Fix FreeBSD 14 build (#975)

FreeBSD 14 defines 3-parameter CPU_AND() macro as a `do {} while` loop.
Our (void) in front of that loop creates a syntax error.

    CpuAffinitySet.cc:41:16: error: expected expression
    (void) CPU_AND(&cpuSet, &cpuSet, &theOrigCpuSet);

That (void) was added in commit 7ec6d51 to "remove GNU-specific syntax",
but we cannot tell what specific problem that 10-year old change solved.
Known 3-parameter CPU_AND(3) documentation says the call returns void.

diff --git a/src/CpuAffinitySet.cc b/src/CpuAffinitySet.cc
index 96f9faf37f855f7f3c1205784ca148fcb4eb9ae3..2d74d012b8b4cbae410e7badd861af40f9e754df 100644 (file)
--- a/src/CpuAffinitySet.cc
+++ b/src/CpuAffinitySet.cc
@@ -38,7 +38,7 @@ CpuAffinitySet::apply()
     } else {
         cpu_set_t cpuSet;
         memcpy(&cpuSet, &theCpuSet, sizeof(cpuSet));
-        (void) CPU_AND(&cpuSet, &cpuSet, &theOrigCpuSet);
+        CPU_AND(&cpuSet, &cpuSet, &theOrigCpuSet);
         if (CPU_COUNT(&cpuSet) <= 0) {
             debugs(54, DBG_IMPORTANT, "ERROR: invalid CPU affinity for process "
                    "PID " << getpid() << ", may be caused by an invalid core in "