26 lines
678 B
Plaintext
26 lines
678 B
Plaintext
dnl $Id: check-declaration.m4,v 1.3 1999/03/01 13:03:08 joda Exp $
|
|
dnl
|
|
dnl
|
|
dnl Check if we need the declaration of a variable
|
|
dnl
|
|
|
|
dnl AC_HAVE_DECLARATION(includes, variable)
|
|
AC_DEFUN(AC_CHECK_DECLARATION, [
|
|
AC_MSG_CHECKING([if $2 is properly declared])
|
|
AC_CACHE_VAL(ac_cv_var_$2_declaration, [
|
|
AC_TRY_COMPILE([$1
|
|
extern struct { int foo; } $2;],
|
|
[$2.foo = 1;],
|
|
eval "ac_cv_var_$2_declaration=no",
|
|
eval "ac_cv_var_$2_declaration=yes")
|
|
])
|
|
|
|
define(foo, [HAVE_]translit($2, [a-z], [A-Z])[_DECLARATION])
|
|
|
|
AC_MSG_RESULT($ac_cv_var_$2_declaration)
|
|
if eval "test \"\$ac_cv_var_$2_declaration\" = yes"; then
|
|
AC_DEFINE(foo, 1, [define if your system declares $2])
|
|
fi
|
|
undefine([foo])
|
|
])
|