This function tries to get a ssize_t value from a config file. But before returning it, it checks whether the value would fit in ssize_t and if not an error is printed out among with the range for the ssize_t type. However, on some platforms SSIZE_MAX may actually be a signed long type: util/virconf.c: In function 'virConfGetValueSSizeT': util/virconf.c:1268:9: error: format '%zd' expects argument of type 'signed size_t', but argument 9 has type 'long int' [-Werror=format=] virReportError(VIR_ERR_INTERNAL_ERROR, ^ $ grep -r SSIZE_MAX /usr/include/ /usr/include/bits/posix1_lim.h:#ifndef SSIZE_MAX /usr/include/bits/posix1_lim.h:# define SSIZE_MAX LONG_MAX Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/util/virconf.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/util/virconf.c b/src/util/virconf.c index 5085768..4dc82ec 100644 --- a/src/util/virconf.c +++ b/src/util/virconf.c @@ -1267,7 +1267,8 @@ int virConfGetValueSSizeT(virConfPtr conf, if (cval->l > SSIZE_MAX || cval->l < (-SSIZE_MAX - 1)) { virReportError(VIR_ERR_INTERNAL_ERROR, _("%s: value for '%s' parameter must be in range %zd:%zd"), - conf->filename, setting, -SSIZE_MAX - 1, SSIZE_MAX); + conf->filename, setting, + (ssize_t) -SSIZE_MAX - 1, (ssize_t) SSIZE_MAX); return -1; } -- 2.8.4