dnl Macros to configure GPGME

dnl Copyright (C) 2004 g10 Code GmbH

dnl

dnl This file is part of GPGME.

dnl

dnl GPGME is free software; you can redistribute it and/or modify it

dnl under the terms of the GNU Lesser General Public License as

dnl published by the Free Software Foundation; either version 2.1 of the

dnl License, or (at your option) any later version.

dnl 

dnl GPGME is distributed in the hope that it will be useful, but WITHOUT

dnl ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

dnl or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General

dnl Public License for more details.

dnl 

dnl You should have received a copy of the GNU Lesser General Public

dnl License along with this program; if not, write to the Free Software

dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

dnl GNUPG_CHECK_VA_COPY()

dnl   Do some check on how to implement va_copy.

dnl   May define MUST_COPY_VA_BY_VAL.

dnl   Actual test code taken from glib-1.1.

AC_DEFUN([GNUPG_CHECK_VA_COPY],

[ AC_MSG_CHECKING(whether va_lists must be copied by value)

  AC_CACHE_VAL(gnupg_cv_must_copy_va_byval,[

    if test "$cross_compiling" = yes; then

      gnupg_cv_must_copy_va_byval=no

    else

      gnupg_cv_must_copy_va_byval=no

      AC_TRY_RUN([

       #include <stdarg.h>

       void f (int i, ...)

       {

          va_list args1, args2;

          va_start (args1, i);

          args2 = args1;

          if (va_arg (args2, int) != 42 || va_arg (args1, int) != 42)

            exit (1);

          va_end (args1);

          va_end (args2);

       }

       int main()

       {

          f (0, 42);

            return 0;

       }

      ],gnupg_cv_must_copy_va_byval=yes)

    fi

  ])

  if test "$gnupg_cv_must_copy_va_byval" = yes; then

     AC_DEFINE(MUST_COPY_VA_BYVAL,1,[used to implement the va_copy macro])

  fi

  if test "$cross_compiling" = yes; then

    AC_MSG_RESULT(assuming $gnupg_cv_must_copy_va_byval)

  else

    AC_MSG_RESULT($gnupg_cv_must_copy_va_byval)

  fi

])

dnl LIST_MEMBER()

dnl Check whether an element ist contained in a list.  Set `found' to

dnl `1' if the element is found in the list, to `0' otherwise.

AC_DEFUN([LIST_MEMBER],

[

name=$1

list=$2

found=0

for n in $list; do

  if test "x$name" = "x$n"; then

    found=1

  fi

done

])