Fix ZSTD_STATIC_LINKING_ONLY with double include

diff --git a/lib/zstd.h b/lib/zstd.h
index 7db135b5b102c945798f436fa6c75442e005661b..607612026937f60d528c9417d36b2ed6d19a8d36 100644 (file)
--- a/lib/zstd.h
+++ b/lib/zstd.h
@@ -7,13 +7,13 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-#ifndef ZSTD_H_235446
-#define ZSTD_H_235446
-
 #if defined (__cplusplus)
 extern "C" {
 #endif
 
+#ifndef ZSTD_H_235446
+#define ZSTD_H_235446
+
 /* ======   Dependency   ======*/
 #include <stddef.h>   /* size_t */
 
@@ -313,9 +313,11 @@ ZSTDLIB_API size_t ZSTD_decompressStream(ZSTD_DStream* zds, ZSTD_outBuffer* outp
 ZSTDLIB_API size_t ZSTD_DStreamInSize(void);    /*!< recommended size for input buffer */
 ZSTDLIB_API size_t ZSTD_DStreamOutSize(void);   /*!< recommended size for output buffer. Guarantee to successfully flush at least one complete block in all circumstances. */
 
+#endif  /* ZSTD_H_235446 */
 
 
-#ifdef ZSTD_STATIC_LINKING_ONLY
+#if defined(ZSTD_STATIC_LINKING_ONLY) && !defined(ZSTD_H_ZSTD_STATIC_LINKING_ONLY)
+#define ZSTD_H_ZSTD_STATIC_LINKING_ONLY
 
 /****************************************************************************************
  * START OF ADVANCED AND EXPERIMENTAL FUNCTIONS
@@ -642,10 +644,8 @@ ZSTDLIB_API size_t ZSTD_decompressBlock(ZSTD_DCtx* dctx, void* dst, size_t dstCa
 ZSTDLIB_API size_t ZSTD_insertBlock(ZSTD_DCtx* dctx, const void* blockStart, size_t blockSize);  /**< insert block into `dctx` history. Useful for uncompressed blocks */
 
 
-#endif   /* ZSTD_STATIC_LINKING_ONLY */
+#endif   /* ZSTD_H_ZSTD_STATIC_LINKING_ONLY */
 
 #if defined (__cplusplus)
 }
 #endif
-
-#endif  /* ZSTD_H_235446 */