7zip: fix -Wunused-function if zstd.h exists but zstd can't be linked

diff --git a/libarchive/archive_write_set_format_7zip.c b/libarchive/archive_write_set_format_7zip.c
index a0dcc537641ee1b7ed91870fac9070e42475d6bd..f3f8610597e7ac89f6cd785556f3d463c641bc82 100644 (file)
--- a/libarchive/archive_write_set_format_7zip.c
+++ b/libarchive/archive_write_set_format_7zip.c
@@ -314,7 +314,7 @@ static int  _7z_compression_init_encoder(struct archive_write *, unsigned,
                    int);
 static int     compression_init_encoder_zstd(struct archive *,
                    struct la_zstream *, int, int);
-#if defined(HAVE_ZSTD_H)
+#if HAVE_ZSTD_H && HAVE_ZSTD_compressStream
 static int     compression_code_zstd(struct archive *,
                    struct la_zstream *, enum la_zaction);
 static int     compression_end_zstd(struct archive *, struct la_zstream *);