runtime: fix issues with nr_cpus() (#26679)

* Statically link Macport legacy library

* Handle error with sysconf() in nr_cpus

* Fix formatting issue with runtime.c.v

Author: programmingkidx

GNUmakefile

@@ -47,7 +47,7 @@ LDFLAGS += -lMacportsLegacySupport
 VFLAGS += -cc $(CC)
 VFLAGS += -cflags "$(CFLAGS)"
 VFLAGS += -ldflags -L$(LEGACYLIBS)/lib
-VFLAGS += -ldflags -lMacportsLegacySupport
+VFLAGS += -cflags $(LEGACYLIBS)/lib/libMacportsLegacySupport.a
 endif
 endif
 

vlib/runtime/runtime_nix.c.v

@@ -4,7 +4,12 @@ fn C.sysconf(name i32) i64
 
 // nr_cpus returns the number of virtual CPU cores found on the system.
 pub fn nr_cpus() int {
-	return int(C.sysconf(C._SC_NPROCESSORS_ONLN))
+	mut cpus := int(C.sysconf(C._SC_NPROCESSORS_ONLN))
+	if cpus < 1 {
+		eprintln('Warning: sysconf(_SC_NPROCESSORS_ONLN) returned -1, returning CPU count as 1')
+		cpus = 1
+	}
+	return cpus
 }
 
 // total_memory returns total physical memory found on the system.