diff --git a/libc/calls/pledge-linux.c b/libc/calls/pledge-linux.c
index e59bd903c..4fffd46ac 100644
--- a/libc/calls/pledge-linux.c
+++ b/libc/calls/pledge-linux.c
@@ -1644,7 +1644,7 @@ static privileged void AllowMmapNoexec(struct Filter *f) {
       /*L2*/ BPF_STMT(BPF_ALU | BPF_AND | BPF_K, ~(PROT_READ | PROT_WRITE)),
       /*L3*/ BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, 0, 8 - 4),
       /*L4*/ BPF_STMT(BPF_LD | BPF_W | BPF_ABS, OFF(args[3])),  // flags
-      /*L5*/ BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x5a000),
+      /*L5*/ BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x52000),
       /*L6*/ BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, 0, 1),
       /*L7*/ BPF_STMT(BPF_RET | BPF_K, SECCOMP_RET_ALLOW),
       /*L8*/ BPF_STMT(BPF_LD | BPF_W | BPF_ABS, OFF(nr)),
diff --git a/libc/dlopen/BUILD.mk b/libc/dlopen/BUILD.mk
index 43814e89b..d8e38f98a 100644
--- a/libc/dlopen/BUILD.mk
+++ b/libc/dlopen/BUILD.mk
@@ -8,16 +8,8 @@ LIBC_DLOPEN = $(LIBC_DLOPEN_A_DEPS) $(LIBC_DLOPEN_A)
 LIBC_DLOPEN_A = o/$(MODE)/libc/dlopen/dlopen.a
 LIBC_DLOPEN_A_FILES := $(wildcard libc/dlopen/*)
 LIBC_DLOPEN_A_HDRS = $(filter %.h,$(LIBC_DLOPEN_A_FILES))
-LIBC_DLOPEN_A_SRCS_S = $(filter %.S,$(LIBC_DLOPEN_A_FILES))
-LIBC_DLOPEN_A_SRCS_C = $(filter %.c,$(LIBC_DLOPEN_A_FILES))
-
-LIBC_DLOPEN_A_SRCS =							\
-	$(LIBC_DLOPEN_A_SRCS_S)						\
-	$(LIBC_DLOPEN_A_SRCS_C)
-
-LIBC_DLOPEN_A_OBJS =							\
-	$(LIBC_DLOPEN_A_SRCS_S:%.S=o/$(MODE)/%.o)			\
-	$(LIBC_DLOPEN_A_SRCS_C:%.c=o/$(MODE)/%.o)
+LIBC_DLOPEN_A_SRCS = $(filter %.c,$(LIBC_DLOPEN_A_FILES))
+LIBC_DLOPEN_A_OBJS = $(LIBC_DLOPEN_A_SRCS:%.c=o/$(MODE)/%.o)
 
 LIBC_DLOPEN_A_CHECKS =							\
 	$(LIBC_DLOPEN_A).pkg						\
diff --git a/libc/nexgen32e/nt2sysv.S b/libc/nexgen32e/nt2sysv.S
index 0530d086c..eb7b32edd 100644
--- a/libc/nexgen32e/nt2sysv.S
+++ b/libc/nexgen32e/nt2sysv.S
@@ -32,8 +32,6 @@
 __nt2sysv:
 	push	%rbp
 	mov	%rsp,%rbp
-//	TODO(jart): We should probably find some way to use our own
-//	            stack when Windows delivers signals ;_;
 	sub	$256,%rsp
 	push	%rbx
 	push	%rdi
diff --git a/libc/nexgen32e/yield.h b/libc/nexgen32e/yield.h
deleted file mode 100755
index e69de29bb..000000000
diff --git a/third_party/make/job.c b/third_party/make/job.c
index 8f73533cd..9b54489dc 100644
--- a/third_party/make/job.c
+++ b/third_party/make/job.c
@@ -3792,24 +3792,5 @@ construct_command_argv (char *line, char **restp, struct file *file,
 
   return argv;
 }
-
-#if !defined(HAVE_DUP2) && !defined(_AMIGA)
-int
-dup2 (int old, int new)
-{
-  int fd;
-
-  (void) close (new);
-  EINTRLOOP (fd, dup (old));
-  if (fd != new)
-    {
-      (void) close (fd);
-      errno = EMFILE;
-      return -1;
-    }
-
-  return fd;
-}
-#endif /* !HAVE_DUP2 && !_AMIGA */
 
 /* On VMS systems, include special VMS functions.  */
diff --git a/third_party/make/misc.c b/third_party/make/misc.c
index eb14f4051..37316809c 100644
--- a/third_party/make/misc.c
+++ b/third_party/make/misc.c
@@ -556,22 +556,6 @@ dbg (const char *fmt, ...)
 
 /* Provide support for temporary files.  */
 
-#ifndef HAVE_STDLIB_H
-# ifdef HAVE_MKSTEMP
-int mkstemp (char *template);
-# else
-char *mktemp (char *template);
-# endif
-#endif
-
-#ifndef HAVE_UMASK
-mode_t
-umask (mode_t mask)
-{
-  return 0;
-}
-#endif
-
 #ifdef VMS
 # define DEFAULT_TMPFILE    "sys$scratch:gnv$make_cmdXXXXXX.com"
 #else
@@ -784,260 +768,3 @@ get_tmpfile (char **name)
 
   return file;
 }
-
-
-#if HAVE_TTYNAME && defined(__EMX__)
-/* OS/2 kLIBC has a declaration for ttyname(), so configure finds it.
-   But, it is not implemented!  Roll our own.  */
-char *ttyname (int fd)
-{
-  ULONG type;
-  ULONG attr;
-  ULONG rc;
-
-  rc = DosQueryHType (fd, &type, &attr);
-  if (rc)
-    {
-      errno = EBADF;
-      return NULL;
-    }
-
-  if (type == HANDTYPE_DEVICE)
-    {
-      if (attr & 3)     /* 1 = KBD$, 2 = SCREEN$ */
-        return (char *) "/dev/con";
-
-      if (attr & 4)     /* 4 = NUL */
-        return (char *) "/dev/nul";
-
-      if (attr & 8)     /* 8 = CLOCK$ */
-        return (char *) "/dev/clock$";
-    }
-
-  errno = ENOTTY;
-  return NULL;
-}
-#endif
-
-
-#if !HAVE_STRCASECMP && !HAVE_STRICMP && !HAVE_STRCMPI
-/* If we don't have strcasecmp() (from POSIX), or anything that can substitute
-   for it, define our own version.  */
-
-int
-strcasecmp (const char *s1, const char *s2)
-{
-  while (1)
-    {
-      int c1 = (unsigned char) *(s1++);
-      int c2 = (unsigned char) *(s2++);
-
-      if (isalpha (c1))
-        c1 = tolower (c1);
-      if (isalpha (c2))
-        c2 = tolower (c2);
-
-      if (c1 != '\0' && c1 == c2)
-        continue;
-
-      return (c1 - c2);
-    }
-}
-#endif
-
-#if !HAVE_STRNCASECMP && !HAVE_STRNICMP && !HAVE_STRNCMPI
-/* If we don't have strncasecmp() (from POSIX), or anything that can
-   substitute for it, define our own version.  */
-
-int
-strncasecmp (const char *s1, const char *s2, size_t n)
-{
-  while (n-- > 0)
-    {
-      int c1 = (unsigned char) *(s1++);
-      int c2 = (unsigned char) *(s2++);
-
-      if (isalpha (c1))
-        c1 = tolower (c1);
-      if (isalpha (c2))
-        c2 = tolower (c2);
-
-      if (c1 != '\0' && c1 == c2)
-        continue;
-
-      return (c1 - c2);
-    }
-
-  return 0;
-}
-#endif
-
-
-#ifdef NEED_GET_PATH_MAX
-unsigned int
-get_path_max (void)
-{
-  static unsigned int value;
-
-  if (value == 0)
-    {
-      long x = pathconf ("/", _PC_PATH_MAX);
-      if (x > 0)
-        value = (unsigned int) x;
-      else
-        value = PATH_MAX;
-    }
-
-  return value;
-}
-#endif
-
-#if !HAVE_MEMPCPY
-void *
-mempcpy (void *dest, const void *src, size_t n)
-{
-  return (char *) memcpy (dest, src, n) + n;
-}
-#endif
-
-#if !HAVE_STPCPY
-char *
-stpcpy (char *dest, const char *src)
-{
-  char *d = dest;
-  const char *s = src;
-
-  do
-    *d++ = *s;
-  while (*s++ != '\0');
-
-  return d - 1;
-}
-#endif
-
-#if !HAVE_STRTOLL
-# undef UNSIGNED
-# undef USE_NUMBER_GROUPING
-# undef USE_WIDE_CHAR
-# define QUAD 1
-# include <strtol.c>
-#endif
-
-#if !HAVE_STRERROR
-char *
-strerror (int errnum)
-{
-  static char msg[256];
-
-#define SETMSG(_e, _m) case _e: strcpy(msg, _m); break
-
-  switch (errnum)
-    {
-#ifdef EPERM
-    SETMSG (EPERM  , "Operation not permitted");
-#endif
-#ifdef ENOENT
-    SETMSG (ENOENT , "No such file or directory");
-#endif
-#ifdef ESRCH
-    SETMSG (ESRCH  , "No such process");
-#endif
-#ifdef EINTR
-    SETMSG (EINTR  , "Interrupted system call");
-#endif
-#ifdef EIO
-    SETMSG (EIO    , "I/O error");
-#endif
-#ifdef ENXIO
-    SETMSG (ENXIO  , "No such device or address");
-#endif
-#ifdef E2BIG
-    SETMSG (E2BIG  , "Argument list too long");
-#endif
-#ifdef ENOEXEC
-    SETMSG (ENOEXEC, "Exec format error");
-#endif
-#ifdef EBADF
-    SETMSG (EBADF  , "Bad file number");
-#endif
-#ifdef ECHILD
-    SETMSG (ECHILD , "No child processes");
-#endif
-#ifdef EAGAIN
-    SETMSG (EAGAIN , "Try again");
-#endif
-#ifdef ENOMEM
-    SETMSG (ENOMEM , "Out of memory");
-#endif
-#ifdef EACCES
-    SETMSG (EACCES , "Permission denied");
-#endif
-#ifdef EFAULT
-    SETMSG (EFAULT , "Bad address");
-#endif
-#ifdef ENOTBLK
-    SETMSG (ENOTBLK, "Block device required");
-#endif
-#ifdef EBUSY
-    SETMSG (EBUSY  , "Device or resource busy");
-#endif
-#ifdef EEXIST
-    SETMSG (EEXIST , "File exists");
-#endif
-#ifdef EXDEV
-    SETMSG (EXDEV  , "Cross-device link");
-#endif
-#ifdef ENODEV
-    SETMSG (ENODEV , "No such device");
-#endif
-#ifdef ENOTDIR
-    SETMSG (ENOTDIR, "Not a directory");
-#endif
-#ifdef EISDIR
-    SETMSG (EISDIR , "Is a directory");
-#endif
-#ifdef EINVAL
-    SETMSG (EINVAL , "Invalid argument");
-#endif
-#ifdef ENFILE
-    SETMSG (ENFILE , "File table overflow");
-#endif
-#ifdef EMFILE
-    SETMSG (EMFILE , "Too many open files");
-#endif
-#ifdef ENOTTY
-    SETMSG (ENOTTY , "Not a typewriter");
-#endif
-#ifdef ETXTBSY
-    SETMSG (ETXTBSY, "Text file busy");
-#endif
-#ifdef EFBIG
-    SETMSG (EFBIG  , "File too large");
-#endif
-#ifdef ENOSPC
-    SETMSG (ENOSPC , "No space left on device");
-#endif
-#ifdef ESPIPE
-    SETMSG (ESPIPE , "Illegal seek");
-#endif
-#ifdef EROFS
-    SETMSG (EROFS  , "Read-only file system");
-#endif
-#ifdef EMLINK
-    SETMSG (EMLINK , "Too many links");
-#endif
-#ifdef EPIPE
-    SETMSG (EPIPE  , "Broken pipe");
-#endif
-#ifdef EDOM
-    SETMSG (EDOM   , "Math argument out of domain of func");
-#endif
-#ifdef ERANGE
-    SETMSG (ERANGE , "Math result not representable");
-#endif
-    default: sprintf (msg, "Unknown error %d", errnum); break;
-    }
-
-  return msg;
-}
-#endif