[PATCH RFC 4/4] erofs-utils: lib: remove the compile warning

[Hongbo Li]

Add the condition macro to avoid the compile warning.

Signed-off-by: Hongbo Li <lihongbo22 at huawei.com>
---
 lib/decompress.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/decompress.c b/lib/decompress.c
index 3f553a8..1e9fad7 100644
--- a/lib/decompress.c
+++ b/lib/decompress.c
@@ -9,6 +9,8 @@
 #include "erofs/err.h"
 #include "erofs/print.h"
 
+#if defined(HAVE_LIBZSTD) || defined(HAVE_QPL) || defined(HAVE_LIBDEFLATE) || \
+    defined(HAVE_ZLIB) || defined(HAVE_LIBLZMA) || defined(LZ4_ENABLED)
 static unsigned int z_erofs_fixup_insize(const u8 *padbuf, unsigned int padbufsize)
 {
 	unsigned int inputmargin;
@@ -17,6 +19,7 @@ static unsigned int z_erofs_fixup_insize(const u8 *padbuf, unsigned int padbufsi
 	     !padbuf[inputmargin]; ++inputmargin);
 	return inputmargin;
 }
+#endif
 
 #ifdef HAVE_LIBZSTD
 #include <zstd.h>
-- 
2.22.0