ft-index: restore a chunk that was lost in the merge

and other fixes for gcc-4.9.1 on sid

storage/tokudb/ft-index/CMakeLists.txt

@@ -6,6 +6,31 @@ project(TokuDB)
 set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")
 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
 
+## Versions of gcc >= 4.9.0 require special version of 'ar' and 'ranlib' for
+## link-time optimizations to work properly.
+##
+## From https://gcc.gnu.org/gcc-4.9/changes.html:
+##
+##     When using a linker plugin, compiling with the -flto option now
+##     generates slim objects files (.o) which only contain intermediate
+##     language representation for LTO. Use -ffat-lto-objects to create
+##     files which contain additionally the object code. To generate
+##     static libraries suitable for LTO processing, use gcc-ar and
+##     gcc-ranlib; to list symbols from a slim object file use
+##     gcc-nm. (Requires that ar, ranlib and nm have been compiled with
+##     plugin support.)
+if ((CMAKE_CXX_COMPILER_ID STREQUAL GNU) AND
+    NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.9.0"))
+  find_program(gcc_ar "gcc-ar")
+  if (gcc_ar)
+    set(CMAKE_AR "${gcc_ar}")
+  endif ()
+  find_program(gcc_ranlib "gcc-ranlib")
+  if (gcc_ranlib)
+    set(CMAKE_RANLIB "${gcc_ranlib}")
+  endif ()
+endif()
+
 include(TokuFeatureDetection)
 include(TokuSetupCompiler)
 include(TokuSetupCTest)

storage/tokudb/ft-index/ft/bndata.cc

@@ -341,7 +341,7 @@ void bn_data::move_leafentries_to(
 
     uint32_t i = 0;
     for (i = lbi; i < ube; i++) {
-        KLPAIR curr_kl;
+        KLPAIR curr_kl= 0;
         m_buffer.fetch(i, &curr_kl);
 
         size_t kl_size = klpair_size(curr_kl);

storage/tokudb/ft-index/ft/log_upgrade.cc

@@ -321,7 +321,7 @@ toku_maybe_upgrade_log(const char *env_dir, const char *log_dir, LSN * lsn_of_cl
         r = 0; //Logs are up to date
     else {
         FOOTPRINT(4);
-        LSN last_lsn;
+        LSN last_lsn= ZERO_LSN;
         TXNID last_xid;
         r = verify_clean_shutdown_of_log_version(log_dir, version_of_logs_on_disk, &last_lsn, &last_xid);
         if (r != 0) {

storage/tokudb/ft-index/ft/logger.cc

@@ -151,8 +151,8 @@ static bool is_a_logfile_any_version (const char *name, uint64_t *number_result,
 // added for #2424, improved for #2521
 static bool is_a_logfile (const char *name, long long *number_result) {
     bool rval;
-    uint64_t result;
-    uint32_t version;
+    uint64_t result= 0;
+    uint32_t version= 0;
     rval = is_a_logfile_any_version(name, &result, &version);
     if (rval && version != TOKU_LOG_VERSION)
         rval = false;
@@ -234,7 +234,7 @@ toku_logger_open_with_last_xid(const char *directory, TOKULOGGER logger, TXNID l
     if (logger->is_open) return EINVAL;
 
     int r;
-    TXNID last_xid_if_clean_shutdown;
+    TXNID last_xid_if_clean_shutdown= TXNID_NONE;
     r = toku_logfilemgr_init(logger->logfilemgr, directory, &last_xid_if_clean_shutdown);
     if ( r!=0 )
         return r;
@@ -1011,8 +1011,8 @@ int toku_fread_TXNID   (FILE *f, TXNID *txnid, struct x1764 *checksum, uint32_t
 }
 
 int toku_fread_TXNID_PAIR   (FILE *f, TXNID_PAIR *txnid, struct x1764 *checksum, uint32_t *len) {
-    TXNID parent;
-    TXNID child;
+    TXNID parent= TXNID_NONE;
+    TXNID child= TXNID_NONE;
     int r;
     r = toku_fread_TXNID(f, &parent, checksum, len); if (r != 0) { return r; }
     r = toku_fread_TXNID(f, &child, checksum, len);  if (r != 0) { return r; }