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29 lines
788 B
Plaintext
29 lines
788 B
Plaintext
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dnl $Id$
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dnl
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dnl rk_CHECK_VAR(variable, includes)
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AC_DEFUN([rk_CHECK_VAR], [
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AC_MSG_CHECKING(for $1)
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AC_CACHE_VAL(ac_cv_var_$1, [
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m4_ifval([$2],[
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[$2
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void * foo(void) { return &$1; }]],[[foo()]])],
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[ac_cv_var_$1=yes],[ac_cv_var_$1=no])])
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if test "$ac_cv_var_$1" != yes ; then
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[$2
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extern int $1;
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int foo(void) { return $1; }]],[[foo()]])],
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[ac_cv_var_$1=yes],[ac_cv_var_$1=no])
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fi
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])
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ac_foo=`eval echo \\$ac_cv_var_$1`
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AC_MSG_RESULT($ac_foo)
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if test "$ac_foo" = yes; then
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AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_[]$1), 1,
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[Define if you have the `]$1[' variable.])
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m4_ifval([$2], [AC_CHECK_DECLS([$1],[],[],[$2])])
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fi
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])
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AC_WARNING_ENABLE([obsolete])
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AU_DEFUN([AC_CHECK_VAR], [rk_CHECK_VAR([$2], [$1])], [foo])
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