dnl This program is distributed in the hope that it will be useful, +dnl but WITHOUT ANY WARRANTY; without even the implied warranty of +dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +dnl GNU General Public License for more details. +dnl +dnl You should have received a copy of the GNU General Public License +dnl along with this program; if not, write to the Free Software +dnl Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +dnl + +dnl IU_CHECK_MEMBER(AGGREGATE.MEMBER, +dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], +dnl [INCLUDES]) +dnl AGGREGATE.MEMBER is for instance `struct passwd.pw_gecos'. +dnl The member itself can be of an aggregate type +dnl Shell variables are not a valid argument. +AC_DEFUN([IU_CHECK_MEMBER], +[AS_LITERAL_IF([$1], [], + [AC_FATAL([$0: requires literal arguments])])dnl +m4_bmatch([$1], [\.], , + [m4_fatal([$0: Did not see any dot in `$1'])])dnl +AS_VAR_PUSHDEF([ac_Member], [ac_cv_member_$1])dnl +dnl Extract the aggregate name, and the member name +AC_CACHE_CHECK([for $1], ac_Member, +[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT([$4])], +[dnl AGGREGATE ac_aggr; +static m4_bpatsubst([$1], [\..*]) ac_aggr; +dnl ac_aggr.MEMBER; +if (sizeof(ac_aggr.m4_bpatsubst([$1], [^[^.]*\.]))) +return 0;])], + [AS_VAR_SET(ac_Member, yes)], + [AS_VAR_SET(ac_Member, no)])]) +AS_IF([test AS_VAR_GET(ac_Member) = yes], [$2], [$3]) +AS_VAR_POPDEF([ac_Member])dnl +])dnl IU_CHECK_MEMBER + +dnl IU_CHECK_MEMBERS([AGGREGATE.MEMBER, ...], +dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND] +dnl [INCLUDES]) +AC_DEFUN([IU_CHECK_MEMBERS], +[m4_foreach([AC_Member], [$1], + [IU_CHECK_MEMBER(AC_Member, + [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_[]AC_Member), 1, + [Define to 1 if `]m4_bpatsubst(AC_Member, + [^[^.]*\.])[' is + member of `]m4_bpatsubst(AC_Member, [\..*])['.]) +$2], + [$3], + [$4])])]) |