Qt/QML edition

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Frequently Asked Questions about ZLIB1.DLL
This document describes the design, the rationale, and the usage
of the official DLL build of zlib, named ZLIB1.DLL. If you have
general questions about zlib, you should see the file "FAQ" found
in the zlib distribution, or at the following location:
http://www.gzip.org/zlib/zlib_faq.html
1. What is ZLIB1.DLL, and how can I get it?
- ZLIB1.DLL is the official build of zlib as a DLL.
(Please remark the character '1' in the name.)
Pointers to a precompiled ZLIB1.DLL can be found in the zlib
web site at:
http://www.zlib.net/
Applications that link to ZLIB1.DLL can rely on the following
specification:
* The exported symbols are exclusively defined in the source
files "zlib.h" and "zlib.def", found in an official zlib
source distribution.
* The symbols are exported by name, not by ordinal.
* The exported names are undecorated.
* The calling convention of functions is "C" (CDECL).
* The ZLIB1.DLL binary is linked to MSVCRT.DLL.
The archive in which ZLIB1.DLL is bundled contains compiled
test programs that must run with a valid build of ZLIB1.DLL.
It is recommended to download the prebuilt DLL from the zlib
web site, instead of building it yourself, to avoid potential
incompatibilities that could be introduced by your compiler
and build settings. If you do build the DLL yourself, please
make sure that it complies with all the above requirements,
and it runs with the precompiled test programs, bundled with
the original ZLIB1.DLL distribution.
If, for any reason, you need to build an incompatible DLL,
please use a different file name.
2. Why did you change the name of the DLL to ZLIB1.DLL?
What happened to the old ZLIB.DLL?
- The old ZLIB.DLL, built from zlib-1.1.4 or earlier, required
compilation settings that were incompatible to those used by
a static build. The DLL settings were supposed to be enabled
by defining the macro ZLIB_DLL, before including "zlib.h".
Incorrect handling of this macro was silently accepted at
build time, resulting in two major problems:
* ZLIB_DLL was missing from the old makefile. When building
the DLL, not all people added it to the build options. In
consequence, incompatible incarnations of ZLIB.DLL started
to circulate around the net.
* When switching from using the static library to using the
DLL, applications had to define the ZLIB_DLL macro and
to recompile all the sources that contained calls to zlib
functions. Failure to do so resulted in creating binaries
that were unable to run with the official ZLIB.DLL build.
The only possible solution that we could foresee was to make
a binary-incompatible change in the DLL interface, in order to
remove the dependency on the ZLIB_DLL macro, and to release
the new DLL under a different name.
We chose the name ZLIB1.DLL, where '1' indicates the major
zlib version number. We hope that we will not have to break
the binary compatibility again, at least not as long as the
zlib-1.x series will last.
There is still a ZLIB_DLL macro, that can trigger a more
efficient build and use of the DLL, but compatibility no
longer dependents on it.
3. Can I build ZLIB.DLL from the new zlib sources, and replace
an old ZLIB.DLL, that was built from zlib-1.1.4 or earlier?
- In principle, you can do it by assigning calling convention
keywords to the macros ZEXPORT and ZEXPORTVA. In practice,
it depends on what you mean by "an old ZLIB.DLL", because the
old DLL exists in several mutually-incompatible versions.
You have to find out first what kind of calling convention is
being used in your particular ZLIB.DLL build, and to use the
same one in the new build. If you don't know what this is all
about, you might be better off if you would just leave the old
DLL intact.
4. Can I compile my application using the new zlib interface, and
link it to an old ZLIB.DLL, that was built from zlib-1.1.4 or
earlier?
- The official answer is "no"; the real answer depends again on
what kind of ZLIB.DLL you have. Even if you are lucky, this
course of action is unreliable.
If you rebuild your application and you intend to use a newer
version of zlib (post- 1.1.4), it is strongly recommended to
link it to the new ZLIB1.DLL.
5. Why are the zlib symbols exported by name, and not by ordinal?
- Although exporting symbols by ordinal is a little faster, it
is risky. Any single glitch in the maintenance or use of the
DEF file that contains the ordinals can result in incompatible
builds and frustrating crashes. Simply put, the benefits of
exporting symbols by ordinal do not justify the risks.
Technically, it should be possible to maintain ordinals in
the DEF file, and still export the symbols by name. Ordinals
exist in every DLL, and even if the dynamic linking performed
at the DLL startup is searching for names, ordinals serve as
hints, for a faster name lookup. However, if the DEF file
contains ordinals, the Microsoft linker automatically builds
an implib that will cause the executables linked to it to use
those ordinals, and not the names. It is interesting to
notice that the GNU linker for Win32 does not suffer from this
problem.
It is possible to avoid the DEF file if the exported symbols
are accompanied by a "__declspec(dllexport)" attribute in the
source files. You can do this in zlib by predefining the
ZLIB_DLL macro.
6. I see that the ZLIB1.DLL functions use the "C" (CDECL) calling
convention. Why not use the STDCALL convention?
STDCALL is the standard convention in Win32, and I need it in
my Visual Basic project!
(For readability, we use CDECL to refer to the convention
triggered by the "__cdecl" keyword, STDCALL to refer to
the convention triggered by "__stdcall", and FASTCALL to
refer to the convention triggered by "__fastcall".)
- Most of the native Windows API functions (without varargs) use
indeed the WINAPI convention (which translates to STDCALL in
Win32), but the standard C functions use CDECL. If a user
application is intrinsically tied to the Windows API (e.g.
it calls native Windows API functions such as CreateFile()),
sometimes it makes sense to decorate its own functions with
WINAPI. But if ANSI C or POSIX portability is a goal (e.g.
it calls standard C functions such as fopen()), it is not a
sound decision to request the inclusion of <windows.h>, or to
use non-ANSI constructs, for the sole purpose to make the user
functions STDCALL-able.
The functionality offered by zlib is not in the category of
"Windows functionality", but is more like "C functionality".
Technically, STDCALL is not bad; in fact, it is slightly
faster than CDECL, and it works with variable-argument
functions, just like CDECL. It is unfortunate that, in spite
of using STDCALL in the Windows API, it is not the default
convention used by the C compilers that run under Windows.
The roots of the problem reside deep inside the unsafety of
the K&R-style function prototypes, where the argument types
are not specified; but that is another story for another day.
The remaining fact is that CDECL is the default convention.
Even if an explicit convention is hard-coded into the function
prototypes inside C headers, problems may appear. The
necessity to expose the convention in users' callbacks is one
of these problems.
The calling convention issues are also important when using
zlib in other programming languages. Some of them, like Ada
(GNAT) and Fortran (GNU G77), have C bindings implemented
initially on Unix, and relying on the C calling convention.
On the other hand, the pre- .NET versions of Microsoft Visual
Basic require STDCALL, while Borland Delphi prefers, although
it does not require, FASTCALL.
In fairness to all possible uses of zlib outside the C
programming language, we choose the default "C" convention.
Anyone interested in different bindings or conventions is
encouraged to maintain specialized projects. The "contrib/"
directory from the zlib distribution already holds a couple
of foreign bindings, such as Ada, C++, and Delphi.
7. I need a DLL for my Visual Basic project. What can I do?
- Define the ZLIB_WINAPI macro before including "zlib.h", when
building both the DLL and the user application (except that
you don't need to define anything when using the DLL in Visual
Basic). The ZLIB_WINAPI macro will switch on the WINAPI
(STDCALL) convention. The name of this DLL must be different
than the official ZLIB1.DLL.
Gilles Vollant has contributed a build named ZLIBWAPI.DLL,
with the ZLIB_WINAPI macro turned on, and with the minizip
functionality built in. For more information, please read
the notes inside "contrib/vstudio/readme.txt", found in the
zlib distribution.
8. I need to use zlib in my Microsoft .NET project. What can I
do?
- Henrik Ravn has contributed a .NET wrapper around zlib. Look
into contrib/dotzlib/, inside the zlib distribution.
9. If my application uses ZLIB1.DLL, should I link it to
MSVCRT.DLL? Why?
- It is not required, but it is recommended to link your
application to MSVCRT.DLL, if it uses ZLIB1.DLL.
The executables (.EXE, .DLL, etc.) that are involved in the
same process and are using the C run-time library (i.e. they
are calling standard C functions), must link to the same
library. There are several libraries in the Win32 system:
CRTDLL.DLL, MSVCRT.DLL, the static C libraries, etc.
Since ZLIB1.DLL is linked to MSVCRT.DLL, the executables that
depend on it should also be linked to MSVCRT.DLL.
10. Why are you saying that ZLIB1.DLL and my application should
be linked to the same C run-time (CRT) library? I linked my
application and my DLLs to different C libraries (e.g. my
application to a static library, and my DLLs to MSVCRT.DLL),
and everything works fine.
- If a user library invokes only pure Win32 API (accessible via
<windows.h> and the related headers), its DLL build will work
in any context. But if this library invokes standard C API,
things get more complicated.
There is a single Win32 library in a Win32 system. Every
function in this library resides in a single DLL module, that
is safe to call from anywhere. On the other hand, there are
multiple versions of the C library, and each of them has its
own separate internal state. Standalone executables and user
DLLs that call standard C functions must link to a C run-time
(CRT) library, be it static or shared (DLL). Intermixing
occurs when an executable (not necessarily standalone) and a
DLL are linked to different CRTs, and both are running in the
same process.
Intermixing multiple CRTs is possible, as long as their
internal states are kept intact. The Microsoft Knowledge Base
articles KB94248 "HOWTO: Use the C Run-Time" and KB140584
"HOWTO: Link with the Correct C Run-Time (CRT) Library"
mention the potential problems raised by intermixing.
If intermixing works for you, it's because your application
and DLLs are avoiding the corruption of each of the CRTs'
internal states, maybe by careful design, or maybe by fortune.
Also note that linking ZLIB1.DLL to non-Microsoft CRTs, such
as those provided by Borland, raises similar problems.
11. Why are you linking ZLIB1.DLL to MSVCRT.DLL?
- MSVCRT.DLL exists on every Windows 95 with a new service pack
installed, or with Microsoft Internet Explorer 4 or later, and
on all other Windows 4.x or later (Windows 98, Windows NT 4,
or later). It is freely distributable; if not present in the
system, it can be downloaded from Microsoft or from other
software provider for free.
The fact that MSVCRT.DLL does not exist on a virgin Windows 95
is not so problematic. Windows 95 is scarcely found nowadays,
Microsoft ended its support a long time ago, and many recent
applications from various vendors, including Microsoft, do not
even run on it. Furthermore, no serious user should run
Windows 95 without a proper update installed.
12. Why are you not linking ZLIB1.DLL to
<<my favorite C run-time library>> ?
- We considered and abandoned the following alternatives:
* Linking ZLIB1.DLL to a static C library (LIBC.LIB, or
LIBCMT.LIB) is not a good option. People are using the DLL
mainly to save disk space. If you are linking your program
to a static C library, you may as well consider linking zlib
in statically, too.
* Linking ZLIB1.DLL to CRTDLL.DLL looks appealing, because
CRTDLL.DLL is present on every Win32 installation.
Unfortunately, it has a series of problems: it does not
work properly with Microsoft's C++ libraries, it does not
provide support for 64-bit file offsets, (and so on...),
and Microsoft discontinued its support a long time ago.
* Linking ZLIB1.DLL to MSVCR70.DLL or MSVCR71.DLL, supplied
with the Microsoft .NET platform, and Visual C++ 7.0/7.1,
raises problems related to the status of ZLIB1.DLL as a
system component. According to the Microsoft Knowledge Base
article KB326922 "INFO: Redistribution of the Shared C
Runtime Component in Visual C++ .NET", MSVCR70.DLL and
MSVCR71.DLL are not supposed to function as system DLLs,
because they may clash with MSVCRT.DLL. Instead, the
application's installer is supposed to put these DLLs
(if needed) in the application's private directory.
If ZLIB1.DLL depends on a non-system runtime, it cannot
function as a redistributable system component.
* Linking ZLIB1.DLL to non-Microsoft runtimes, such as
Borland's, or Cygwin's, raises problems related to the
reliable presence of these runtimes on Win32 systems.
It's easier to let the DLL build of zlib up to the people
who distribute these runtimes, and who may proceed as
explained in the answer to Question 14.
13. If ZLIB1.DLL cannot be linked to MSVCR70.DLL or MSVCR71.DLL,
how can I build/use ZLIB1.DLL in Microsoft Visual C++ 7.0
(Visual Studio .NET) or newer?
- Due to the problems explained in the Microsoft Knowledge Base
article KB326922 (see the previous answer), the C runtime that
comes with the VC7 environment is no longer considered a
system component. That is, it should not be assumed that this
runtime exists, or may be installed in a system directory.
Since ZLIB1.DLL is supposed to be a system component, it may
not depend on a non-system component.
In order to link ZLIB1.DLL and your application to MSVCRT.DLL
in VC7, you need the library of Visual C++ 6.0 or older. If
you don't have this library at hand, it's probably best not to
use ZLIB1.DLL.
We are hoping that, in the future, Microsoft will provide a
way to build applications linked to a proper system runtime,
from the Visual C++ environment. Until then, you have a
couple of alternatives, such as linking zlib in statically.
If your application requires dynamic linking, you may proceed
as explained in the answer to Question 14.
14. I need to link my own DLL build to a CRT different than
MSVCRT.DLL. What can I do?
- Feel free to rebuild the DLL from the zlib sources, and link
it the way you want. You should, however, clearly state that
your build is unofficial. You should give it a different file
name, and/or install it in a private directory that can be
accessed by your application only, and is not visible to the
others (i.e. it's neither in the PATH, nor in the SYSTEM or
SYSTEM32 directories). Otherwise, your build may clash with
applications that link to the official build.
For example, in Cygwin, zlib is linked to the Cygwin runtime
CYGWIN1.DLL, and it is distributed under the name CYGZ.DLL.
15. May I include additional pieces of code that I find useful,
link them in ZLIB1.DLL, and export them?
- No. A legitimate build of ZLIB1.DLL must not include code
that does not originate from the official zlib source code.
But you can make your own private DLL build, under a different
file name, as suggested in the previous answer.
For example, zlib is a part of the VCL library, distributed
with Borland Delphi and C++ Builder. The DLL build of VCL
is a redistributable file, named VCLxx.DLL.
16. May I remove some functionality out of ZLIB1.DLL, by enabling
macros like NO_GZCOMPRESS or NO_GZIP at compile time?
- No. A legitimate build of ZLIB1.DLL must provide the complete
zlib functionality, as implemented in the official zlib source
code. But you can make your own private DLL build, under a
different file name, as suggested in the previous answer.
17. I made my own ZLIB1.DLL build. Can I test it for compliance?
- We prefer that you download the official DLL from the zlib
web site. If you need something peculiar from this DLL, you
can send your suggestion to the zlib mailing list.
However, in case you do rebuild the DLL yourself, you can run
it with the test programs found in the DLL distribution.
Running these test programs is not a guarantee of compliance,
but a failure can imply a detected problem.
**
This document is written and maintained by
Cosmin Truta <cosmint@cs.ubbcluj.ro>

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# Makefile for zlib
# Borland C++ for Win32
#
# Usage:
# make -f win32/Makefile.bor
# make -f win32/Makefile.bor LOCAL_ZLIB=-DASMV OBJA=match.obj OBJPA=+match.obj
# ------------ Borland C++ ------------
# Optional nonstandard preprocessor flags (e.g. -DMAX_MEM_LEVEL=7)
# should be added to the environment via "set LOCAL_ZLIB=-DFOO" or
# added to the declaration of LOC here:
LOC = $(LOCAL_ZLIB)
CC = bcc32
AS = bcc32
LD = bcc32
AR = tlib
CFLAGS = -a -d -k- -O2 $(LOC)
ASFLAGS = $(LOC)
LDFLAGS = $(LOC)
# variables
ZLIB_LIB = zlib.lib
OBJ1 = adler32.obj compress.obj crc32.obj deflate.obj gzclose.obj gzlib.obj gzread.obj
OBJ2 = gzwrite.obj infback.obj inffast.obj inflate.obj inftrees.obj trees.obj uncompr.obj zutil.obj
#OBJA =
OBJP1 = +adler32.obj+compress.obj+crc32.obj+deflate.obj+gzclose.obj+gzlib.obj+gzread.obj
OBJP2 = +gzwrite.obj+infback.obj+inffast.obj+inflate.obj+inftrees.obj+trees.obj+uncompr.obj+zutil.obj
#OBJPA=
# targets
all: $(ZLIB_LIB) example.exe minigzip.exe
.c.obj:
$(CC) -c $(CFLAGS) $<
.asm.obj:
$(AS) -c $(ASFLAGS) $<
adler32.obj: adler32.c zlib.h zconf.h
compress.obj: compress.c zlib.h zconf.h
crc32.obj: crc32.c zlib.h zconf.h crc32.h
deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
gzclose.obj: gzclose.c zlib.h zconf.h gzguts.h
gzlib.obj: gzlib.c zlib.h zconf.h gzguts.h
gzread.obj: gzread.c zlib.h zconf.h gzguts.h
gzwrite.obj: gzwrite.c zlib.h zconf.h gzguts.h
infback.obj: infback.c zutil.h zlib.h zconf.h inftrees.h inflate.h \
inffast.h inffixed.h
inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h inflate.h \
inffast.h
inflate.obj: inflate.c zutil.h zlib.h zconf.h inftrees.h inflate.h \
inffast.h inffixed.h
inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
trees.obj: trees.c zutil.h zlib.h zconf.h deflate.h trees.h
uncompr.obj: uncompr.c zlib.h zconf.h
zutil.obj: zutil.c zutil.h zlib.h zconf.h
example.obj: test/example.c zlib.h zconf.h
minigzip.obj: test/minigzip.c zlib.h zconf.h
# For the sake of the old Borland make,
# the command line is cut to fit in the MS-DOS 128 byte limit:
$(ZLIB_LIB): $(OBJ1) $(OBJ2) $(OBJA)
-del $(ZLIB_LIB)
$(AR) $(ZLIB_LIB) $(OBJP1)
$(AR) $(ZLIB_LIB) $(OBJP2)
$(AR) $(ZLIB_LIB) $(OBJPA)
# testing
test: example.exe minigzip.exe
example
echo hello world | minigzip | minigzip -d
example.exe: example.obj $(ZLIB_LIB)
$(LD) $(LDFLAGS) example.obj $(ZLIB_LIB)
minigzip.exe: minigzip.obj $(ZLIB_LIB)
$(LD) $(LDFLAGS) minigzip.obj $(ZLIB_LIB)
# cleanup
clean:
-del $(ZLIB_LIB)
-del *.obj
-del *.exe
-del *.tds
-del zlib.bak
-del foo.gz

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# Makefile for zlib, derived from Makefile.dj2.
# Modified for mingw32 by C. Spieler, 6/16/98.
# Updated for zlib 1.2.x by Christian Spieler and Cosmin Truta, Mar-2003.
# Last updated: Mar 2012.
# Tested under Cygwin and MinGW.
# Copyright (C) 1995-2003 Jean-loup Gailly.
# For conditions of distribution and use, see copyright notice in zlib.h
# To compile, or to compile and test, type from the top level zlib directory:
#
# make -fwin32/Makefile.gcc; make test testdll -fwin32/Makefile.gcc
#
# To use the asm code, type:
# cp contrib/asm?86/match.S ./match.S
# make LOC=-DASMV OBJA=match.o -fwin32/Makefile.gcc
#
# To install libz.a, zconf.h and zlib.h in the system directories, type:
#
# make install -fwin32/Makefile.gcc
#
# BINARY_PATH, INCLUDE_PATH and LIBRARY_PATH must be set.
#
# To install the shared lib, append SHARED_MODE=1 to the make command :
#
# make install -fwin32/Makefile.gcc SHARED_MODE=1
# Note:
# If the platform is *not* MinGW (e.g. it is Cygwin or UWIN),
# the DLL name should be changed from "zlib1.dll".
STATICLIB = libz.a
SHAREDLIB = zlib1.dll
IMPLIB = libz.dll.a
#
# Set to 1 if shared object needs to be installed
#
SHARED_MODE=0
#LOC = -DASMV
#LOC = -DZLIB_DEBUG -g
PREFIX =
CC = $(PREFIX)gcc
CFLAGS = $(LOC) -O3 -Wall
AS = $(CC)
ASFLAGS = $(LOC) -Wall
LD = $(CC)
LDFLAGS = $(LOC)
AR = $(PREFIX)ar
ARFLAGS = rcs
RC = $(PREFIX)windres
RCFLAGS = --define GCC_WINDRES
STRIP = $(PREFIX)strip
CP = cp -fp
# If GNU install is available, replace $(CP) with install.
INSTALL = $(CP)
RM = rm -f
prefix ?= /usr/local
exec_prefix = $(prefix)
OBJS = adler32.o compress.o crc32.o deflate.o gzclose.o gzlib.o gzread.o \
gzwrite.o infback.o inffast.o inflate.o inftrees.o trees.o uncompr.o zutil.o
OBJA =
all: $(STATICLIB) $(SHAREDLIB) $(IMPLIB) example.exe minigzip.exe example_d.exe minigzip_d.exe
test: example.exe minigzip.exe
./example
echo hello world | ./minigzip | ./minigzip -d
testdll: example_d.exe minigzip_d.exe
./example_d
echo hello world | ./minigzip_d | ./minigzip_d -d
.c.o:
$(CC) $(CFLAGS) -c -o $@ $<
.S.o:
$(AS) $(ASFLAGS) -c -o $@ $<
$(STATICLIB): $(OBJS) $(OBJA)
$(AR) $(ARFLAGS) $@ $(OBJS) $(OBJA)
$(IMPLIB): $(SHAREDLIB)
$(SHAREDLIB): win32/zlib.def $(OBJS) $(OBJA) zlibrc.o
$(CC) -shared -Wl,--out-implib,$(IMPLIB) $(LDFLAGS) \
-o $@ win32/zlib.def $(OBJS) $(OBJA) zlibrc.o
$(STRIP) $@
example.exe: example.o $(STATICLIB)
$(LD) $(LDFLAGS) -o $@ example.o $(STATICLIB)
$(STRIP) $@
minigzip.exe: minigzip.o $(STATICLIB)
$(LD) $(LDFLAGS) -o $@ minigzip.o $(STATICLIB)
$(STRIP) $@
example_d.exe: example.o $(IMPLIB)
$(LD) $(LDFLAGS) -o $@ example.o $(IMPLIB)
$(STRIP) $@
minigzip_d.exe: minigzip.o $(IMPLIB)
$(LD) $(LDFLAGS) -o $@ minigzip.o $(IMPLIB)
$(STRIP) $@
example.o: test/example.c zlib.h zconf.h
$(CC) $(CFLAGS) -I. -c -o $@ test/example.c
minigzip.o: test/minigzip.c zlib.h zconf.h
$(CC) $(CFLAGS) -I. -c -o $@ test/minigzip.c
zlibrc.o: win32/zlib1.rc
$(RC) $(RCFLAGS) -o $@ win32/zlib1.rc
.PHONY: install uninstall clean
install: zlib.h zconf.h $(STATICLIB) $(IMPLIB)
@if test -z "$(DESTDIR)$(INCLUDE_PATH)" -o -z "$(DESTDIR)$(LIBRARY_PATH)" -o -z "$(DESTDIR)$(BINARY_PATH)"; then \
echo INCLUDE_PATH, LIBRARY_PATH, and BINARY_PATH must be specified; \
exit 1; \
fi
-@mkdir -p '$(DESTDIR)$(INCLUDE_PATH)'
-@mkdir -p '$(DESTDIR)$(LIBRARY_PATH)' '$(DESTDIR)$(LIBRARY_PATH)'/pkgconfig
-if [ "$(SHARED_MODE)" = "1" ]; then \
mkdir -p '$(DESTDIR)$(BINARY_PATH)'; \
$(INSTALL) $(SHAREDLIB) '$(DESTDIR)$(BINARY_PATH)'; \
$(INSTALL) $(IMPLIB) '$(DESTDIR)$(LIBRARY_PATH)'; \
fi
-$(INSTALL) zlib.h '$(DESTDIR)$(INCLUDE_PATH)'
-$(INSTALL) zconf.h '$(DESTDIR)$(INCLUDE_PATH)'
-$(INSTALL) $(STATICLIB) '$(DESTDIR)$(LIBRARY_PATH)'
sed \
-e 's|@prefix@|${prefix}|g' \
-e 's|@exec_prefix@|${exec_prefix}|g' \
-e 's|@libdir@|$(LIBRARY_PATH)|g' \
-e 's|@sharedlibdir@|$(LIBRARY_PATH)|g' \
-e 's|@includedir@|$(INCLUDE_PATH)|g' \
-e 's|@VERSION@|'`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' zlib.h`'|g' \
zlib.pc.in > '$(DESTDIR)$(LIBRARY_PATH)'/pkgconfig/zlib.pc
uninstall:
-if [ "$(SHARED_MODE)" = "1" ]; then \
$(RM) '$(DESTDIR)$(BINARY_PATH)'/$(SHAREDLIB); \
$(RM) '$(DESTDIR)$(LIBRARY_PATH)'/$(IMPLIB); \
fi
-$(RM) '$(DESTDIR)$(INCLUDE_PATH)'/zlib.h
-$(RM) '$(DESTDIR)$(INCLUDE_PATH)'/zconf.h
-$(RM) '$(DESTDIR)$(LIBRARY_PATH)'/$(STATICLIB)
clean:
-$(RM) $(STATICLIB)
-$(RM) $(SHAREDLIB)
-$(RM) $(IMPLIB)
-$(RM) *.o
-$(RM) *.exe
-$(RM) foo.gz
adler32.o: zlib.h zconf.h
compress.o: zlib.h zconf.h
crc32.o: crc32.h zlib.h zconf.h
deflate.o: deflate.h zutil.h zlib.h zconf.h
gzclose.o: zlib.h zconf.h gzguts.h
gzlib.o: zlib.h zconf.h gzguts.h
gzread.o: zlib.h zconf.h gzguts.h
gzwrite.o: zlib.h zconf.h gzguts.h
inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
infback.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
inftrees.o: zutil.h zlib.h zconf.h inftrees.h
trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
uncompr.o: zlib.h zconf.h
zutil.o: zutil.h zlib.h zconf.h

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# Makefile for zlib using Microsoft (Visual) C
# zlib is copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler
#
# Usage:
# nmake -f win32/Makefile.msc (standard build)
# nmake -f win32/Makefile.msc LOC=-DFOO (nonstandard build)
# nmake -f win32/Makefile.msc LOC="-DASMV -DASMINF" \
# OBJA="inffas32.obj match686.obj" (use ASM code, x86)
# nmake -f win32/Makefile.msc AS=ml64 LOC="-DASMV -DASMINF -I." \
# OBJA="inffasx64.obj gvmat64.obj inffas8664.obj" (use ASM code, x64)
# The toplevel directory of the source tree.
#
TOP = .
# optional build flags
LOC =
# variables
STATICLIB = zlib.lib
SHAREDLIB = zlib1.dll
IMPLIB = zdll.lib
CC = cl
AS = ml
LD = link
AR = lib
RC = rc
CFLAGS = -nologo -MD -W3 -O2 -Oy- -Zi -Fd"zlib" $(LOC)
WFLAGS = -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE
ASFLAGS = -coff -Zi $(LOC)
LDFLAGS = -nologo -debug -incremental:no -opt:ref
ARFLAGS = -nologo
RCFLAGS = /dWIN32 /r
OBJS = adler32.obj compress.obj crc32.obj deflate.obj gzclose.obj gzlib.obj gzread.obj \
gzwrite.obj infback.obj inflate.obj inftrees.obj inffast.obj trees.obj uncompr.obj zutil.obj
OBJA =
# targets
all: $(STATICLIB) $(SHAREDLIB) $(IMPLIB) \
example.exe minigzip.exe example_d.exe minigzip_d.exe
$(STATICLIB): $(OBJS) $(OBJA)
$(AR) $(ARFLAGS) -out:$@ $(OBJS) $(OBJA)
$(IMPLIB): $(SHAREDLIB)
$(SHAREDLIB): $(TOP)/win32/zlib.def $(OBJS) $(OBJA) zlib1.res
$(LD) $(LDFLAGS) -def:$(TOP)/win32/zlib.def -dll -implib:$(IMPLIB) \
-out:$@ -base:0x5A4C0000 $(OBJS) $(OBJA) zlib1.res
if exist $@.manifest \
mt -nologo -manifest $@.manifest -outputresource:$@;2
example.exe: example.obj $(STATICLIB)
$(LD) $(LDFLAGS) example.obj $(STATICLIB)
if exist $@.manifest \
mt -nologo -manifest $@.manifest -outputresource:$@;1
minigzip.exe: minigzip.obj $(STATICLIB)
$(LD) $(LDFLAGS) minigzip.obj $(STATICLIB)
if exist $@.manifest \
mt -nologo -manifest $@.manifest -outputresource:$@;1
example_d.exe: example.obj $(IMPLIB)
$(LD) $(LDFLAGS) -out:$@ example.obj $(IMPLIB)
if exist $@.manifest \
mt -nologo -manifest $@.manifest -outputresource:$@;1
minigzip_d.exe: minigzip.obj $(IMPLIB)
$(LD) $(LDFLAGS) -out:$@ minigzip.obj $(IMPLIB)
if exist $@.manifest \
mt -nologo -manifest $@.manifest -outputresource:$@;1
{$(TOP)}.c.obj:
$(CC) -c $(WFLAGS) $(CFLAGS) $<
{$(TOP)/test}.c.obj:
$(CC) -c -I$(TOP) $(WFLAGS) $(CFLAGS) $<
{$(TOP)/contrib/masmx64}.c.obj:
$(CC) -c $(WFLAGS) $(CFLAGS) $<
{$(TOP)/contrib/masmx64}.asm.obj:
$(AS) -c $(ASFLAGS) $<
{$(TOP)/contrib/masmx86}.asm.obj:
$(AS) -c $(ASFLAGS) $<
adler32.obj: $(TOP)/adler32.c $(TOP)/zlib.h $(TOP)/zconf.h
compress.obj: $(TOP)/compress.c $(TOP)/zlib.h $(TOP)/zconf.h
crc32.obj: $(TOP)/crc32.c $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/crc32.h
deflate.obj: $(TOP)/deflate.c $(TOP)/deflate.h $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h
gzclose.obj: $(TOP)/gzclose.c $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/gzguts.h
gzlib.obj: $(TOP)/gzlib.c $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/gzguts.h
gzread.obj: $(TOP)/gzread.c $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/gzguts.h
gzwrite.obj: $(TOP)/gzwrite.c $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/gzguts.h
infback.obj: $(TOP)/infback.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/inftrees.h $(TOP)/inflate.h \
$(TOP)/inffast.h $(TOP)/inffixed.h
inffast.obj: $(TOP)/inffast.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/inftrees.h $(TOP)/inflate.h \
$(TOP)/inffast.h
inflate.obj: $(TOP)/inflate.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/inftrees.h $(TOP)/inflate.h \
$(TOP)/inffast.h $(TOP)/inffixed.h
inftrees.obj: $(TOP)/inftrees.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/inftrees.h
trees.obj: $(TOP)/trees.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/deflate.h $(TOP)/trees.h
uncompr.obj: $(TOP)/uncompr.c $(TOP)/zlib.h $(TOP)/zconf.h
zutil.obj: $(TOP)/zutil.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h
gvmat64.obj: $(TOP)/contrib\masmx64\gvmat64.asm
inffasx64.obj: $(TOP)/contrib\masmx64\inffasx64.asm
inffas8664.obj: $(TOP)/contrib\masmx64\inffas8664.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h \
$(TOP)/inftrees.h $(TOP)/inflate.h $(TOP)/inffast.h
inffas32.obj: $(TOP)/contrib\masmx86\inffas32.asm
match686.obj: $(TOP)/contrib\masmx86\match686.asm
example.obj: $(TOP)/test/example.c $(TOP)/zlib.h $(TOP)/zconf.h
minigzip.obj: $(TOP)/test/minigzip.c $(TOP)/zlib.h $(TOP)/zconf.h
zlib1.res: $(TOP)/win32/zlib1.rc
$(RC) $(RCFLAGS) /fo$@ $(TOP)/win32/zlib1.rc
# testing
test: example.exe minigzip.exe
example
echo hello world | minigzip | minigzip -d
testdll: example_d.exe minigzip_d.exe
example_d
echo hello world | minigzip_d | minigzip_d -d
# cleanup
clean:
-del $(STATICLIB)
-del $(SHAREDLIB)
-del $(IMPLIB)
-del *.obj
-del *.res
-del *.exp
-del *.exe
-del *.pdb
-del *.manifest
-del foo.gz

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ZLIB DATA COMPRESSION LIBRARY
zlib 1.2.11 is a general purpose data compression library. All the code is
thread safe. The data format used by the zlib library is described by RFCs
(Request for Comments) 1950 to 1952 in the files
http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
and rfc1952.txt (gzip format).
All functions of the compression library are documented in the file zlib.h
(volunteer to write man pages welcome, contact zlib@gzip.org). Two compiled
examples are distributed in this package, example and minigzip. The example_d
and minigzip_d flavors validate that the zlib1.dll file is working correctly.
Questions about zlib should be sent to <zlib@gzip.org>. The zlib home page
is http://zlib.net/ . Before reporting a problem, please check this site to
verify that you have the latest version of zlib; otherwise get the latest
version and check whether the problem still exists or not.
PLEASE read DLL_FAQ.txt, and the the zlib FAQ http://zlib.net/zlib_faq.html
before asking for help.
Manifest:
The package zlib-1.2.11-win32-x86.zip will contain the following files:
README-WIN32.txt This document
ChangeLog Changes since previous zlib packages
DLL_FAQ.txt Frequently asked questions about zlib1.dll
zlib.3.pdf Documentation of this library in Adobe Acrobat format
example.exe A statically-bound example (using zlib.lib, not the dll)
example.pdb Symbolic information for debugging example.exe
example_d.exe A zlib1.dll bound example (using zdll.lib)
example_d.pdb Symbolic information for debugging example_d.exe
minigzip.exe A statically-bound test program (using zlib.lib, not the dll)
minigzip.pdb Symbolic information for debugging minigzip.exe
minigzip_d.exe A zlib1.dll bound test program (using zdll.lib)
minigzip_d.pdb Symbolic information for debugging minigzip_d.exe
zlib.h Install these files into the compilers' INCLUDE path to
zconf.h compile programs which use zlib.lib or zdll.lib
zdll.lib Install these files into the compilers' LIB path if linking
zdll.exp a compiled program to the zlib1.dll binary
zlib.lib Install these files into the compilers' LIB path to link zlib
zlib.pdb into compiled programs, without zlib1.dll runtime dependency
(zlib.pdb provides debugging info to the compile time linker)
zlib1.dll Install this binary shared library into the system PATH, or
the program's runtime directory (where the .exe resides)
zlib1.pdb Install in the same directory as zlib1.dll, in order to debug
an application crash using WinDbg or similar tools.
All .pdb files above are entirely optional, but are very useful to a developer
attempting to diagnose program misbehavior or a crash. Many additional
important files for developers can be found in the zlib127.zip source package
available from http://zlib.net/ - review that package's README file for details.
Acknowledgments:
The deflate format used by zlib was defined by Phil Katz. The deflate and
zlib specifications were written by L. Peter Deutsch. Thanks to all the
people who reported problems and suggested various improvements in zlib; they
are too numerous to cite here.
Copyright notice:
(C) 1995-2017 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
Jean-loup Gailly Mark Adler
jloup@gzip.org madler@alumni.caltech.edu
If you use the zlib library in a product, we would appreciate *not* receiving
lengthy legal documents to sign. The sources are provided for free but without
warranty of any kind. The library has been entirely written by Jean-loup
Gailly and Mark Adler; it does not include third-party code.
If you redistribute modified sources, we would appreciate that you include in
the file ChangeLog history information documenting your changes. Please read
the FAQ for more information on the distribution of modified source versions.

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To build zlib using the Microsoft Visual C++ environment,
use the appropriate project from the contrib/vstudio/ directory.

94
dependencies/zlib-1.2.11/win32/zlib.def vendored Normal file
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; zlib data compression library
EXPORTS
; basic functions
zlibVersion
deflate
deflateEnd
inflate
inflateEnd
; advanced functions
deflateSetDictionary
deflateGetDictionary
deflateCopy
deflateReset
deflateParams
deflateTune
deflateBound
deflatePending
deflatePrime
deflateSetHeader
inflateSetDictionary
inflateGetDictionary
inflateSync
inflateCopy
inflateReset
inflateReset2
inflatePrime
inflateMark
inflateGetHeader
inflateBack
inflateBackEnd
zlibCompileFlags
; utility functions
compress
compress2
compressBound
uncompress
uncompress2
gzopen
gzdopen
gzbuffer
gzsetparams
gzread
gzfread
gzwrite
gzfwrite
gzprintf
gzvprintf
gzputs
gzgets
gzputc
gzgetc
gzungetc
gzflush
gzseek
gzrewind
gztell
gzoffset
gzeof
gzdirect
gzclose
gzclose_r
gzclose_w
gzerror
gzclearerr
; large file functions
gzopen64
gzseek64
gztell64
gzoffset64
adler32_combine64
crc32_combine64
; checksum functions
adler32
adler32_z
crc32
crc32_z
adler32_combine
crc32_combine
; various hacks, don't look :)
deflateInit_
deflateInit2_
inflateInit_
inflateInit2_
inflateBackInit_
gzgetc_
zError
inflateSyncPoint
get_crc_table
inflateUndermine
inflateValidate
inflateCodesUsed
inflateResetKeep
deflateResetKeep
gzopen_w

40
dependencies/zlib-1.2.11/win32/zlib1.rc vendored Normal file
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#include <winver.h>
#include "../zlib.h"
#ifdef GCC_WINDRES
VS_VERSION_INFO VERSIONINFO
#else
VS_VERSION_INFO VERSIONINFO MOVEABLE IMPURE LOADONCALL DISCARDABLE
#endif
FILEVERSION ZLIB_VER_MAJOR,ZLIB_VER_MINOR,ZLIB_VER_REVISION,0
PRODUCTVERSION ZLIB_VER_MAJOR,ZLIB_VER_MINOR,ZLIB_VER_REVISION,0
FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
#ifdef _DEBUG
FILEFLAGS 1
#else
FILEFLAGS 0
#endif
FILEOS VOS__WINDOWS32
FILETYPE VFT_DLL
FILESUBTYPE 0 // not used
BEGIN
BLOCK "StringFileInfo"
BEGIN
BLOCK "040904E4"
//language ID = U.S. English, char set = Windows, Multilingual
BEGIN
VALUE "FileDescription", "zlib data compression library\0"
VALUE "FileVersion", ZLIB_VERSION "\0"
VALUE "InternalName", "zlib1.dll\0"
VALUE "LegalCopyright", "(C) 1995-2017 Jean-loup Gailly & Mark Adler\0"
VALUE "OriginalFilename", "zlib1.dll\0"
VALUE "ProductName", "zlib\0"
VALUE "ProductVersion", ZLIB_VERSION "\0"
VALUE "Comments", "For more information visit http://www.zlib.net/\0"
END
END
BLOCK "VarFileInfo"
BEGIN
VALUE "Translation", 0x0409, 1252
END
END