Fix unnecessary macro redefintion warnings from zstd (#81917)

Co-authored-by: Andrew Krieger <[email protected]>

Author: akrieger

src/third-party/zstd/common/allocations.h

@@ -15,7 +15,9 @@
 #include "zstd_deps.h"   /* ZSTD_malloc, ZSTD_calloc, ZSTD_free, ZSTD_memset */
 
 #include "compiler.h" /* MEM_STATIC */
+#ifndef ZSTD_STATIC_LINKING_ONLY
 #define ZSTD_STATIC_LINKING_ONLY
+#endif
 #include "../zstd.h" /* ZSTD_customMem */
 
 #ifndef ZSTD_ALLOCATIONS_H

src/third-party/zstd/common/error_private.h

@@ -39,6 +39,9 @@
 *  Customization (error_public.h)
 ******************************************/
 typedef ZSTD_ErrorCode ERR_enum;
+#ifdef PREFIX
+#undef PREFIX
+#endif
 #define PREFIX(name) ZSTD_error_##name
 
 

src/third-party/zstd/common/zstd_internal.h

@@ -24,7 +24,9 @@
 #include "mem.h"
 #include "debug.h"                 /* assert, DEBUGLOG, RAWLOG, g_debuglevel */
 #include "error_private.h"
+#ifndef ZSTD_STATIC_LINKING_ONLY
 #define ZSTD_STATIC_LINKING_ONLY
+#endif
 #include "../zstd.h"
 #define FSE_STATIC_LINKING_ONLY
 #include "fse.h"