diff --git a/libc/Android.bp b/libc/Android.bp
index 2f21ea8..b1d077d 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -1193,13 +1193,6 @@
     name: "libc_bionic",
 }
 
-genrule {
-    name: "generated_android_ids",
-    out: [ "generated_android_ids.h" ],
-    tool_files: [ "fs_config_generator.py" ],
-    cmd: "$(location fs_config_generator.py) aidarray system/core/include/private/android_filesystem_config.h > $(out)",
-}
-
 // ========================================================
 // libc_bionic_ndk.a- The portions of libc_bionic that can
 // be safely used in libc_ndk.a (no troublesome global data
@@ -1388,7 +1381,6 @@
     local_include_dirs: ["stdio"],
     include_dirs: ["bionic/libstdc++/include"],
     name: "libc_bionic_ndk",
-    generated_headers: ["generated_android_ids"],
 }
 
 // ========================================================
diff --git a/libc/bionic/grp_pwd.cpp b/libc/bionic/grp_pwd.cpp
index b6b5796..332b2b8 100644
--- a/libc/bionic/grp_pwd.cpp
+++ b/libc/bionic/grp_pwd.cpp
@@ -43,9 +43,6 @@
 #include "private/libc_logging.h"
 #include "private/ThreadLocalBuffer.h"
 
-// Generated android_ids array
-#include "generated_android_ids.h"
-
 // POSIX seems to envisage an implementation where the <pwd.h> functions are
 // implemented by brute-force searching with getpwent(3), and the <grp.h>
 // functions are implemented similarly with getgrent(3). This means that it's
diff --git a/libc/fs_config_generator.py b/libc/fs_config_generator.py
deleted file mode 120000
index aafb7dc..0000000
--- a/libc/fs_config_generator.py
+++ /dev/null
@@ -1 +0,0 @@
-../../build/tools/fs_config/fs_config_generator.py
\ No newline at end of file
diff --git a/libdl/libdl.c b/libdl/libdl.c
index 8329468..3fbd7e5 100644
--- a/libdl/libdl.c
+++ b/libdl/libdl.c
@@ -85,6 +85,9 @@
                                 struct android_namespace_t* parent,
                                 const void* caller_addr);
 
+__attribute__((__weak__, visibility("default")))
+void __loader_android_dlwarning(void* obj, void (*f)(void*, const char*));
+
 // Proxy calls to bionic loader
 void* dlopen(const char* filename, int flag) {
   const void* caller_addr = __builtin_return_address(0);
@@ -164,4 +167,6 @@
                                            caller_addr);
 }
 
-void android_dlwarning(void* obj, void (*f)(void*, const char*)) { f(obj, 0); }
+void android_dlwarning(void* obj, void (*f)(void*, const char*)) {
+  __loader_android_dlwarning(obj, f);
+}
diff --git a/tests/Android.bp b/tests/Android.bp
index 0868f6e..a9d302a 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -155,8 +155,6 @@
     shared: {
         enabled: false,
     },
-
-    generated_headers: ["generated_android_ids"],
 }
 
 // -----------------------------------------------------------------------------
diff --git a/tests/grp_pwd_test.cpp b/tests/grp_pwd_test.cpp
index a2c31d1..a684780 100644
--- a/tests/grp_pwd_test.cpp
+++ b/tests/grp_pwd_test.cpp
@@ -30,9 +30,6 @@
 
 #include <private/android_filesystem_config.h>
 
-// Generated android_ids array
-#include "generated_android_ids.h"
-
 enum uid_type_t {
   TYPE_SYSTEM,
   TYPE_APP
diff --git a/tools/versioner/src/Preprocessor.cpp b/tools/versioner/src/Preprocessor.cpp
index c863e6c..86bb225 100644
--- a/tools/versioner/src/Preprocessor.cpp
+++ b/tools/versioner/src/Preprocessor.cpp
@@ -439,8 +439,13 @@
 
   // Copy over the original headers before preprocessing.
   char* fts_paths[2] = { const_cast<char*>(src_dir.c_str()), nullptr };
-  FTS* fts = fts_open(fts_paths, FTS_LOGICAL, nullptr);
-  while (FTSENT* ent = fts_read(fts)) {
+  std::unique_ptr<FTS, decltype(&fts_close)> fts(fts_open(fts_paths, FTS_LOGICAL, nullptr),
+                                                 fts_close);
+  if (!fts) {
+    err(1, "failed to open directory %s", src_dir.c_str());
+  }
+
+  while (FTSENT* ent = fts_read(fts.get())) {
     llvm::StringRef path = ent->fts_path;
     if (!path.startswith(src_dir)) {
       err(1, "path '%s' doesn't start with source dir '%s'", ent->fts_path, src_dir.c_str());
@@ -461,7 +466,6 @@
            dst_path.c_str());
     }
   }
-  fts_close(fts);
 
   for (const auto& file_it : guards) {
     file_lines[file_it.first] = readFileLines(file_it.first);
diff --git a/tools/versioner/src/Utils.cpp b/tools/versioner/src/Utils.cpp
index 3806110..ef7facc 100644
--- a/tools/versioner/src/Utils.cpp
+++ b/tools/versioner/src/Utils.cpp
@@ -41,14 +41,14 @@
   std::vector<std::string> headers;
 
   char* dir_argv[2] = { const_cast<char*>(directory.c_str()), nullptr };
-  FTS* fts = fts_open(dir_argv, FTS_LOGICAL | FTS_NOCHDIR, nullptr);
+  std::unique_ptr<FTS, decltype(&fts_close)> fts(
+      fts_open(dir_argv, FTS_LOGICAL | FTS_NOCHDIR, nullptr), fts_close);
 
   if (!fts) {
     err(1, "failed to open directory '%s'", directory.c_str());
   }
 
-  FTSENT* ent;
-  while ((ent = fts_read(fts))) {
+  while (FTSENT* ent = fts_read(fts.get())) {
     if (ent->fts_info & (FTS_D | FTS_DP)) {
       continue;
     }
@@ -60,7 +60,6 @@
     headers.push_back(ent->fts_path);
   }
 
-  fts_close(fts);
   return headers;
 }
 
diff --git a/tools/versioner/src/VFS.cpp b/tools/versioner/src/VFS.cpp
index cd6d367..1aa7229 100644
--- a/tools/versioner/src/VFS.cpp
+++ b/tools/versioner/src/VFS.cpp
@@ -36,12 +36,14 @@
 
 static void addDirectoryToVFS(InMemoryFileSystem* vfs, const std::string& path) {
   char* paths[] = { const_cast<char*>(path.c_str()), nullptr };
-  FTS* fts = fts_open(paths, FTS_COMFOLLOW | FTS_LOGICAL | FTS_NOCHDIR, nullptr);
+  std::unique_ptr<FTS, decltype(&fts_close)> fts(
+      fts_open(paths, FTS_COMFOLLOW | FTS_LOGICAL | FTS_NOCHDIR, nullptr), fts_close);
+
   if (!fts) {
     err(1, "failed to open directory %s", path.c_str());
   }
 
-  while (FTSENT* ent = fts_read(fts)) {
+  while (FTSENT* ent = fts_read(fts.get())) {
     if ((ent->fts_info & FTS_F) == 0) {
       continue;
     }
@@ -61,8 +63,6 @@
       errx(1, "failed to add file '%s'", file_path);
     }
   }
-
-  fts_close(fts);
 }
 
 llvm::IntrusiveRefCntPtr<FileSystem> createCommonVFS(const std::string& header_dir,