test: wire 8 stdlib tests into make test

test/wcc/999_random_run.c

@@ -0,0 +1,54 @@
+/*
+ * 999_random_run — execute the lib/math/random @test fixture
+ * under the C-side `ww run` driver and assert exit 0.
+ *
+ * Placed at 999 (past the 980-989 stdlib-run sub-band) because
+ * random number generation exercises many narrow-int cgen paths;
+ * keeping it numbered at the tail makes its position in the test
+ * list visually distinct from the small-utility cluster. Sibling
+ * to 980_memio_run / 998_bufio_run. random_test.ww carries its
+ * own `export fn main()` that drives the @test fns and signals
+ * which case failed via the exit code, so this file is just a
+ * thin wrapper — no @test scanning, no synthetic main generation.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+static int
+runwait(const char *cmd)
+{
+	int rc = system(cmd);
+	if (rc == -1) return -1;
+	if (WIFEXITED(rc)) return WEXITSTATUS(rc);
+	return 1;
+}
+
+int
+main(void)
+{
+	const char *bin = getenv("BIN");
+	if (!bin) bin = "out/bin";
+	char absbin[1024];
+	if (bin[0] != '/') {
+		char cwd[1024];
+		if (getcwd(cwd, sizeof cwd) == NULL) return 1;
+		snprintf(absbin, sizeof absbin, "%s/%s", cwd, bin);
+		bin = absbin;
+	}
+	char cwd[1024];
+	if (getcwd(cwd, sizeof cwd) == NULL) return 1;
+
+	const char *src = "lib/math/random/random_test.ww";
+	char path[1024], cmd[2048];
+	snprintf(path, sizeof path, "%s/%s", cwd, src);
+	snprintf(cmd, sizeof cmd, "%s/ww run %s", bin, path);
+	int rc = runwait(cmd);
+	if (rc != 0) {
+		fprintf(stderr, "random_run FAIL: %s exited %d\n", src, rc);
+		return 1;
+	}
+	printf("random_run: %s ok\n", src);
+	return 0;
+}