Merge pull request #1812 from senhuang42/output-dir-flat

Support for --output-dir-flat: output into a directory

programs/util.h

@@ -134,6 +134,7 @@ int UTIL_setFileStat(const char* filename, stat_t* statbuf);
 U32 UTIL_isDirectory(const char* infilename);
 int UTIL_getFileStat(const char* infilename, stat_t* statbuf);
 int UTIL_isSameFile(const char* file1, const char* file2);
+int UTIL_compareStr(const void *p1, const void *p2);
 
 U32 UTIL_isLink(const char* infilename);
 #define UTIL_FILESIZE_UNKNOWN  ((U64)(-1))