Fix clang warnings

cmake/BuildLibEIO.cmake

@@ -5,6 +5,7 @@ macro(libeio_build)
 
     set(eio_compile_flags "${eio_compile_flags} -Wno-unused-result")
     set(eio_compile_flags "${eio_compile_flags} -Wno-dangling-else")
+    set(eio_compile_flags "${eio_compile_flags} -Wno-unused-value")
     set(eio_compile_flags "${eio_compile_flags} -DENABLE_BUNDLED_LIBEIO=1")
     set(eio_compile_flags "${eio_compile_flags} -DEIO_STACKSIZE=0")
 

src/find_path.c

@@ -21,7 +21,7 @@ find_path(const char *argv0)
 		return path;
 
 	char buf[PATH_MAX];
-	uint32_t size = PATH_MAX - 1;
+	size_t size = PATH_MAX - 1;
 	if (argv0[0] == '/')
 		snprintf(buf, size, "%s", argv0);
 	else {
@@ -35,7 +35,8 @@ find_path(const char *argv0)
 		snprintf(buf, size, "%s", getexecname());
 		rc = 0;
 #elif defined(__APPLE__)
-		rc = _NSGetExecutablePath(buf, &size);
+		uint32_t usize = size;
+		rc = _NSGetExecutablePath(buf, &usize);
 #endif
 		if (rc == -1)
 			snprintf(buf, sizeof(buf) - 1, "%s", getenv("_"));

src/random.c

@@ -51,9 +51,8 @@ random_init(void)
 	}
 
 	int flags = fcntl(rfd, F_GETFD);
-	if (flags < 0)
-		goto srand;
-	fcntl(rfd, F_SETFD, flags | FD_CLOEXEC);
+	if (flags != -1)
+		fcntl(rfd, F_SETFD, flags | FD_CLOEXEC);
 
 	read(rfd, &seed, sizeof(seed));
 srand:
@@ -72,10 +71,11 @@ random_free(void)
 void
 random_bytes(char *buf, size_t size)
 {
+	size_t generated = 0;
+
 	if (rfd == -1)
 		goto rand;
 
-	size_t generated = 0;
 	int attempt = 0;
 	while (generated < size) {
 		ssize_t n = read(rfd, buf + generated, size - generated);