How to fix that?
LOGDEBUG(("haystack_len %ld\n", haystack_len));
call the macro with one unique argument.
So it will produce:
do { if (DEBUG_TEST) syslog(LOG_MAKEPRI(LOG_SYSLOG, LOG_DEBUG), ("haystack_len %ld\n", haystack_len)); } while (0);
And ("haystack_len %ld\n", haystack_len)
use comma operator and result in haystack_len
So you have to call it that way: LOGDEBUG("haystack_len %ld\n", haystack_len);
Also, is there some way to see the macro-expanded code?
gcc -E
may help.