openwrt/tools/mtd-utils/patches/101-ubifs-optional_lzo.patch

--- a/mkfs.ubifs/Makefile
+++ b/mkfs.ubifs/Makefile
@@ -6,7 +6,7 @@ ALL_SOURCES=*.[ch] hashtable/*.[ch]
 
 TARGETS = mkfs.ubifs
 
-LDLIBS_mkfs.ubifs = -lz -llzo2 -lm -luuid -L$(BUILDDIR)/../ubi-utils/ -lubi
+LDLIBS_mkfs.ubifs = -lz $(if,$(NO_LZO),,-llzo2) -lm -luuid -L$(BUILDDIR)/../ubi-utils/ -lubi
 LDLIBS_mkfs.ubifs += -L$(BUILDDIR)/../lib -lmtd -lcrc32
 LDLIBS_mkfs.ubifs += $(ZLIBLDFLAGS) $(LZOLDFLAGS)
 
--- a/mkfs.ubifs/compr.c
+++ b/mkfs.ubifs/compr.c
@@ -24,7 +24,9 @@
 #include <stdio.h>
 #include <stdint.h>
 #include <string.h>
+#if CONFIG_UBIFS_LZO
 #include <lzo/lzo1x.h>
+#endif
 #include <linux/types.h>
 
 #define crc32 __zlib_crc32
@@ -86,6 +88,16 @@ static int zlib_deflate(void *in_buf, si
 	return 0;
 }
 
+static int no_compress(void *in_buf, size_t in_len, void *out_buf,
+			size_t *out_len)
+{
+	memcpy(out_buf, in_buf, in_len);
+	*out_len = in_len;
+	return 0;
+}
+
+#if CONFIG_UBIFS_LZO
+
 static int lzo_compress(void *in_buf, size_t in_len, void *out_buf,
 			size_t *out_len)
 {
@@ -104,14 +116,16 @@ static int lzo_compress(void *in_buf, si
 	return 0;
 }
 
-static int no_compress(void *in_buf, size_t in_len, void *out_buf,
-		       size_t *out_len)
+#else
+
+static int lzo_compress(void *in_buf, size_t in_len, void *out_buf,
+			size_t *out_len)
 {
-	memcpy(out_buf, in_buf, in_len);
-	*out_len = in_len;
-	return 0;
+	return 1;
 }
 
+#endif
+
 static char *zlib_buf;
 
 static int favor_lzo_compress(void *in_buf, size_t in_len, void *out_buf,
@@ -198,9 +212,11 @@ int compress_data(void *in_buf, size_t i
 
 int init_compression(void)
 {
+#ifdef CONFIG_UBIFS_LZO
 	lzo_mem = malloc(LZO1X_999_MEM_COMPRESS);
 	if (!lzo_mem)
 		return -1;
+#endif
 
 	zlib_buf = malloc(UBIFS_BLOCK_SIZE * WORST_COMPR_FACTOR);
 	if (!zlib_buf) {
@@ -214,7 +230,9 @@ int init_compression(void)
 void destroy_compression(void)
 {
 	free(zlib_buf);
+#ifdef CONFIG_UBIFS_LZO
 	free(lzo_mem);
+#endif
 	if (errcnt)
 		fprintf(stderr, "%llu compression errors occurred\n", errcnt);
 }