diff --git a/Makefile b/Makefile
index 1701a83c3..d0d2ab986 100644
--- a/Makefile
+++ b/Makefile
@@ -86,7 +86,7 @@ o/$(MODE):			\
 	o/$(MODE)/examples	\
 	o/$(MODE)/third_party
 
-ifneq ($(USE_SYSTEM_TOOLCHAIN),)
+ifeq ($(USE_SYSTEM_TOOLCHAIN),)
 .STRICT = 1
 endif
 
@@ -100,6 +100,7 @@ endif
 	r:build/portcosmo.h	\
 	/proc/stat		\
 	rw:/dev/null		\
+	rw:/dev/full		\
 	w:o/stack.log		\
 	/etc/hosts		\
 	~/.runit.psk		\
@@ -148,13 +149,13 @@ include libc/log/log.mk				# │
 include third_party/getopt/getopt.mk		# │
 include third_party/bzip2/bzip2.mk		# │
 include dsp/core/core.mk			# │
+include third_party/musl/musl.mk		# │
 include libc/x/x.mk				# │
 include third_party/stb/stb.mk			# │
 include dsp/scale/scale.mk			# │
 include dsp/mpeg/mpeg.mk			# │
 include dsp/dsp.mk				# │
 include third_party/zlib/gz/gz.mk		# │
-include third_party/musl/musl.mk		# │
 include third_party/intel/intel.mk		# │
 include third_party/aarch64/aarch64.mk		# │
 include libc/libc.mk				#─┘
@@ -436,7 +437,7 @@ aarch64:
 	$(MAKE) m=aarch64
 
 clean:
-	rm -rf o
+	$(RM) -r o
 
 # UNSPECIFIED PREREQUISITES TUTORIAL
 #
diff --git a/ape/ape.mk b/ape/ape.mk
index 60c52d8b2..5d575aa38 100644
--- a/ape/ape.mk
+++ b/ape/ape.mk
@@ -129,6 +129,7 @@ o/$(MODE)/ape/ape-no-modify-self.o:		\
 		ape/ape.internal.h		\
 		libc/dce.h			\
 		libc/elf/def.h			\
+		libc/thread/tls.h		\
 		libc/intrin/asancodes.h		\
 		libc/macho.internal.h		\
 		libc/macros.internal.h		\
@@ -158,6 +159,7 @@ o/$(MODE)/ape/ape-copy-self.o:			\
 		ape/ape.internal.h		\
 		libc/dce.h			\
 		libc/elf/def.h			\
+		libc/thread/tls.h		\
 		libc/intrin/asancodes.h		\
 		libc/macho.internal.h		\
 		libc/macros.internal.h		\
diff --git a/build/bootstrap/rm.com b/build/bootstrap/rm.com
index be89f8c0f..c1a311f3f 100755
Binary files a/build/bootstrap/rm.com and b/build/bootstrap/rm.com differ
diff --git a/libc/calls/remove.c b/libc/calls/remove.c
index 256adff3a..029b77bb4 100644
--- a/libc/calls/remove.c
+++ b/libc/calls/remove.c
@@ -18,6 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
 #include "libc/errno.h"
+#include "libc/sysv/consts/at.h"
 
 /**
  * Deletes "file" or empty directory associtaed with name.
@@ -26,5 +27,9 @@
  * @see unlink() and rmdir() which this abstracts
  */
 int remove(const char *name) {
-  return unlink(name) != -1 || (errno == EISDIR && rmdir(name) != -1) ? 0 : -1;
+  int e = errno;
+  if (!unlinkat(AT_FDCWD, name, 0)) return 0;
+  if (errno != EISDIR) return -1;
+  errno = e;
+  return unlinkat(AT_FDCWD, name, AT_REMOVEDIR);
 }
diff --git a/libc/nexgen32e/nexgen32e.mk b/libc/nexgen32e/nexgen32e.mk
index c7f9cd69d..b37bfb6f0 100644
--- a/libc/nexgen32e/nexgen32e.mk
+++ b/libc/nexgen32e/nexgen32e.mk
@@ -85,9 +85,9 @@ o/$(MODE)/libc/nexgen32e/gclongjmp.o: libc/nexgen32e/gclongjmp.S
 	@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
 o/$(MODE)/libc/nexgen32e/checkstackalign.o: libc/nexgen32e/checkstackalign.S
 	@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
-o/$(MODE)/libc/nexgen32e/blink_xnu_aarch64.o: libc/nexgen32e/blink_xnu_aarch64.S
+o/$(MODE)/libc/nexgen32e/blink_xnu_aarch64.o: libc/nexgen32e/blink_xnu_aarch64.S ape/blink-xnu-aarch64.gz
 	@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
-o/$(MODE)/libc/nexgen32e/blink_linux_aarch64.o: libc/nexgen32e/blink_linux_aarch64.S
+o/$(MODE)/libc/nexgen32e/blink_linux_aarch64.o: libc/nexgen32e/blink_linux_aarch64.S ape/blink-linux-aarch64.gz
 	@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
 
 LIBC_NEXGEN32E_LIBS = $(foreach x,$(LIBC_NEXGEN32E_ARTIFACTS),$($(x)))
diff --git a/libc/x/rmrf.c b/libc/x/rmrf.c
index b59560e53..505998e9b 100644
--- a/libc/x/rmrf.c
+++ b/libc/x/rmrf.c
@@ -16,66 +16,38 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/assert.h"
 #include "libc/calls/calls.h"
-#include "libc/calls/struct/dirent.h"
-#include "libc/calls/struct/stat.h"
 #include "libc/errno.h"
-#include "libc/mem/mem.h"
-#include "libc/runtime/runtime.h"
-#include "libc/stdio/stdio.h"
-#include "libc/str/str.h"
-#include "libc/sysv/consts/dt.h"
-#include "libc/sysv/consts/s.h"
+#include "libc/sysv/errfuns.h"
 #include "libc/x/x.h"
+#include "third_party/musl/ftw.h"
 
-static int rmrfdir(const char *dirpath) {
+static int rmrf_callback(const char *fpath,      //
+                         const struct stat *st,  //
+                         int typeflag,           //
+                         struct FTW *ftwbuf) {   //
   int rc;
-  DIR *d;
-  char *path;
-  struct dirent *e;
-  if (!(d = opendir(dirpath))) return -1;
-  while ((e = readdir(d))) {
-    if (!strcmp(e->d_name, ".")) continue;
-    if (!strcmp(e->d_name, "..")) continue;
-    _npassert(!strchr(e->d_name, '/'));
-    path = xjoinpaths(dirpath, e->d_name);
-    if (e->d_type == DT_DIR) {
-      rc = rmrfdir(path);
-    } else {
-      rc = unlink(path);
-    }
-    free(path);
-    if (rc == -1) {
-      closedir(d);
-      return -1;
+  if (typeflag == FTW_DNR) {
+    if (!(rc = chmod(fpath, 0700))) {
+      return nftw(fpath, rmrf_callback, 128 - ftwbuf->level,
+                  FTW_PHYS | FTW_DEPTH);
     }
+  } else if (typeflag == FTW_DP) {
+    rc = rmdir(fpath);
+  } else {
+    rc = unlink(fpath);
+  }
+  if (rc == -1 && errno == ENOENT) {
+    rc = 0;
   }
-  rc = closedir(d);
-  rc |= rmdir(dirpath);
   return rc;
 }
 
 /**
  * Recursively removes file or directory.
- *
  * @return 0 on success, or -1 w/ errno
  */
 int rmrf(const char *path) {
-  int e;
-  struct stat st;
-  e = errno;
-  if (stat(path, &st) == -1) {
-    if (errno == ENOENT) {
-      errno = e;
-      return 0;
-    } else {
-      return -1;
-    }
-  }
-  if (!S_ISDIR(st.st_mode)) {
-    return unlink(path);
-  } else {
-    return rmrfdir(path);
-  }
+  if (path[0] == '/' && !path[1]) return enotsup();
+  return nftw(path, rmrf_callback, 128, FTW_PHYS | FTW_DEPTH);
 }
diff --git a/libc/x/x.mk b/libc/x/x.mk
index 0d23edf8a..e1e814269 100644
--- a/libc/x/x.mk
+++ b/libc/x/x.mk
@@ -35,6 +35,7 @@ LIBC_X_A_DIRECTDEPS =				\
 	LIBC_STR				\
 	LIBC_SYSV				\
 	THIRD_PARTY_GDTOA			\
+	THIRD_PARTY_MUSL			\
 	THIRD_PARTY_ZLIB
 
 LIBC_X_A_DEPS :=				\
diff --git a/test/libc/runtime/grow_test.c b/test/libc/runtime/grow_test.c
index e50565d58..a3a2338bc 100644
--- a/test/libc/runtime/grow_test.c
+++ b/test/libc/runtime/grow_test.c
@@ -27,6 +27,8 @@
 #include "libc/str/str.h"
 #include "libc/testlib/testlib.h"
 
+STATIC_YOINK("realloc");
+
 TEST(grow, testNull_hasAllocatingBehavior) {
   void *p = NULL;
   size_t capacity = 0;
diff --git a/test/libc/thread/pthread_setname_np_test.c b/test/libc/thread/pthread_setname_np_test.c
index d4744351a..08903c1a4 100644
--- a/test/libc/thread/pthread_setname_np_test.c
+++ b/test/libc/thread/pthread_setname_np_test.c
@@ -101,6 +101,7 @@ TEST(pthread_setname_np, GetNameOfOtherThread) {
   while (!atomic_load(&sync1)) pthread_yield();
   errno_t e = pthread_getname_np(id, me, sizeof(me));
   if (IsLinux() && e == ENOENT) return;  // bah old kernel
+  if (IsLinux() && e == EACCES) return;  // meh landlock
   ASSERT_EQ(0, e);
   EXPECT_STREQ("justine", me);
   ASSERT_EQ(0, pthread_setname_np(id, "tunney"));
diff --git a/third_party/musl/ftw.c b/third_party/musl/ftw.c
index f3f174117..d92f3f8fb 100644
--- a/third_party/musl/ftw.c
+++ b/third_party/musl/ftw.c
@@ -31,19 +31,23 @@ asm(".ident\t\"\\n\\n\
 Musl libc (MIT License)\\n\
 Copyright 2005-2014 Rich Felker, et. al.\"");
 asm(".include \"libc/disclaimer.inc\"");
-
-/* clang-format off */
+// clang-format off
 
 /**
  * Walks file tree.
  *
+ * @return 0 on success, -1 on error, or non-zero `fn` result
  * @see examples/walk.c for example
  * @see nftw()
  */
-int ftw(const char *path, int (*fn)(const char *, const struct stat *, int), int fd_limit)
+int ftw(const char *dirpath,
+	int fn(const char *fpath,
+	       const struct stat *st,
+	       int typeflag),
+	int fd_limit)
 {
 	/* The following cast assumes that calling a function with one
 	 * argument more than it needs behaves as expected. This is
 	 * actually undefined, but works on all real-world machines. */
-	return nftw(path, (int (*)())fn, fd_limit, FTW_PHYS);
+	return nftw(dirpath, (int (*)())fn, fd_limit, FTW_PHYS);
 }
diff --git a/third_party/musl/ftw.h b/third_party/musl/ftw.h
index 1346a4cd6..91eaf0267 100644
--- a/third_party/musl/ftw.h
+++ b/third_party/musl/ftw.h
@@ -4,21 +4,79 @@
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
-#define FTW_F   1 /* file */
-#define FTW_D   2 /* directory */
-#define FTW_DNR 3 /* directory that cannot be read */
-#define FTW_NS  4 /* not a symbolic link and stat failed */
-#define FTW_SL  5 /* symbolic link */
-#define FTW_DP  6 /* directory and FTW_DEPTH was specified */
-#define FTW_SLN 7 /* symbolic link pointing to nonexistent file */
+/**
+ * Type for file.
+ */
+#define FTW_F 1
 
-#define FTW_PHYS  1
+/**
+ * Type for directory.
+ */
+#define FTW_D 2
+
+/**
+ * Type for directory that cannot be read.
+ */
+#define FTW_DNR 3
+
+/**
+ * Type for stat() failed and not a symbolic link.
+ */
+#define FTW_NS 4
+
+/**
+ * Type for symbolic link when `FTW_PHYS` is in flags.
+ */
+#define FTW_SL 5
+
+/**
+ * Directory and `FTW_DEPTH` in flags.
+ */
+#define FTW_DP 6
+
+/**
+ * Type for broken symbolic link when `FTW_PHYS` is not in flags.
+ */
+#define FTW_SLN 7
+
+/**
+ * Flag to prevent following symbolic links (recommended).
+ * @see nftw() flags
+ */
+#define FTW_PHYS 1
+
+/**
+ * Flag to prevent crossing mount points.
+ * @see nftw() flags
+ */
 #define FTW_MOUNT 2
+
+/**
+ * Unsupported.
+ * @see nftw() flags
+ */
 #define FTW_CHDIR 4
+
+/**
+ * Flag for post-order traversal.
+ *
+ * 1. Will use `FTW_DP` instead of `FTW_D` as type.
+ * 2. Directory callback happens *after* rather than before.
+ *
+ * @see nftw() flags
+ */
 #define FTW_DEPTH 8
 
 struct FTW {
+
+  /**
+   * Byte offset of basename component in `fpath` passed to callback.
+   */
   int base;
+
+  /**
+   * Depth relative to `dirpath` whose level is zero.
+   */
   int level;
 };
 
diff --git a/third_party/musl/nftw.c b/third_party/musl/nftw.c
index 48145e705..992478279 100644
--- a/third_party/musl/nftw.c
+++ b/third_party/musl/nftw.c
@@ -35,17 +35,13 @@
 #include "libc/thread/thread.h"
 #include "third_party/musl/ftw.h"
 
+#define PATH_MAXIMUS 4096
+
 asm(".ident\t\"\\n\\n\
 Musl libc (MIT License)\\n\
 Copyright 2005-2014 Rich Felker, et. al.\"");
 asm(".include \"libc/disclaimer.inc\"");
-
-/* no reason to impose windows limit
-   small enough to fit in stack frame
-   should be changed to use realloc */
-#define PATH_MAX2 2048
-
-/* clang-format off */
+// clang-format off
 
 struct history
 {
@@ -56,7 +52,11 @@ struct history
 	int base;
 };
 
-static int do_nftw(char *path, int (*fn)(const char *, const struct stat *, int, struct FTW *), int fd_limit, int flags, struct history *h)
+static int do_nftw(char *path,
+		   int fn(const char *, const struct stat *, int, struct FTW *),
+		   int fd_limit,
+		   int flags,
+		   struct history *h)
 {
 	size_t l = strlen(path), j = l && path[l-1]=='/' ? l-1 : l;
 	struct stat st;
@@ -128,7 +128,7 @@ static int do_nftw(char *path, int (*fn)(const char *, const struct stat *, int,
 				 && (!de->d_name[1]
 				  || (de->d_name[1]=='.'
 				   && !de->d_name[2]))) continue;
-				if (strlen(de->d_name) >= PATH_MAX2-l) {
+				if (strlen(de->d_name) >= PATH_MAXIMUS-l) {
 					errno = ENAMETOOLONG;
 					closedir(d);
 					return -1;
@@ -157,25 +157,33 @@ static int do_nftw(char *path, int (*fn)(const char *, const struct stat *, int,
 /**
  * Walks file tree.
  *
+ * @return 0 on success, -1 on error, or non-zero `fn` result
  * @see examples/walk.c for example
  */
-int nftw(const char *path, int (*fn)(const char *, const struct stat *, int, struct FTW *), int fd_limit, int flags)
+int nftw(const char *dirpath,
+	 int fn(const char *fpath,
+		const struct stat *st,
+		int typeflag,
+		struct FTW *ftwbuf),
+	 int fd_limit,
+	 int flags)
 {
 	int r, cs;
 	size_t l;
-	char pathbuf[PATH_MAX2+1];
+	char pathbuf[PATH_MAXIMUS+1];
 
 	if (fd_limit <= 0) return 0;
 
-	l = strlen(path);
-	if (l > PATH_MAX2) {
+	l = strlen(dirpath);
+	if (l > PATH_MAXIMUS) {
 		errno = ENAMETOOLONG;
 		return -1;
 	}
-	memcpy(pathbuf, path, l+1);
+	memcpy(pathbuf, dirpath, l+1);
 
 	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
 	r = do_nftw(pathbuf, fn, fd_limit, flags, NULL);
 	pthread_setcancelstate(cs, 0);
+
 	return r;
 }
diff --git a/tool/build/rm.c b/tool/build/rm.c
index d374e277f..b938142ac 100644
--- a/tool/build/rm.c
+++ b/tool/build/rm.c
@@ -17,13 +17,17 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
+#include "libc/calls/struct/stat.h"
 #include "libc/errno.h"
 #include "libc/fmt/magnumstrs.internal.h"
+#include "libc/intrin/kprintf.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/ok.h"
+#include "libc/sysv/consts/s.h"
 #include "third_party/getopt/getopt.internal.h"
+#include "third_party/musl/ftw.h"
 
 #define USAGE \
   " FILE...\n\
@@ -34,11 +38,15 @@ SYNOPSIS\n\
 \n\
 FLAGS\n\
 \n\
-  -h      help\n\
-  -f      force\n\
+  -h        help\n\
+  -f        force\n\
+  -f or -R  recursive\n\
+  -d        remove empty dirs\n\
 \n"
 
 static bool force;
+static bool recursive;
+static bool doemptydirs;
 static const char *prog;
 
 static wontreturn void PrintUsage(int rc, int fd) {
@@ -48,11 +56,18 @@ static wontreturn void PrintUsage(int rc, int fd) {
 
 static void GetOpts(int argc, char *argv[]) {
   int opt;
-  while ((opt = getopt(argc, argv, "hf")) != -1) {
+  while ((opt = getopt(argc, argv, "rRdhf")) != -1) {
     switch (opt) {
       case 'f':
         force = true;
         break;
+      case 'd':
+        doemptydirs = true;
+        break;
+      case 'r':
+      case 'R':
+        recursive = true;
+        break;
       case 'h':
         PrintUsage(0, 1);
       default:
@@ -61,12 +76,56 @@ static void GetOpts(int argc, char *argv[]) {
   }
 }
 
-static void Remove(const char *path) {
-  if (!force && access(path, W_OK) == -1) {
-    perror(path);
+static int OnFile(const char *fpath, const struct stat *st, int typeflag,
+                  struct FTW *ftwbuf) {
+  int rc;
+  if (!force && typeflag == FTW_DNR) {
+    rc = -1;
+  } else if (!force && !S_ISLNK(st->st_mode) && access(fpath, W_OK)) {
+    rc = -1;
+  } else if (typeflag == FTW_DNR) {
+    if (!(rc = chmod(fpath, 0700))) {
+      rc = nftw(fpath, OnFile, 128 - ftwbuf->level, FTW_PHYS | FTW_DEPTH);
+    }
+  } else if (typeflag == FTW_DP) {
+    rc = rmdir(fpath);
+  } else {
+    rc = unlink(fpath);
+  }
+  if (rc == -1) {
+    if (force && errno == ENOENT) return 0;
+    perror(fpath);
     exit(1);
   }
-  if (unlink(path) == -1) {
+  return 0;
+}
+
+static void Remove(const char *path) {
+  int rc;
+  struct stat st;
+  if (path[0] == '/' && !path[1]) {
+    tinyprint(2, prog, ": add a dot if you want\n", NULL);
+    exit(1);
+  }
+  if (recursive) {
+    rc = nftw(path, OnFile, 128, FTW_PHYS | FTW_DEPTH);
+  } else {
+    if (lstat(path, &st)) {
+      if (force && errno == ENOENT) return;
+      perror(path);
+      exit(1);
+    }
+    if (!force && !S_ISLNK(st.st_mode) && access(path, W_OK)) {
+      perror(path);
+      exit(1);
+    }
+    if (S_ISDIR(st.st_mode) && doemptydirs) {
+      rc = rmdir(path);
+    } else {
+      rc = unlink(path);
+    }
+  }
+  if (rc == -1) {
     if (force && errno == ENOENT) return;
     perror(path);
     exit(1);
@@ -75,17 +134,13 @@ static void Remove(const char *path) {
 
 int main(int argc, char *argv[]) {
   int i;
-
   prog = argv[0];
   if (!prog) prog = "rm";
-
-  if (argc < 2) {
+  GetOpts(argc, argv);
+  if (optind == argc) {
     tinyprint(2, prog, ": missing operand\n", NULL);
     exit(1);
   }
-
-  GetOpts(argc, argv);
-
   for (i = optind; i < argc; ++i) {
     Remove(argv[i]);
   }
diff --git a/tool/scripts/cosmoc++ b/tool/scripts/cosmoc++
index 711349a0f..b3d8e49c2 100755
--- a/tool/scripts/cosmoc++
+++ b/tool/scripts/cosmoc++
@@ -71,7 +71,7 @@ ORIGINAL="$0 $*"
 PLATFORM="-D__COSMOPOLITAN__"
 PREDEF="-include libc/integral/normalize.inc"
 CCFLAGS="-fdata-sections -ffunction-sections -fno-pie -mno-tls-direct-seg-refs -mno-red-zone -fportcosmo"
-CXXFLAGS="-fno-exceptions -fuse-cxa-atexit -fno-threadsafe-statics"
+CXXFLAGS="-fno-rtti -fno-exceptions -fuse-cxa-atexit -fno-threadsafe-statics"
 CPPFLAGS="-nostdinc -iquote $COSMO -isystem $COSMOS/include -isystem $COSMO/libc/isystem"
 LDFLAGS="-static -no-pie -nostdlib -fuse-ld=bfd -Wl,-melf_x86_64"
 APEFLAGS="-L$COSMOS/lib -Wl,--gc-sections -Wl,-T,$COSMO/o/$MODE/ape/public/ape.lds $COSMO/o/$MODE/ape/ape-no-modify-self.o $COSMO/o/$MODE/libc/crt/crt.o"