Revert "Moving to glibc-fb"

This reverts commit d24961b6.

For some reason, glibc2.17-fb breaks gflags. Reverting for now

build_tools/fbcode.gcc481.sh

@@ -11,13 +11,13 @@ if [ "$CENTOS_VERSION" = "6" ]; then
 else
   TOOLCHAIN_EXECUTABLES="/mnt/gvfs/third-party/$TOOLCHAIN_REV/centos5.2-native"
 fi
-TOOLCHAIN_LIB_BASE="/mnt/gvfs/third-party/$TOOLCHAIN_REV/gcc-4.8.1-glibc-2.17-fb"
+TOOLCHAIN_LIB_BASE="/mnt/gvfs/third-party/$TOOLCHAIN_REV/gcc-4.8.1-glibc-2.17"
 
 # location of libhdfs libraries
 if test "$USE_HDFS"; then
   JAVA_HOME="/usr/local/jdk-6u22-64"
   JINCLUDE="-I$JAVA_HOME/include -I$JAVA_HOME/include/linux"
-  GLIBC_RUNTIME_PATH="/usr/local/fbcode/gcc-4.8.1-glibc-2.17-fb"
+  GLIBC_RUNTIME_PATH="/usr/local/fbcode/gcc-4.8.1-glibc-2.17"
   HDFSLIB=" -Wl,--no-whole-archive hdfs/libhdfs.a -L$JAVA_HOME/jre/lib/amd64 "
   HDFSLIB+=" -L$JAVA_HOME/jre/lib/amd64/server -L$GLIBC_RUNTIME_PATH/lib "
   HDFSLIB+=" -ldl -lverify -ljava -ljvm "

db/db_bench.cc

@@ -2531,6 +2531,8 @@ class Benchmark {
 
 int main(int argc, char** argv) {
   rocksdb::InstallStackTraceHandler();
+  google::SetUsageMessage(std::string("\nUSAGE:\n") + std::string(argv[0]) +
+                          " [OPTIONS]...");
   google::ParseCommandLineFlags(&argc, &argv, true);
 
   FLAGS_compaction_style_e = (rocksdb::CompactionStyle) FLAGS_compaction_style;

tools/db_repl_stress.cc

@@ -87,6 +87,9 @@ DEFINE_uint64(wal_size_limit_MB, 10, "the wal size limit for the run"
               "(in MB)");
 
 int main(int argc, const char** argv) {
+  google::SetUsageMessage(std::string("\nUSAGE:\n") + std::string(argv[0]) +
+    " --num_inserts=<num_inserts> --wal_ttl_seconds=<WAL_ttl_seconds>" +
+    " --wal_size_limit_MB=<WAL_size_limit_MB>");
   google::ParseCommandLineFlags(&argc, const_cast<char***>(&argv), true);
 
   Env* env = Env::Default();

tools/db_stress.cc

@@ -1488,6 +1488,8 @@ class StressTest {
 
 
 int main(int argc, char** argv) {
+  google::SetUsageMessage(std::string("\nUSAGE:\n") + std::string(argv[0]) +
+                          " [OPTIONS]...");
   google::ParseCommandLineFlags(&argc, &argv, true);
 
   if (FLAGS_statistics) {