Bug 1547639 - Automatic vendoring of zlib, r=jcj

Differential Revision: https://phabricator.services.mozilla.com/D58499

7 files changed, 69 insertions, 1016 deletions

diff --git a/lib/zlib/README.nss b/lib/zlib/README.nss
index 58ad213a0..ff8307890 100644
--- a/lib/zlib/README.nss
+++ b/lib/zlib/README.nss
@@ -9,10 +9,3 @@ Description:
 
 NSS uses zlib in libSSL (for the DEFLATE compression method), modutil, and
 signtool.
-
-Local Modifications:
-
-- patches/prune-zlib.sh: run this shell script to remove unneeded files
-  from the zlib distribution.
-- patches/msvc-vsnprintf.patch: define HAVE_VSNPRINTF for Visual C++ 2008
-  (9.0) and later.
diff --git a/lib/zlib/config.mk b/lib/zlib/config.mk
index 696be5d4c..9e9fb3179 100644
--- a/lib/zlib/config.mk
+++ b/lib/zlib/config.mk
@@ -8,13 +8,14 @@
 #  are specifed as dependencies within rules.mk.
 #
 
-TARGETS        = $(LIBRARY) $(PROGRAMS)
+TARGETS        = $(LIBRARY)
 SHARED_LIBRARY =
 IMPORT_LIBRARY =
 PROGRAM        =
 
 EXTRA_LIBS     = $(LIBRARY)
 
-ifeq ($(OS_TARGET),Linux)
+ifneq ($(OS_ARCH),WINNT)
 DEFINES += -DHAVE_UNISTD_H
 endif
+DEFINES += -DHAVE_STDARG_H
diff --git a/lib/zlib/example.c b/lib/zlib/example.c
deleted file mode 100644
index 604736f15..000000000
--- a/lib/zlib/example.c
+++ /dev/null
@@ -1,565 +0,0 @@
-/* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-2006 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id$ */
-
-#include "zlib.h"
-#include <stdio.h>
-
-#ifdef STDC
-#  include <string.h>
-#  include <stdlib.h>
-#endif
-
-#if defined(VMS) || defined(RISCOS)
-#  define TESTFILE "foo-gz"
-#else
-#  define TESTFILE "foo.gz"
-#endif
-
-#define CHECK_ERR(err, msg) { \
-    if (err != Z_OK) { \
-        fprintf(stderr, "%s error: %d\n", msg, err); \
-        exit(1); \
-    } \
-}
-
-const char hello[] = "hello, hello!";
-/* "hello world" would be more standard, but the repeated "hello"
- * stresses the compression code better, sorry...
- */
-
-const char dictionary[] = "hello";
-uLong dictId; /* Adler32 value of the dictionary */
-
-void test_compress      OF((Byte *compr, uLong comprLen,
-                            Byte *uncompr, uLong uncomprLen));
-void test_gzio          OF((const char *fname,
-                            Byte *uncompr, uLong uncomprLen));
-void test_deflate       OF((Byte *compr, uLong comprLen));
-void test_inflate       OF((Byte *compr, uLong comprLen,
-                            Byte *uncompr, uLong uncomprLen));
-void test_large_deflate OF((Byte *compr, uLong comprLen,
-                            Byte *uncompr, uLong uncomprLen));
-void test_large_inflate OF((Byte *compr, uLong comprLen,
-                            Byte *uncompr, uLong uncomprLen));
-void test_flush         OF((Byte *compr, uLong *comprLen));
-void test_sync          OF((Byte *compr, uLong comprLen,
-                            Byte *uncompr, uLong uncomprLen));
-void test_dict_deflate  OF((Byte *compr, uLong comprLen));
-void test_dict_inflate  OF((Byte *compr, uLong comprLen,
-                            Byte *uncompr, uLong uncomprLen));
-int  main               OF((int argc, char *argv[]));
-
-/* ===========================================================================
- * Test compress() and uncompress()
- */
-void test_compress(compr, comprLen, uncompr, uncomprLen)
-    Byte *compr, *uncompr;
-    uLong comprLen, uncomprLen;
-{
-    int err;
-    uLong len = (uLong)strlen(hello)+1;
-
-    err = compress(compr, &comprLen, (const Bytef*)hello, len);
-    CHECK_ERR(err, "compress");
-
-    strcpy((char*)uncompr, "garbage");
-
-    err = uncompress(uncompr, &uncomprLen, compr, comprLen);
-    CHECK_ERR(err, "uncompress");
-
-    if (strcmp((char*)uncompr, hello)) {
-        fprintf(stderr, "bad uncompress\n");
-        exit(1);
-    } else {
-        printf("uncompress(): %s\n", (char *)uncompr);
-    }
-}
-
-/* ===========================================================================
- * Test read/write of .gz files
- */
-void test_gzio(fname, uncompr, uncomprLen)
-    const char *fname; /* compressed file name */
-    Byte *uncompr;
-    uLong uncomprLen;
-{
-#ifdef NO_GZCOMPRESS
-    fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n");
-#else
-    int err;
-    int len = (int)strlen(hello)+1;
-    gzFile file;
-    z_off_t pos;
-
-    file = gzopen(fname, "wb");
-    if (file == NULL) {
-        fprintf(stderr, "gzopen error\n");
-        exit(1);
-    }
-    gzputc(file, 'h');
-    if (gzputs(file, "ello") != 4) {
-        fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err));
-        exit(1);
-    }
-    if (gzprintf(file, ", %s!", "hello") != 8) {
-        fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err));
-        exit(1);
-    }
-    gzseek(file, 1L, SEEK_CUR); /* add one zero byte */
-    gzclose(file);
-
-    file = gzopen(fname, "rb");
-    if (file == NULL) {
-        fprintf(stderr, "gzopen error\n");
-        exit(1);
-    }
-    strcpy((char*)uncompr, "garbage");
-
-    if (gzread(file, uncompr, (unsigned)uncomprLen) != len) {
-        fprintf(stderr, "gzread err: %s\n", gzerror(file, &err));
-        exit(1);
-    }
-    if (strcmp((char*)uncompr, hello)) {
-        fprintf(stderr, "bad gzread: %s\n", (char*)uncompr);
-        exit(1);
-    } else {
-        printf("gzread(): %s\n", (char*)uncompr);
-    }
-
-    pos = gzseek(file, -8L, SEEK_CUR);
-    if (pos != 6 || gztell(file) != pos) {
-        fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",
-                (long)pos, (long)gztell(file));
-        exit(1);
-    }
-
-    if (gzgetc(file) != ' ') {
-        fprintf(stderr, "gzgetc error\n");
-        exit(1);
-    }
-
-    if (gzungetc(' ', file) != ' ') {
-        fprintf(stderr, "gzungetc error\n");
-        exit(1);
-    }
-
-    gzgets(file, (char*)uncompr, (int)uncomprLen);
-    if (strlen((char*)uncompr) != 7) { /* " hello!" */
-        fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));
-        exit(1);
-    }
-    if (strcmp((char*)uncompr, hello + 6)) {
-        fprintf(stderr, "bad gzgets after gzseek\n");
-        exit(1);
-    } else {
-        printf("gzgets() after gzseek: %s\n", (char*)uncompr);
-    }
-
-    gzclose(file);
-#endif
-}
-
-/* ===========================================================================
- * Test deflate() with small buffers
- */
-void test_deflate(compr, comprLen)
-    Byte *compr;
-    uLong comprLen;
-{
-    z_stream c_stream; /* compression stream */
-    int err;
-    uLong len = (uLong)strlen(hello)+1;
-
-    c_stream.zalloc = (alloc_func)0;
-    c_stream.zfree = (free_func)0;
-    c_stream.opaque = (voidpf)0;
-
-    err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
-    CHECK_ERR(err, "deflateInit");
-
-    c_stream.next_in  = (Bytef*)hello;
-    c_stream.next_out = compr;
-
-    while (c_stream.total_in != len && c_stream.total_out < comprLen) {
-        c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
-        err = deflate(&c_stream, Z_NO_FLUSH);
-        CHECK_ERR(err, "deflate");
-    }
-    /* Finish the stream, still forcing small buffers: */
-    for (;;) {
-        c_stream.avail_out = 1;
-        err = deflate(&c_stream, Z_FINISH);
-        if (err == Z_STREAM_END) break;
-        CHECK_ERR(err, "deflate");
-    }
-
-    err = deflateEnd(&c_stream);
-    CHECK_ERR(err, "deflateEnd");
-}
-
-/* ===========================================================================
- * Test inflate() with small buffers
- */
-void test_inflate(compr, comprLen, uncompr, uncomprLen)
-    Byte *compr, *uncompr;
-    uLong comprLen, uncomprLen;
-{
-    int err;
-    z_stream d_stream; /* decompression stream */
-
-    strcpy((char*)uncompr, "garbage");
-
-    d_stream.zalloc = (alloc_func)0;
-    d_stream.zfree = (free_func)0;
-    d_stream.opaque = (voidpf)0;
-
-    d_stream.next_in  = compr;
-    d_stream.avail_in = 0;
-    d_stream.next_out = uncompr;
-
-    err = inflateInit(&d_stream);
-    CHECK_ERR(err, "inflateInit");
-
-    while (d_stream.total_out < uncomprLen && d_stream.total_in < comprLen) {
-        d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
-        err = inflate(&d_stream, Z_NO_FLUSH);
-        if (err == Z_STREAM_END) break;
-        CHECK_ERR(err, "inflate");
-    }
-
-    err = inflateEnd(&d_stream);
-    CHECK_ERR(err, "inflateEnd");
-
-    if (strcmp((char*)uncompr, hello)) {
-        fprintf(stderr, "bad inflate\n");
-        exit(1);
-    } else {
-        printf("inflate(): %s\n", (char *)uncompr);
-    }
-}
-
-/* ===========================================================================
- * Test deflate() with large buffers and dynamic change of compression level
- */
-void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
-    Byte *compr, *uncompr;
-    uLong comprLen, uncomprLen;
-{
-    z_stream c_stream; /* compression stream */
-    int err;
-
-    c_stream.zalloc = (alloc_func)0;
-    c_stream.zfree = (free_func)0;
-    c_stream.opaque = (voidpf)0;
-
-    err = deflateInit(&c_stream, Z_BEST_SPEED);
-    CHECK_ERR(err, "deflateInit");
-
-    c_stream.next_out = compr;
-    c_stream.avail_out = (uInt)comprLen;
-
-    /* At this point, uncompr is still mostly zeroes, so it should compress
-     * very well:
-     */
-    c_stream.next_in = uncompr;
-    c_stream.avail_in = (uInt)uncomprLen;
-    err = deflate(&c_stream, Z_NO_FLUSH);
-    CHECK_ERR(err, "deflate");
-    if (c_stream.avail_in != 0) {
-        fprintf(stderr, "deflate not greedy\n");
-        exit(1);
-    }
-
-    /* Feed in already compressed data and switch to no compression: */
-    deflateParams(&c_stream, Z_NO_COMPRESSION, Z_DEFAULT_STRATEGY);
-    c_stream.next_in = compr;
-    c_stream.avail_in = (uInt)comprLen/2;
-    err = deflate(&c_stream, Z_NO_FLUSH);
-    CHECK_ERR(err, "deflate");
-
-    /* Switch back to compressing mode: */
-    deflateParams(&c_stream, Z_BEST_COMPRESSION, Z_FILTERED);
-    c_stream.next_in = uncompr;
-    c_stream.avail_in = (uInt)uncomprLen;
-    err = deflate(&c_stream, Z_NO_FLUSH);
-    CHECK_ERR(err, "deflate");
-
-    err = deflate(&c_stream, Z_FINISH);
-    if (err != Z_STREAM_END) {
-        fprintf(stderr, "deflate should report Z_STREAM_END\n");
-        exit(1);
-    }
-    err = deflateEnd(&c_stream);
-    CHECK_ERR(err, "deflateEnd");
-}
-
-/* ===========================================================================
- * Test inflate() with large buffers
- */
-void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
-    Byte *compr, *uncompr;
-    uLong comprLen, uncomprLen;
-{
-    int err;
-    z_stream d_stream; /* decompression stream */
-
-    strcpy((char*)uncompr, "garbage");
-
-    d_stream.zalloc = (alloc_func)0;
-    d_stream.zfree = (free_func)0;
-    d_stream.opaque = (voidpf)0;
-
-    d_stream.next_in  = compr;
-    d_stream.avail_in = (uInt)comprLen;
-
-    err = inflateInit(&d_stream);
-    CHECK_ERR(err, "inflateInit");
-
-    for (;;) {
-        d_stream.next_out = uncompr;            /* discard the output */
-        d_stream.avail_out = (uInt)uncomprLen;
-        err = inflate(&d_stream, Z_NO_FLUSH);
-        if (err == Z_STREAM_END) break;
-        CHECK_ERR(err, "large inflate");
-    }
-
-    err = inflateEnd(&d_stream);
-    CHECK_ERR(err, "inflateEnd");
-
-    if (d_stream.total_out != 2*uncomprLen + comprLen/2) {
-        fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out);
-        exit(1);
-    } else {
-        printf("large_inflate(): OK\n");
-    }
-}
-
-/* ===========================================================================
- * Test deflate() with full flush
- */
-void test_flush(compr, comprLen)
-    Byte *compr;
-    uLong *comprLen;
-{
-    z_stream c_stream; /* compression stream */
-    int err;
-    uInt len = (uInt)strlen(hello)+1;
-
-    c_stream.zalloc = (alloc_func)0;
-    c_stream.zfree = (free_func)0;
-    c_stream.opaque = (voidpf)0;
-
-    err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
-    CHECK_ERR(err, "deflateInit");
-
-    c_stream.next_in  = (Bytef*)hello;
-    c_stream.next_out = compr;
-    c_stream.avail_in = 3;
-    c_stream.avail_out = (uInt)*comprLen;
-    err = deflate(&c_stream, Z_FULL_FLUSH);
-    CHECK_ERR(err, "deflate");
-
-    compr[3]++; /* force an error in first compressed block */
-    c_stream.avail_in = len - 3;
-
-    err = deflate(&c_stream, Z_FINISH);
-    if (err != Z_STREAM_END) {
-        CHECK_ERR(err, "deflate");
-    }
-    err = deflateEnd(&c_stream);
-    CHECK_ERR(err, "deflateEnd");
-
-    *comprLen = c_stream.total_out;
-}
-
-/* ===========================================================================
- * Test inflateSync()
- */
-void test_sync(compr, comprLen, uncompr, uncomprLen)
-    Byte *compr, *uncompr;
-    uLong comprLen, uncomprLen;
-{
-    int err;
-    z_stream d_stream; /* decompression stream */
-
-    strcpy((char*)uncompr, "garbage");
-
-    d_stream.zalloc = (alloc_func)0;
-    d_stream.zfree = (free_func)0;
-    d_stream.opaque = (voidpf)0;
-
-    d_stream.next_in  = compr;
-    d_stream.avail_in = 2; /* just read the zlib header */
-
-    err = inflateInit(&d_stream);
-    CHECK_ERR(err, "inflateInit");
-
-    d_stream.next_out = uncompr;
-    d_stream.avail_out = (uInt)uncomprLen;
-
-    inflate(&d_stream, Z_NO_FLUSH);
-    CHECK_ERR(err, "inflate");
-
-    d_stream.avail_in = (uInt)comprLen-2;   /* read all compressed data */
-    err = inflateSync(&d_stream);           /* but skip the damaged part */
-    CHECK_ERR(err, "inflateSync");
-
-    err = inflate(&d_stream, Z_FINISH);
-    if (err != Z_DATA_ERROR) {
-        fprintf(stderr, "inflate should report DATA_ERROR\n");
-        /* Because of incorrect adler32 */
-        exit(1);
-    }
-    err = inflateEnd(&d_stream);
-    CHECK_ERR(err, "inflateEnd");
-
-    printf("after inflateSync(): hel%s\n", (char *)uncompr);
-}
-
-/* ===========================================================================
- * Test deflate() with preset dictionary
- */
-void test_dict_deflate(compr, comprLen)
-    Byte *compr;
-    uLong comprLen;
-{
-    z_stream c_stream; /* compression stream */
-    int err;
-
-    c_stream.zalloc = (alloc_func)0;
-    c_stream.zfree = (free_func)0;
-    c_stream.opaque = (voidpf)0;
-
-    err = deflateInit(&c_stream, Z_BEST_COMPRESSION);
-    CHECK_ERR(err, "deflateInit");
-
-    err = deflateSetDictionary(&c_stream,
-                               (const Bytef*)dictionary, sizeof(dictionary));
-    CHECK_ERR(err, "deflateSetDictionary");
-
-    dictId = c_stream.adler;
-    c_stream.next_out = compr;
-    c_stream.avail_out = (uInt)comprLen;
-
-    c_stream.next_in = (Bytef*)hello;
-    c_stream.avail_in = (uInt)strlen(hello)+1;
-
-    err = deflate(&c_stream, Z_FINISH);
-    if (err != Z_STREAM_END) {
-        fprintf(stderr, "deflate should report Z_STREAM_END\n");
-        exit(1);
-    }
-    err = deflateEnd(&c_stream);
-    CHECK_ERR(err, "deflateEnd");
-}
-
-/* ===========================================================================
- * Test inflate() with a preset dictionary
- */
-void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
-    Byte *compr, *uncompr;
-    uLong comprLen, uncomprLen;
-{
-    int err;
-    z_stream d_stream; /* decompression stream */
-
-    strcpy((char*)uncompr, "garbage");
-
-    d_stream.zalloc = (alloc_func)0;
-    d_stream.zfree = (free_func)0;
-    d_stream.opaque = (voidpf)0;
-
-    d_stream.next_in  = compr;
-    d_stream.avail_in = (uInt)comprLen;
-
-    err = inflateInit(&d_stream);
-    CHECK_ERR(err, "inflateInit");
-
-    d_stream.next_out = uncompr;
-    d_stream.avail_out = (uInt)uncomprLen;
-
-    for (;;) {
-        err = inflate(&d_stream, Z_NO_FLUSH);
-        if (err == Z_STREAM_END) break;
-        if (err == Z_NEED_DICT) {
-            if (d_stream.adler != dictId) {
-                fprintf(stderr, "unexpected dictionary");
-                exit(1);
-            }
-            err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary,
-                                       sizeof(dictionary));
-        }
-        CHECK_ERR(err, "inflate with dict");
-    }
-
-    err = inflateEnd(&d_stream);
-    CHECK_ERR(err, "inflateEnd");
-
-    if (strcmp((char*)uncompr, hello)) {
-        fprintf(stderr, "bad inflate with dict\n");
-        exit(1);
-    } else {
-        printf("inflate with dictionary: %s\n", (char *)uncompr);
-    }
-}
-
-/* ===========================================================================
- * Usage:  example [output.gz  [input.gz]]
- */
-
-int main(argc, argv)
-    int argc;
-    char *argv[];
-{
-    Byte *compr, *uncompr;
-    uLong comprLen = 10000*sizeof(int); /* don't overflow on MSDOS */
-    uLong uncomprLen = comprLen;
-    static const char* myVersion = ZLIB_VERSION;
-
-    if (zlibVersion()[0] != myVersion[0]) {
-        fprintf(stderr, "incompatible zlib version\n");
-        exit(1);
-
-    } else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) {
-        fprintf(stderr, "warning: different zlib version\n");
-    }
-
-    printf("zlib version %s = 0x%04x, compile flags = 0x%lx\n",
-            ZLIB_VERSION, ZLIB_VERNUM, zlibCompileFlags());
-
-    compr    = (Byte*)calloc((uInt)comprLen, 1);
-    uncompr  = (Byte*)calloc((uInt)uncomprLen, 1);
-    /* compr and uncompr are cleared to avoid reading uninitialized
-     * data and to ensure that uncompr compresses well.
-     */
-    if (compr == Z_NULL || uncompr == Z_NULL) {
-        printf("out of memory\n");
-        exit(1);
-    }
-    test_compress(compr, comprLen, uncompr, uncomprLen);
-
-    test_gzio((argc > 1 ? argv[1] : TESTFILE),
-              uncompr, uncomprLen);
-
-    test_deflate(compr, comprLen);
-    test_inflate(compr, comprLen, uncompr, uncomprLen);
-
-    test_large_deflate(compr, comprLen, uncompr, uncomprLen);
-    test_large_inflate(compr, comprLen, uncompr, uncomprLen);
-
-    test_flush(compr, &comprLen);
-    test_sync(compr, comprLen, uncompr, uncomprLen);
-    comprLen = uncomprLen;
-
-    test_dict_deflate(compr, comprLen);
-    test_dict_inflate(compr, comprLen, uncompr, uncomprLen);
-
-    free(compr);
-    free(uncompr);
-
-    return 0;
-}
diff --git a/lib/zlib/manifest.mn b/lib/zlib/manifest.mn
index 2118f8d4f..879c9fb24 100644
--- a/lib/zlib/manifest.mn
+++ b/lib/zlib/manifest.mn
@@ -28,8 +28,6 @@ CSRCS =	adler32.c 	\
 
 LIBRARY_NAME = zlib
 
-PROGRAMS = example minigzip
-
 # REQUIRES = nss
 
 # Define verbose as -1 to turn off all zlib trace messages in
diff --git a/lib/zlib/minigzip.c b/lib/zlib/minigzip.c
deleted file mode 100644
index 9825ccc3a..000000000
--- a/lib/zlib/minigzip.c
+++ /dev/null
@@ -1,440 +0,0 @@
-/* minigzip.c -- simulate gzip using the zlib compression library
- * Copyright (C) 1995-2006, 2010 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/*
- * minigzip is a minimal implementation of the gzip utility. This is
- * only an example of using zlib and isn't meant to replace the
- * full-featured gzip. No attempt is made to deal with file systems
- * limiting names to 14 or 8+3 characters, etc... Error checking is
- * very limited. So use minigzip only for testing; use gzip for the
- * real thing. On MSDOS, use only on file names without extension
- * or in pipe mode.
- */
-
-/* @(#) $Id$ */
-
-#include "zlib.h"
-#include <stdio.h>
-
-#ifdef STDC
-#  include <string.h>
-#  include <stdlib.h>
-#endif
-
-#ifdef USE_MMAP
-#  include <sys/types.h>
-#  include <sys/mman.h>
-#  include <sys/stat.h>
-#endif
-
-#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
-#  include <fcntl.h>
-#  include <io.h>
-#  ifdef UNDER_CE
-#    include <stdlib.h>
-#  endif
-#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
-#else
-#  define SET_BINARY_MODE(file)
-#endif
-
-#ifdef VMS
-#  define unlink delete
-#  define GZ_SUFFIX "-gz"
-#endif
-#ifdef RISCOS
-#  define unlink remove
-#  define GZ_SUFFIX "-gz"
-#  define fileno(file) file->__file
-#endif
-#if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
-#  include <unix.h> /* for fileno */
-#endif
-
-#if !defined(Z_HAVE_UNISTD_H) && !defined(_LARGEFILE64_SOURCE)
-#ifndef WIN32 /* unlink already in stdio.h for WIN32 */
-  extern int unlink OF((const char *));
-#endif
-#endif
-
-#if defined(UNDER_CE)
-#  include <windows.h>
-#  define perror(s) pwinerror(s)
-
-/* Map the Windows error number in ERROR to a locale-dependent error
-   message string and return a pointer to it.  Typically, the values
-   for ERROR come from GetLastError.
-
-   The string pointed to shall not be modified by the application,
-   but may be overwritten by a subsequent call to strwinerror
-
-   The strwinerror function does not change the current setting
-   of GetLastError.  */
-
-static char *strwinerror (error)
-     DWORD error;
-{
-    static char buf[1024];
-
-    wchar_t *msgbuf;
-    DWORD lasterr = GetLastError();
-    DWORD chars = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM
-        | FORMAT_MESSAGE_ALLOCATE_BUFFER,
-        NULL,
-        error,
-        0, /* Default language */
-        (LPVOID)&msgbuf,
-        0,
-        NULL);
-    if (chars != 0) {
-        /* If there is an \r\n appended, zap it.  */
-        if (chars >= 2
-            && msgbuf[chars - 2] == '\r' && msgbuf[chars - 1] == '\n') {
-            chars -= 2;
-            msgbuf[chars] = 0;
-        }
-
-        if (chars > sizeof (buf) - 1) {
-            chars = sizeof (buf) - 1;
-            msgbuf[chars] = 0;
-        }
-
-        wcstombs(buf, msgbuf, chars + 1);
-        LocalFree(msgbuf);
-    }
-    else {
-        sprintf(buf, "unknown win32 error (%ld)", error);
-    }
-
-    SetLastError(lasterr);
-    return buf;
-}
-
-static void pwinerror (s)
-    const char *s;
-{
-    if (s && *s)
-        fprintf(stderr, "%s: %s\n", s, strwinerror(GetLastError ()));
-    else
-        fprintf(stderr, "%s\n", strwinerror(GetLastError ()));
-}
-
-#endif /* UNDER_CE */
-
-#ifndef GZ_SUFFIX
-#  define GZ_SUFFIX ".gz"
-#endif
-#define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1)
-
-#define BUFLEN      16384
-#define MAX_NAME_LEN 1024
-
-#ifdef MAXSEG_64K
-#  define local static
-   /* Needed for systems with limitation on stack size. */
-#else
-#  define local
-#endif
-
-char *prog;
-
-void error            OF((const char *msg));
-void gz_compress      OF((FILE   *in, gzFile out));
-#ifdef USE_MMAP
-int  gz_compress_mmap OF((FILE   *in, gzFile out));
-#endif
-void gz_uncompress    OF((gzFile in, FILE   *out));
-void file_compress    OF((char  *file, char *mode));
-void file_uncompress  OF((char  *file));
-int  main             OF((int argc, char *argv[]));
-
-/* ===========================================================================
- * Display error message and exit
- */
-void error(msg)
-    const char *msg;
-{
-    fprintf(stderr, "%s: %s\n", prog, msg);
-    exit(1);
-}
-
-/* ===========================================================================
- * Compress input to output then close both files.
- */
-
-void gz_compress(in, out)
-    FILE   *in;
-    gzFile out;
-{
-    local char buf[BUFLEN];
-    int len;
-    int err;
-
-#ifdef USE_MMAP
-    /* Try first compressing with mmap. If mmap fails (minigzip used in a
-     * pipe), use the normal fread loop.
-     */
-    if (gz_compress_mmap(in, out) == Z_OK) return;
-#endif
-    for (;;) {
-        len = (int)fread(buf, 1, sizeof(buf), in);
-        if (ferror(in)) {
-            perror("fread");
-            exit(1);
-        }
-        if (len == 0) break;
-
-        if (gzwrite(out, buf, (unsigned)len) != len) error(gzerror(out, &err));
-    }
-    fclose(in);
-    if (gzclose(out) != Z_OK) error("failed gzclose");
-}
-
-#ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */
-
-/* Try compressing the input file at once using mmap. Return Z_OK if
- * if success, Z_ERRNO otherwise.
- */
-int gz_compress_mmap(in, out)
-    FILE   *in;
-    gzFile out;
-{
-    int len;
-    int err;
-    int ifd = fileno(in);
-    caddr_t buf;    /* mmap'ed buffer for the entire input file */
-    off_t buf_len;  /* length of the input file */
-    struct stat sb;
-
-    /* Determine the size of the file, needed for mmap: */
-    if (fstat(ifd, &sb) < 0) return Z_ERRNO;
-    buf_len = sb.st_size;
-    if (buf_len <= 0) return Z_ERRNO;
-
-    /* Now do the actual mmap: */
-    buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0);
-    if (buf == (caddr_t)(-1)) return Z_ERRNO;
-
-    /* Compress the whole file at once: */
-    len = gzwrite(out, (char *)buf, (unsigned)buf_len);
-
-    if (len != (int)buf_len) error(gzerror(out, &err));
-
-    munmap(buf, buf_len);
-    fclose(in);
-    if (gzclose(out) != Z_OK) error("failed gzclose");
-    return Z_OK;
-}
-#endif /* USE_MMAP */
-
-/* ===========================================================================
- * Uncompress input to output then close both files.
- */
-void gz_uncompress(in, out)
-    gzFile in;
-    FILE   *out;
-{
-    local char buf[BUFLEN];
-    int len;
-    int err;
-
-    for (;;) {
-        len = gzread(in, buf, sizeof(buf));
-        if (len < 0) error (gzerror(in, &err));
-        if (len == 0) break;
-
-        if ((int)fwrite(buf, 1, (unsigned)len, out) != len) {
-            error("failed fwrite");
-        }
-    }
-    if (fclose(out)) error("failed fclose");
-
-    if (gzclose(in) != Z_OK) error("failed gzclose");
-}
-
-
-/* ===========================================================================
- * Compress the given file: create a corresponding .gz file and remove the
- * original.
- */
-void file_compress(file, mode)
-    char  *file;
-    char  *mode;
-{
-    local char outfile[MAX_NAME_LEN];
-    FILE  *in;
-    gzFile out;
-
-    if (strlen(file) + strlen(GZ_SUFFIX) >= sizeof(outfile)) {
-        fprintf(stderr, "%s: filename too long\n", prog);
-        exit(1);
-    }
-
-    strcpy(outfile, file);
-    strcat(outfile, GZ_SUFFIX);
-
-    in = fopen(file, "rb");
-    if (in == NULL) {
-        perror(file);
-        exit(1);
-    }
-    out = gzopen(outfile, mode);
-    if (out == NULL) {
-        fprintf(stderr, "%s: can't gzopen %s\n", prog, outfile);
-        exit(1);
-    }
-    gz_compress(in, out);
-
-    unlink(file);
-}
-
-
-/* ===========================================================================
- * Uncompress the given file and remove the original.
- */
-void file_uncompress(file)
-    char  *file;
-{
-    local char buf[MAX_NAME_LEN];
-    char *infile, *outfile;
-    FILE  *out;
-    gzFile in;
-    size_t len = strlen(file);
-
-    if (len + strlen(GZ_SUFFIX) >= sizeof(buf)) {
-        fprintf(stderr, "%s: filename too long\n", prog);
-        exit(1);
-    }
-
-    strcpy(buf, file);
-
-    if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) {
-        infile = file;
-        outfile = buf;
-        outfile[len-3] = '\0';
-    } else {
-        outfile = file;
-        infile = buf;
-        strcat(infile, GZ_SUFFIX);
-    }
-    in = gzopen(infile, "rb");
-    if (in == NULL) {
-        fprintf(stderr, "%s: can't gzopen %s\n", prog, infile);
-        exit(1);
-    }
-    out = fopen(outfile, "wb");
-    if (out == NULL) {
-        perror(file);
-        exit(1);
-    }
-
-    gz_uncompress(in, out);
-
-    unlink(infile);
-}
-
-
-/* ===========================================================================
- * Usage:  minigzip [-c] [-d] [-f] [-h] [-r] [-1 to -9] [files...]
- *   -c : write to standard output
- *   -d : decompress
- *   -f : compress with Z_FILTERED
- *   -h : compress with Z_HUFFMAN_ONLY
- *   -r : compress with Z_RLE
- *   -1 to -9 : compression level
- */
-
-int main(argc, argv)
-    int argc;
-    char *argv[];
-{
-    int copyout = 0;
-    int uncompr = 0;
-    gzFile file;
-    char *bname, outmode[20];
-
-    strcpy(outmode, "wb6 ");
-
-    prog = argv[0];
-    bname = strrchr(argv[0], '/');
-    if (bname)
-      bname++;
-    else
-      bname = argv[0];
-    argc--, argv++;
-
-    if (!strcmp(bname, "gunzip"))
-      uncompr = 1;
-    else if (!strcmp(bname, "zcat"))
-      copyout = uncompr = 1;
-
-    while (argc > 0) {
-      if (strcmp(*argv, "-c") == 0)
-        copyout = 1;
-      else if (strcmp(*argv, "-d") == 0)
-        uncompr = 1;
-      else if (strcmp(*argv, "-f") == 0)
-        outmode[3] = 'f';
-      else if (strcmp(*argv, "-h") == 0)
-        outmode[3] = 'h';
-      else if (strcmp(*argv, "-r") == 0)
-        outmode[3] = 'R';
-      else if ((*argv)[0] == '-' && (*argv)[1] >= '1' && (*argv)[1] <= '9' &&
-               (*argv)[2] == 0)
-        outmode[2] = (*argv)[1];
-      else
-        break;
-      argc--, argv++;
-    }
-    if (outmode[3] == ' ')
-        outmode[3] = 0;
-    if (argc == 0) {
-        SET_BINARY_MODE(stdin);
-        SET_BINARY_MODE(stdout);
-        if (uncompr) {
-            file = gzdopen(fileno(stdin), "rb");
-            if (file == NULL) error("can't gzdopen stdin");
-            gz_uncompress(file, stdout);
-        } else {
-            file = gzdopen(fileno(stdout), outmode);
-            if (file == NULL) error("can't gzdopen stdout");
-            gz_compress(stdin, file);
-        }
-    } else {
-        if (copyout) {
-            SET_BINARY_MODE(stdout);
-        }
-        do {
-            if (uncompr) {
-                if (copyout) {
-                    file = gzopen(*argv, "rb");
-                    if (file == NULL)
-                        fprintf(stderr, "%s: can't gzopen %s\n", prog, *argv);
-                    else
-                        gz_uncompress(file, stdout);
-                } else {
-                    file_uncompress(*argv);
-                }
-            } else {
-                if (copyout) {
-                    FILE * in = fopen(*argv, "rb");
-
-                    if (in == NULL) {
-                        perror(*argv);
-                    } else {
-                        file = gzdopen(fileno(stdout), outmode);
-                        if (file == NULL) error("can't gzdopen stdout");
-
-                        gz_compress(in, file);
-                    }
-
-                } else {
-                    file_compress(*argv, outmode);
-                }
-            }
-        } while (argv++, --argc);
-    }
-    return 0;
-}
diff --git a/lib/zlib/vendor.sh b/lib/zlib/vendor.sh
new file mode 100644
index 000000000..01d75e624
--- /dev/null
+++ b/lib/zlib/vendor.sh
@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+# Vendor a new version of zlib.
+#
+# Note: This script doesn't remove files if they are removed in the zlib release.
+
+set -e
+
+if [[ $# -lt 1 ]]; then
+    echo "Usage: $0 <version>" 1>&2
+    exit 2
+fi
+
+version="$1"
+ztmp="zlib.$version"
+
+cd "$(dirname "$0")"
+../../fuzz/config/git-copy.sh https://github.com/madler/zlib "v$version" "$ztmp"
+fullversion="$version ("$(cat "$ztmp"/.git-copy)")"
+sed -i -e 's/^Version: .*/Version: '"$fullversion"'/' README.nss
+
+prune=(
+    .git-copy
+    .gitignore
+    CMakeLists.txt
+    ChangeLog
+    FAQ
+    INDEX
+    Makefile
+    Makefile.in
+    amiga
+    configure
+    contrib
+    doc
+    example.c
+    examples
+    make_vms.com
+    minigzip.c
+    msdos
+    nintendods
+    old
+    os400
+    qnx
+    test
+    treebuild.xml
+    watcom
+    win32
+    zconf.h.cmakein
+    zconf.h.in
+    zlib.3
+    zlib.3.pdf
+    zlib.map
+    zlib.pc.cmakein
+    zlib.pc.in
+    zlib2ansi
+)
+for i in "${prune[@]}"; do rm -rf "$ztmp"/"$i"; done
+for i in "$ztmp"/*; do mv "$i" .; done
+rmdir "$ztmp"
diff --git a/lib/zlib/zlib.gyp b/lib/zlib/zlib.gyp
index c89dbd96c..07df9a861 100644
--- a/lib/zlib/zlib.gyp
+++ b/lib/zlib/zlib.gyp
@@ -42,6 +42,14 @@
           # Define verbose as -1 to turn off all zlib trace messages in
           # debug builds.
           'verbose=-1',
+          'HAVE_STDARG_H',
+        ],
+        'conditions': [
+          [ 'OS!="win"', {
+            'defines': [
+              'HAVE_UNISTD_H',
+            ],
+          }],
         ],
       }],
     }]