after upgrading from 2.63 to 2.63b, i noticed some code configure.ac files
(like in openssh) results in invalid shell code. this is because
AC_TRY_COMPILE() is invoked with an empty 4th argument: []. i think
specifically, this:
AC_TRY_COMPILE(
[
#include <sys/types.h>
#include <shadow.h>
struct spwd sp;
],[ sp.sp_expire = sp.sp_lstchg = sp.sp_inact = 0; ],
[ sp_expire_available=yes ], []
)
turned into this:
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <sys/types.h>
#include <shadow.h>
struct spwd sp;
int
main ()
{
sp.sp_expire = sp.sp_lstchg = sp.sp_inact = 0;
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then
sp_expire_available=yes
else
fi
seems to be fallout of the conversion to using shell functions ... the else
case previously would always contain at least one statement where autoconf
internally would echo the build failure to the log file:
else
$as_echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
fi
-mike
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