Do not use pthread.h API without header

diff --git a/libarchive/archive_random.c b/libarchive/archive_random.c
index f4d42547f69e0eb240e4ad5800f251f2f16e4530..a20b9b111510e87625ea4c9b73ad1f34f5ca51dd 100644 (file)
--- a/libarchive/archive_random.c
+++ b/libarchive/archive_random.c
@@ -142,11 +142,10 @@ struct arc4_stream {
        uint8_t s[256];
 };
 
-static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
-
 #define        RANDOMDEV       "/dev/urandom"
 #define        KEYSIZE         128
 #ifdef HAVE_PTHREAD_H
+static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
 #define        _ARC4_LOCK()    pthread_mutex_lock(&arc4random_mtx);
 #define        _ARC4_UNLOCK()  pthread_mutex_unlock(&arc4random_mtx);
 #else