[zlib][build] Add basic CMake buildsystem
Currently Chromium zlib builds using GN and requires build scripts coming
from Chromium source tree (a huge source code checkout).
The idea is to allow to build standalone so no need for a full
checkout plus permit to actually replace the default system zlib in a Linux
system by Chromium zlib.
To checkout and build:
a) git clone https://chromium.googlesource.com/chromium/src/third_party/zlib/ chromium-zlib
b) cd chromium-zlib && mkdir build && cd build
c) cmake -DENABLE_SIMD_OPTIMIZATIONS=1 -DCMAKE_BUILD_TYPE=RELEASE ..
d) make -j
e) sudo make install
A regular app linked with the system zlib will immediately benefit if chromium
zlib is installed with no need to relink as long it is a match for zlib version
(latest release is 1.2.13).
On Ubuntu 22.04 using system zlib 1.2.13, and zlib_bench built with:
g++ -std=c++14 -O3 ../contrib/bench/zlib_bench.cc $(pkg-config --cflags --libs zlib)
a) System zlib:
adenilson@hp:~/chromium/src/third_party/zlib/out$ ldd ./a.out | grep libz
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f24845db000)
adenilson@hp:~/chromium/src/third_party/zlib/out$ ./a.out gzip ~/corpus/flex/*
/home/adenilson/corpus/flex/baddata1.snappy :
GZIP: [b 1M] bytes 27512 -> 22920 83.31% comp 52.7 ( 52.8) MB/s uncomp 207.4 (207.9) MB/s
/home/adenilson/corpus/flex/geo.protodata :
GZIP: [b 1M] bytes 118588 -> 15143 12.77% comp 118.8 (120.1) MB/s uncomp 635.2 (640.6) MB/s
/home/adenilson/corpus/flex/html_x_4 :
GZIP: [b 1M] bytes 409600 -> 53299 13.01% comp 82.7 ( 83.0) MB/s uncomp 568.4 (569.5) MB/s
Now after installing Chromium zlib (no need for rebuild or relink):
b) Chromium zlib:
adenilson@hp:~/chromium/src/third_party/zlib/out$ ldd ./a.out | grep libz
libz.so.1 => /usr/local/lib/libz.so.1 (0x00007f585ef13000)
adenilson@hp:~/chromium/src/third_party/zlib/out$ ./a.out gzip ~/corpus/flex/*
/home/adenilson/corpus/flex/baddata1.snappy :
GZIP: [b 1M] bytes 27512 -> 22920 83.31% comp 61.8 ( 61.9) MB/s uncomp 428.0 (430.3) MB/s
/home/adenilson/corpus/flex/geo.protodata :
GZIP: [b 1M] bytes 118588 -> 15124 12.75% comp 150.8 (151.4) MB/s uncomp 2121.2 (2135.2) MB/s
/home/adenilson/corpus/flex/html_x_4 :
GZIP: [b 1M] bytes 409600 -> 53285 13.01% comp 102.5 (103.2) MB/s uncomp 1331.6 (1347.5) MB/s
Bug: 1381000
Change-Id: I6a7346076252802a3c866c56e561ebcf5905ccc9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4192965
Reviewed-by: Hans Wennborg <hans@chromium.org>
Reviewed-by: Chris Blume <cblume@chromium.org>
Commit-Queue: Adenilson Cavalcanti <cavalcantii@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1097405}
NOKEYCHECK=True
GitOrigin-RevId: 4b596aee1626fe595a13c50366ff59b0aad84f61
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..7241fb3
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,229 @@
+cmake_minimum_required(VERSION 3.0)
+set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)
+
+project(zlib C)
+
+set(VERSION "1.2.13")
+
+set(INSTALL_BIN_DIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE PATH "Installation directory for executables")
+set(INSTALL_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib" CACHE PATH "Installation directory for libraries")
+set(INSTALL_INC_DIR "${CMAKE_INSTALL_PREFIX}/include" CACHE PATH "Installation directory for headers")
+set(INSTALL_MAN_DIR "${CMAKE_INSTALL_PREFIX}/share/man" CACHE PATH "Installation directory for manual pages")
+set(INSTALL_PKGCONFIG_DIR "${CMAKE_INSTALL_PREFIX}/share/pkgconfig" CACHE PATH "Installation directory for pkgconfig (.pc) files")
+
+include(CheckTypeSize)
+include(CheckFunctionExists)
+include(CheckIncludeFile)
+include(CheckCSourceCompiles)
+enable_testing()
+
+check_include_file(sys/types.h HAVE_SYS_TYPES_H)
+check_include_file(stdint.h HAVE_STDINT_H)
+check_include_file(stddef.h HAVE_STDDEF_H)
+
+option(ENABLE_SIMD_OPTIMIZATIONS "Enable all SIMD optimizations" OFF)
+
+# TODO(cavalcantii): add support for other OSes (e.g. Android, fuchsia, osx)
+# and architectures (e.g. Arm).
+if (ENABLE_SIMD_OPTIMIZATIONS)
+ add_definitions(-DINFLATE_CHUNK_SIMD_SSE2)
+ add_definitions(-DADLER32_SIMD_SSSE3)
+ add_definitions(-DINFLATE_CHUNK_READ_64LE)
+ add_definitions(-DCRC32_SIMD_SSE42_PCLMUL)
+ add_definitions(-DDEFLATE_SLIDE_HASH_SSE2)
+ add_compile_options(-msse4.2 -mpclmul)
+ # Required by CPU features detection code.
+ add_definitions(-DX86_NOT_WINDOWS)
+endif()
+
+#
+# Check to see if we have large file support
+#
+set(CMAKE_REQUIRED_DEFINITIONS -D_LARGEFILE64_SOURCE=1)
+# We add these other definitions here because CheckTypeSize.cmake
+# in CMake 2.4.x does not automatically do so and we want
+# compatibility with CMake 2.4.x.
+if(HAVE_SYS_TYPES_H)
+ list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_SYS_TYPES_H)
+endif()
+if(HAVE_STDINT_H)
+ list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDINT_H)
+endif()
+if(HAVE_STDDEF_H)
+ list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDDEF_H)
+endif()
+check_type_size(off64_t OFF64_T)
+if(HAVE_OFF64_T)
+ add_definitions(-D_LARGEFILE64_SOURCE=1)
+endif()
+set(CMAKE_REQUIRED_DEFINITIONS) # clear variable
+
+#
+# Check for fseeko
+#
+check_function_exists(fseeko HAVE_FSEEKO)
+if(NOT HAVE_FSEEKO)
+ add_definitions(-DNO_FSEEKO)
+endif()
+
+#
+# Check for unistd.h
+#
+check_include_file(unistd.h Z_HAVE_UNISTD_H)
+
+if(MSVC)
+ set(CMAKE_DEBUG_POSTFIX "d")
+ add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
+ add_definitions(-D_CRT_NONSTDC_NO_DEPRECATE)
+ include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+endif()
+
+if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR)
+ # If we're doing an out of source build and the user has a zconf.h
+ # in their source tree...
+ if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h)
+ message(STATUS "Renaming")
+ message(STATUS " ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h")
+ message(STATUS "to 'zconf.h.included' because this file is included with zlib")
+ message(STATUS "but CMake generates it automatically in the build directory.")
+ file(RENAME ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h.included)
+ endif()
+endif()
+
+set(ZLIB_PC ${CMAKE_CURRENT_BINARY_DIR}/zlib.pc)
+configure_file( ${CMAKE_CURRENT_SOURCE_DIR}/zlib.pc.cmakein
+ ${ZLIB_PC} @ONLY)
+configure_file( ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h.cmakein
+ ${CMAKE_CURRENT_BINARY_DIR}/zconf.h @ONLY)
+include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_SOURCE_DIR})
+
+
+#============================================================================
+# zlib
+#============================================================================
+
+set(ZLIB_PUBLIC_HDRS
+ ${CMAKE_CURRENT_BINARY_DIR}/zconf.h
+ zlib.h
+)
+set(ZLIB_PRIVATE_HDRS
+ crc32.h
+ deflate.h
+ gzguts.h
+ inffast.h
+ inffixed.h
+ inflate.h
+ inftrees.h
+ trees.h
+ zutil.h
+)
+set(ZLIB_SRCS
+ adler32.c
+ compress.c
+ crc32.c
+ deflate.c
+ gzclose.c
+ gzlib.c
+ gzread.c
+ gzwrite.c
+ inflate.c
+ infback.c
+ inftrees.c
+ inffast.c
+ trees.c
+ uncompr.c
+ zutil.c
+)
+
+
+#============================================================================
+# Update list of source files if optimizations were enabled
+#============================================================================
+if (ENABLE_SIMD_OPTIMIZATIONS)
+ list(REMOVE_ITEM ZLIB_SRCS inflate.c)
+
+ list(APPEND ZLIB_PRIVATE_HDRS ${CMAKE_CURRENT_SOURCE_DIR}/adler32_simd.h)
+ list(APPEND ZLIB_PRIVATE_HDRS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/optimizations/chunkcopy.h)
+ list(APPEND ZLIB_PRIVATE_HDRS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/optimizations/inffast_chunk.h)
+ list(APPEND ZLIB_PRIVATE_HDRS ${CMAKE_CURRENT_SOURCE_DIR}/cpu_features.h)
+ list(APPEND ZLIB_PRIVATE_HDRS ${CMAKE_CURRENT_SOURCE_DIR}/crc32_simd.h)
+
+ list(APPEND ZLIB_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/adler32_simd.c)
+ list(APPEND ZLIB_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/optimizations/inffast_chunk.c)
+ list(APPEND ZLIB_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/optimizations/inflate.c)
+ list(APPEND ZLIB_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/cpu_features.c)
+ list(APPEND ZLIB_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/crc32_simd.c)
+ list(APPEND ZLIB_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/crc_folding.c)
+endif()
+
+# parse the full version number from zlib.h and include in ZLIB_FULL_VERSION
+file(READ ${CMAKE_CURRENT_SOURCE_DIR}/zlib.h _zlib_h_contents)
+string(REGEX REPLACE ".*#define[ \t]+ZLIB_VERSION[ \t]+\"([-0-9A-Za-z.]+)\".*"
+ "\\1" ZLIB_FULL_VERSION ${_zlib_h_contents})
+
+if(MINGW)
+ # This gets us DLL resource information when compiling on MinGW.
+ if(NOT CMAKE_RC_COMPILER)
+ set(CMAKE_RC_COMPILER windres.exe)
+ endif()
+
+ add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
+ COMMAND ${CMAKE_RC_COMPILER}
+ -D GCC_WINDRES
+ -I ${CMAKE_CURRENT_SOURCE_DIR}
+ -I ${CMAKE_CURRENT_BINARY_DIR}
+ -o ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
+ -i ${CMAKE_CURRENT_SOURCE_DIR}/win32/zlib1.rc)
+ set(ZLIB_DLL_SRCS ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
+endif(MINGW)
+
+add_library(zlib SHARED ${ZLIB_SRCS} ${ZLIB_DLL_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
+add_library(zlibstatic STATIC ${ZLIB_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
+set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
+set_target_properties(zlib PROPERTIES SOVERSION 1)
+
+if(NOT CYGWIN)
+ # This property causes shared libraries on Linux to have the full version
+ # encoded into their final filename. We disable this on Cygwin because
+ # it causes cygz-${ZLIB_FULL_VERSION}.dll to be created when cygz.dll
+ # seems to be the default.
+ #
+ # This has no effect with MSVC, on that platform the version info for
+ # the DLL comes from the resource file win32/zlib1.rc
+ set_target_properties(zlib PROPERTIES VERSION ${ZLIB_FULL_VERSION})
+endif()
+
+if(UNIX)
+ # On unix-like platforms the library is almost always called libz
+ set_target_properties(zlib zlibstatic PROPERTIES OUTPUT_NAME z)
+ if(NOT APPLE)
+ set_target_properties(zlib PROPERTIES LINK_FLAGS "-Wl,--version-script,\"${CMAKE_CURRENT_SOURCE_DIR}/zlib.map\"")
+ endif()
+elseif(BUILD_SHARED_LIBS AND WIN32)
+ # Creates zlib1.dll when building shared library version
+ set_target_properties(zlib PROPERTIES SUFFIX "1.dll")
+endif()
+
+if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
+ install(TARGETS zlib zlibstatic
+ RUNTIME DESTINATION "${INSTALL_BIN_DIR}"
+ ARCHIVE DESTINATION "${INSTALL_LIB_DIR}"
+ LIBRARY DESTINATION "${INSTALL_LIB_DIR}" )
+endif()
+if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL )
+ install(FILES ${ZLIB_PUBLIC_HDRS} DESTINATION "${INSTALL_INC_DIR}")
+endif()
+if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
+ install(FILES zlib.3 DESTINATION "${INSTALL_MAN_DIR}/man3")
+endif()
+if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
+ install(FILES ${ZLIB_PC} DESTINATION "${INSTALL_PKGCONFIG_DIR}")
+endif()
+
+#============================================================================
+# Benchmarker
+#============================================================================
+enable_language(CXX)
+set(CMAKE_CXX_STANDARD 14) # workaround for older compilers (e.g. g++ 5.4).
+add_executable(zlib_bench contrib/bench/zlib_bench.cc)
+target_link_libraries(zlib_bench zlib)
diff --git a/patches/0010-cmake-enable-simd.patch b/patches/0010-cmake-enable-simd.patch
new file mode 100644
index 0000000..77f7f88
--- /dev/null
+++ b/patches/0010-cmake-enable-simd.patch
@@ -0,0 +1,91 @@
+diff --git a/third_party/zlib/CMakeLists.txt b/third_party/zlib/CMakeLists.txt
+index b412dc7feb732..7241fb3e301ac 100644
+--- a/third_party/zlib/CMakeLists.txt
++++ b/third_party/zlib/CMakeLists.txt
+@@ -1,4 +1,4 @@
+-cmake_minimum_required(VERSION 2.4.4)
++cmake_minimum_required(VERSION 3.0)
+ set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)
+
+ project(zlib C)
+@@ -21,6 +21,21 @@ check_include_file(sys/types.h HAVE_SYS_TYPES_H)
+ check_include_file(stdint.h HAVE_STDINT_H)
+ check_include_file(stddef.h HAVE_STDDEF_H)
+
++option(ENABLE_SIMD_OPTIMIZATIONS "Enable all SIMD optimizations" OFF)
++
++# TODO(cavalcantii): add support for other OSes (e.g. Android, fuchsia, osx)
++# and architectures (e.g. Arm).
++if (ENABLE_SIMD_OPTIMIZATIONS)
++ add_definitions(-DINFLATE_CHUNK_SIMD_SSE2)
++ add_definitions(-DADLER32_SIMD_SSSE3)
++ add_definitions(-DINFLATE_CHUNK_READ_64LE)
++ add_definitions(-DCRC32_SIMD_SSE42_PCLMUL)
++ add_definitions(-DDEFLATE_SLIDE_HASH_SSE2)
++ add_compile_options(-msse4.2 -mpclmul)
++ # Required by CPU features detection code.
++ add_definitions(-DX86_NOT_WINDOWS)
++endif()
++
+ #
+ # Check to see if we have large file support
+ #
+@@ -120,10 +135,25 @@ set(ZLIB_SRCS
+ zutil.c
+ )
+
+-if(NOT MINGW)
+- set(ZLIB_DLL_SRCS
+- win32/zlib1.rc # If present will override custom build rule below.
+- )
++
++#============================================================================
++# Update list of source files if optimizations were enabled
++#============================================================================
++if (ENABLE_SIMD_OPTIMIZATIONS)
++ list(REMOVE_ITEM ZLIB_SRCS inflate.c)
++
++ list(APPEND ZLIB_PRIVATE_HDRS ${CMAKE_CURRENT_SOURCE_DIR}/adler32_simd.h)
++ list(APPEND ZLIB_PRIVATE_HDRS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/optimizations/chunkcopy.h)
++ list(APPEND ZLIB_PRIVATE_HDRS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/optimizations/inffast_chunk.h)
++ list(APPEND ZLIB_PRIVATE_HDRS ${CMAKE_CURRENT_SOURCE_DIR}/cpu_features.h)
++ list(APPEND ZLIB_PRIVATE_HDRS ${CMAKE_CURRENT_SOURCE_DIR}/crc32_simd.h)
++
++ list(APPEND ZLIB_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/adler32_simd.c)
++ list(APPEND ZLIB_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/optimizations/inffast_chunk.c)
++ list(APPEND ZLIB_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/optimizations/inflate.c)
++ list(APPEND ZLIB_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/cpu_features.c)
++ list(APPEND ZLIB_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/crc32_simd.c)
++ list(APPEND ZLIB_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/crc_folding.c)
+ endif()
+
+ # parse the full version number from zlib.h and include in ZLIB_FULL_VERSION
+@@ -191,23 +221,9 @@ if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
+ endif()
+
+ #============================================================================
+-# Example binaries
++# Benchmarker
+ #============================================================================
+-
+-add_executable(example test/example.c)
+-target_link_libraries(example zlib)
+-add_test(example example)
+-
+-add_executable(minigzip test/minigzip.c)
+-target_link_libraries(minigzip zlib)
+-
+-if(HAVE_OFF64_T)
+- add_executable(example64 test/example.c)
+- target_link_libraries(example64 zlib)
+- set_target_properties(example64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
+- add_test(example64 example64)
+-
+- add_executable(minigzip64 test/minigzip.c)
+- target_link_libraries(minigzip64 zlib)
+- set_target_properties(minigzip64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
+-endif()
++enable_language(CXX)
++set(CMAKE_CXX_STANDARD 14) # workaround for older compilers (e.g. g++ 5.4).
++add_executable(zlib_bench contrib/bench/zlib_bench.cc)
++target_link_libraries(zlib_bench zlib)
diff --git a/zconf.h.cmakein b/zconf.h.cmakein
new file mode 100644
index 0000000..247ba24
--- /dev/null
+++ b/zconf.h.cmakein
@@ -0,0 +1,549 @@
+/* zconf.h -- configuration of the zlib compression library
+ * Copyright (C) 1995-2016 Jean-loup Gailly, Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id$ */
+
+#ifndef ZCONF_H
+#define ZCONF_H
+#cmakedefine Z_PREFIX
+#cmakedefine Z_HAVE_UNISTD_H
+
+/*
+ * If you *really* need a unique prefix for all types and library functions,
+ * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
+ * Even better than compiling with -DZ_PREFIX would be to use configure to set
+ * this permanently in zconf.h using "./configure --zprefix".
+ */
+#ifdef Z_PREFIX /* may be set to #if 1 by ./configure */
+# define Z_PREFIX_SET
+
+/* all linked symbols and init macros */
+# define _dist_code z__dist_code
+# define _length_code z__length_code
+# define _tr_align z__tr_align
+# define _tr_flush_bits z__tr_flush_bits
+# define _tr_flush_block z__tr_flush_block
+# define _tr_init z__tr_init
+# define _tr_stored_block z__tr_stored_block
+# define _tr_tally z__tr_tally
+# define adler32 z_adler32
+# define adler32_combine z_adler32_combine
+# define adler32_combine64 z_adler32_combine64
+# define adler32_z z_adler32_z
+# ifndef Z_SOLO
+# define compress z_compress
+# define compress2 z_compress2
+# define compressBound z_compressBound
+# endif
+# define crc32 z_crc32
+# define crc32_combine z_crc32_combine
+# define crc32_combine64 z_crc32_combine64
+# define crc32_combine_gen z_crc32_combine_gen
+# define crc32_combine_gen64 z_crc32_combine_gen64
+# define crc32_combine_op z_crc32_combine_op
+# define crc32_z z_crc32_z
+# define deflate z_deflate
+# define deflateBound z_deflateBound
+# define deflateCopy z_deflateCopy
+# define deflateEnd z_deflateEnd
+# define deflateGetDictionary z_deflateGetDictionary
+# define deflateInit z_deflateInit
+# define deflateInit2 z_deflateInit2
+# define deflateInit2_ z_deflateInit2_
+# define deflateInit_ z_deflateInit_
+# define deflateParams z_deflateParams
+# define deflatePending z_deflatePending
+# define deflatePrime z_deflatePrime
+# define deflateReset z_deflateReset
+# define deflateResetKeep z_deflateResetKeep
+# define deflateSetDictionary z_deflateSetDictionary
+# define deflateSetHeader z_deflateSetHeader
+# define deflateTune z_deflateTune
+# define deflate_copyright z_deflate_copyright
+# define get_crc_table z_get_crc_table
+# ifndef Z_SOLO
+# define gz_error z_gz_error
+# define gz_intmax z_gz_intmax
+# define gz_strwinerror z_gz_strwinerror
+# define gzbuffer z_gzbuffer
+# define gzclearerr z_gzclearerr
+# define gzclose z_gzclose
+# define gzclose_r z_gzclose_r
+# define gzclose_w z_gzclose_w
+# define gzdirect z_gzdirect
+# define gzdopen z_gzdopen
+# define gzeof z_gzeof
+# define gzerror z_gzerror
+# define gzflush z_gzflush
+# define gzfread z_gzfread
+# define gzfwrite z_gzfwrite
+# define gzgetc z_gzgetc
+# define gzgetc_ z_gzgetc_
+# define gzgets z_gzgets
+# define gzoffset z_gzoffset
+# define gzoffset64 z_gzoffset64
+# define gzopen z_gzopen
+# define gzopen64 z_gzopen64
+# ifdef _WIN32
+# define gzopen_w z_gzopen_w
+# endif
+# define gzprintf z_gzprintf
+# define gzputc z_gzputc
+# define gzputs z_gzputs
+# define gzread z_gzread
+# define gzrewind z_gzrewind
+# define gzseek z_gzseek
+# define gzseek64 z_gzseek64
+# define gzsetparams z_gzsetparams
+# define gztell z_gztell
+# define gztell64 z_gztell64
+# define gzungetc z_gzungetc
+# define gzvprintf z_gzvprintf
+# define gzwrite z_gzwrite
+# endif
+# define inflate z_inflate
+# define inflateBack z_inflateBack
+# define inflateBackEnd z_inflateBackEnd
+# define inflateBackInit z_inflateBackInit
+# define inflateBackInit_ z_inflateBackInit_
+# define inflateCodesUsed z_inflateCodesUsed
+# define inflateCopy z_inflateCopy
+# define inflateEnd z_inflateEnd
+# define inflateGetDictionary z_inflateGetDictionary
+# define inflateGetHeader z_inflateGetHeader
+# define inflateInit z_inflateInit
+# define inflateInit2 z_inflateInit2
+# define inflateInit2_ z_inflateInit2_
+# define inflateInit_ z_inflateInit_
+# define inflateMark z_inflateMark
+# define inflatePrime z_inflatePrime
+# define inflateReset z_inflateReset
+# define inflateReset2 z_inflateReset2
+# define inflateResetKeep z_inflateResetKeep
+# define inflateSetDictionary z_inflateSetDictionary
+# define inflateSync z_inflateSync
+# define inflateSyncPoint z_inflateSyncPoint
+# define inflateUndermine z_inflateUndermine
+# define inflateValidate z_inflateValidate
+# define inflate_copyright z_inflate_copyright
+# define inflate_fast z_inflate_fast
+# define inflate_table z_inflate_table
+# ifndef Z_SOLO
+# define uncompress z_uncompress
+# define uncompress2 z_uncompress2
+# endif
+# define zError z_zError
+# ifndef Z_SOLO
+# define zcalloc z_zcalloc
+# define zcfree z_zcfree
+# endif
+# define zlibCompileFlags z_zlibCompileFlags
+# define zlibVersion z_zlibVersion
+
+/* all zlib typedefs in zlib.h and zconf.h */
+# define Byte z_Byte
+# define Bytef z_Bytef
+# define alloc_func z_alloc_func
+# define charf z_charf
+# define free_func z_free_func
+# ifndef Z_SOLO
+# define gzFile z_gzFile
+# endif
+# define gz_header z_gz_header
+# define gz_headerp z_gz_headerp
+# define in_func z_in_func
+# define intf z_intf
+# define out_func z_out_func
+# define uInt z_uInt
+# define uIntf z_uIntf
+# define uLong z_uLong
+# define uLongf z_uLongf
+# define voidp z_voidp
+# define voidpc z_voidpc
+# define voidpf z_voidpf
+
+/* all zlib structs in zlib.h and zconf.h */
+# define gz_header_s z_gz_header_s
+# define internal_state z_internal_state
+
+#endif
+
+#if defined(__MSDOS__) && !defined(MSDOS)
+# define MSDOS
+#endif
+#if (defined(OS_2) || defined(__OS2__)) && !defined(OS2)
+# define OS2
+#endif
+#if defined(_WINDOWS) && !defined(WINDOWS)
+# define WINDOWS
+#endif
+#if defined(_WIN32) || defined(_WIN32_WCE) || defined(__WIN32__)
+# ifndef WIN32
+# define WIN32
+# endif
+#endif
+#if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32)
+# if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__)
+# ifndef SYS16BIT
+# define SYS16BIT
+# endif
+# endif
+#endif
+
+/*
+ * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
+ * than 64k bytes at a time (needed on systems with 16-bit int).
+ */
+#ifdef SYS16BIT
+# define MAXSEG_64K
+#endif
+#ifdef MSDOS
+# define UNALIGNED_OK
+#endif
+
+#ifdef __STDC_VERSION__
+# ifndef STDC
+# define STDC
+# endif
+# if __STDC_VERSION__ >= 199901L
+# ifndef STDC99
+# define STDC99
+# endif
+# endif
+#endif
+#if !defined(STDC) && (defined(__STDC__) || defined(__cplusplus))
+# define STDC
+#endif
+#if !defined(STDC) && (defined(__GNUC__) || defined(__BORLANDC__))
+# define STDC
+#endif
+#if !defined(STDC) && (defined(MSDOS) || defined(WINDOWS) || defined(WIN32))
+# define STDC
+#endif
+#if !defined(STDC) && (defined(OS2) || defined(__HOS_AIX__))
+# define STDC
+#endif
+
+#if defined(__OS400__) && !defined(STDC) /* iSeries (formerly AS/400). */
+# define STDC
+#endif
+
+#ifndef STDC
+# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
+# define const /* note: need a more gentle solution here */
+# endif
+#endif
+
+#if defined(ZLIB_CONST) && !defined(z_const)
+# define z_const const
+#else
+# define z_const
+#endif
+
+#ifdef Z_SOLO
+ typedef unsigned long z_size_t;
+#else
+# define z_longlong long long
+# if defined(NO_SIZE_T)
+ typedef unsigned NO_SIZE_T z_size_t;
+# elif defined(STDC)
+# include <stddef.h>
+ typedef size_t z_size_t;
+# else
+ typedef unsigned long z_size_t;
+# endif
+# undef z_longlong
+#endif
+
+/* Maximum value for memLevel in deflateInit2 */
+#ifndef MAX_MEM_LEVEL
+# ifdef MAXSEG_64K
+# define MAX_MEM_LEVEL 8
+# else
+# define MAX_MEM_LEVEL 9
+# endif
+#endif
+
+/* Maximum value for windowBits in deflateInit2 and inflateInit2.
+ * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
+ * created by gzip. (Files created by minigzip can still be extracted by
+ * gzip.)
+ */
+#ifndef MAX_WBITS
+# define MAX_WBITS 15 /* 32K LZ77 window */
+#endif
+
+/* The memory requirements for deflate are (in bytes):
+ (1 << (windowBits+2)) + (1 << (memLevel+9))
+ that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
+ plus a few kilobytes for small objects. For example, if you want to reduce
+ the default memory requirements from 256K to 128K, compile with
+ make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
+ Of course this will generally degrade compression (there's no free lunch).
+
+ The memory requirements for inflate are (in bytes) 1 << windowBits
+ that is, 32K for windowBits=15 (default value) plus about 7 kilobytes
+ for small objects.
+*/
+
+ /* Type declarations */
+
+#ifndef OF /* function prototypes */
+# ifdef STDC
+# define OF(args) args
+# else
+# define OF(args) ()
+# endif
+#endif
+
+#ifndef Z_ARG /* function prototypes for stdarg */
+# if defined(STDC) || defined(Z_HAVE_STDARG_H)
+# define Z_ARG(args) args
+# else
+# define Z_ARG(args) ()
+# endif
+#endif
+
+/* The following definitions for FAR are needed only for MSDOS mixed
+ * model programming (small or medium model with some far allocations).
+ * This was tested only with MSC; for other MSDOS compilers you may have
+ * to define NO_MEMCPY in zutil.h. If you don't need the mixed model,
+ * just define FAR to be empty.
+ */
+#ifdef SYS16BIT
+# if defined(M_I86SM) || defined(M_I86MM)
+ /* MSC small or medium model */
+# define SMALL_MEDIUM
+# ifdef _MSC_VER
+# define FAR _far
+# else
+# define FAR far
+# endif
+# endif
+# if (defined(__SMALL__) || defined(__MEDIUM__))
+ /* Turbo C small or medium model */
+# define SMALL_MEDIUM
+# ifdef __BORLANDC__
+# define FAR _far
+# else
+# define FAR far
+# endif
+# endif
+#endif
+
+#if defined(WINDOWS) || defined(WIN32)
+ /* If building or using zlib as a DLL, define ZLIB_DLL.
+ * This is not mandatory, but it offers a little performance increase.
+ */
+# ifdef ZLIB_DLL
+# if defined(WIN32) && (!defined(__BORLANDC__) || (__BORLANDC__ >= 0x500))
+# ifdef ZLIB_INTERNAL
+# define ZEXTERN extern __declspec(dllexport)
+# else
+# define ZEXTERN extern __declspec(dllimport)
+# endif
+# endif
+# endif /* ZLIB_DLL */
+ /* If building or using zlib with the WINAPI/WINAPIV calling convention,
+ * define ZLIB_WINAPI.
+ * Caution: the standard ZLIB1.DLL is NOT compiled using ZLIB_WINAPI.
+ */
+# ifdef ZLIB_WINAPI
+# ifdef FAR
+# undef FAR
+# endif
+# ifndef WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+# endif
+# include <windows.h>
+ /* No need for _export, use ZLIB.DEF instead. */
+ /* For complete Windows compatibility, use WINAPI, not __stdcall. */
+# define ZEXPORT WINAPI
+# ifdef WIN32
+# define ZEXPORTVA WINAPIV
+# else
+# define ZEXPORTVA FAR CDECL
+# endif
+# endif
+#endif
+
+#if defined (__BEOS__)
+# ifdef ZLIB_DLL
+# ifdef ZLIB_INTERNAL
+# define ZEXPORT __declspec(dllexport)
+# define ZEXPORTVA __declspec(dllexport)
+# else
+# define ZEXPORT __declspec(dllimport)
+# define ZEXPORTVA __declspec(dllimport)
+# endif
+# endif
+#endif
+
+#ifndef ZEXTERN
+# define ZEXTERN extern
+#endif
+#ifndef ZEXPORT
+# define ZEXPORT
+#endif
+#ifndef ZEXPORTVA
+# define ZEXPORTVA
+#endif
+
+#ifndef FAR
+# define FAR
+#endif
+
+#if !defined(__MACTYPES__)
+typedef unsigned char Byte; /* 8 bits */
+#endif
+typedef unsigned int uInt; /* 16 bits or more */
+typedef unsigned long uLong; /* 32 bits or more */
+
+#ifdef SMALL_MEDIUM
+ /* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
+# define Bytef Byte FAR
+#else
+ typedef Byte FAR Bytef;
+#endif
+typedef char FAR charf;
+typedef int FAR intf;
+typedef uInt FAR uIntf;
+typedef uLong FAR uLongf;
+
+#ifdef STDC
+ typedef void const *voidpc;
+ typedef void FAR *voidpf;
+ typedef void *voidp;
+#else
+ typedef Byte const *voidpc;
+ typedef Byte FAR *voidpf;
+ typedef Byte *voidp;
+#endif
+
+#if !defined(Z_U4) && !defined(Z_SOLO) && defined(STDC)
+# include <limits.h>
+# if (UINT_MAX == 0xffffffffUL)
+# define Z_U4 unsigned
+# elif (ULONG_MAX == 0xffffffffUL)
+# define Z_U4 unsigned long
+# elif (USHRT_MAX == 0xffffffffUL)
+# define Z_U4 unsigned short
+# endif
+#endif
+
+#ifdef Z_U4
+ typedef Z_U4 z_crc_t;
+#else
+ typedef unsigned long z_crc_t;
+#endif
+
+#ifdef HAVE_UNISTD_H /* may be set to #if 1 by ./configure */
+# define Z_HAVE_UNISTD_H
+#endif
+
+#ifdef HAVE_STDARG_H /* may be set to #if 1 by ./configure */
+# define Z_HAVE_STDARG_H
+#endif
+
+#ifdef STDC
+# ifndef Z_SOLO
+# include <sys/types.h> /* for off_t */
+# endif
+#endif
+
+#if defined(STDC) || defined(Z_HAVE_STDARG_H)
+# ifndef Z_SOLO
+# include <stdarg.h> /* for va_list */
+# endif
+#endif
+
+#ifdef _WIN32
+# ifndef Z_SOLO
+# include <stddef.h> /* for wchar_t */
+# endif
+#endif
+
+/* a little trick to accommodate both "#define _LARGEFILE64_SOURCE" and
+ * "#define _LARGEFILE64_SOURCE 1" as requesting 64-bit operations, (even
+ * though the former does not conform to the LFS document), but considering
+ * both "#undef _LARGEFILE64_SOURCE" and "#define _LARGEFILE64_SOURCE 0" as
+ * equivalently requesting no 64-bit operations
+ */
+#if defined(_LARGEFILE64_SOURCE) && -_LARGEFILE64_SOURCE - -1 == 1
+# undef _LARGEFILE64_SOURCE
+#endif
+
+#ifndef Z_HAVE_UNISTD_H
+# ifdef __WATCOMC__
+# define Z_HAVE_UNISTD_H
+# endif
+#endif
+#ifndef Z_HAVE_UNISTD_H
+# if defined(_LARGEFILE64_SOURCE) && !defined(_WIN32)
+# define Z_HAVE_UNISTD_H
+# endif
+#endif
+#ifndef Z_SOLO
+# if defined(Z_HAVE_UNISTD_H)
+# include <unistd.h> /* for SEEK_*, off_t, and _LFS64_LARGEFILE */
+# ifdef VMS
+# include <unixio.h> /* for off_t */
+# endif
+# ifndef z_off_t
+# define z_off_t off_t
+# endif
+# endif
+#endif
+
+#if defined(_LFS64_LARGEFILE) && _LFS64_LARGEFILE-0
+# define Z_LFS64
+#endif
+
+#if defined(_LARGEFILE64_SOURCE) && defined(Z_LFS64)
+# define Z_LARGE64
+#endif
+
+#if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS-0 == 64 && defined(Z_LFS64)
+# define Z_WANT64
+#endif
+
+#if !defined(SEEK_SET) && !defined(Z_SOLO)
+# define SEEK_SET 0 /* Seek from beginning of file. */
+# define SEEK_CUR 1 /* Seek from current position. */
+# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
+#endif
+
+#ifndef z_off_t
+# define z_off_t long
+#endif
+
+#if !defined(_WIN32) && defined(Z_LARGE64)
+# define z_off64_t off64_t
+#else
+# if defined(_WIN32) && !defined(__GNUC__) && !defined(Z_SOLO)
+# define z_off64_t __int64
+# else
+# define z_off64_t z_off_t
+# endif
+#endif
+
+/* MVS linker does not support external names larger than 8 bytes */
+#if defined(__MVS__)
+ #pragma map(deflateInit_,"DEIN")
+ #pragma map(deflateInit2_,"DEIN2")
+ #pragma map(deflateEnd,"DEEND")
+ #pragma map(deflateBound,"DEBND")
+ #pragma map(inflateInit_,"ININ")
+ #pragma map(inflateInit2_,"ININ2")
+ #pragma map(inflateEnd,"INEND")
+ #pragma map(inflateSync,"INSY")
+ #pragma map(inflateSetDictionary,"INSEDI")
+ #pragma map(compressBound,"CMBND")
+ #pragma map(inflate_table,"INTABL")
+ #pragma map(inflate_fast,"INFA")
+ #pragma map(inflate_copyright,"INCOPY")
+#endif
+
+#endif /* ZCONF_H */
diff --git a/zlib.3 b/zlib.3
new file mode 100644
index 0000000..6f6e914
--- /dev/null
+++ b/zlib.3
@@ -0,0 +1,149 @@
+.TH ZLIB 3 "13 Oct 2022"
+.SH NAME
+zlib \- compression/decompression library
+.SH SYNOPSIS
+[see
+.I zlib.h
+for full description]
+.SH DESCRIPTION
+The
+.I zlib
+library is a general purpose data compression library.
+The code is thread safe, assuming that the standard library functions
+used are thread safe, such as memory allocation routines.
+It provides in-memory compression and decompression functions,
+including integrity checks of the uncompressed data.
+This version of the library supports only one compression method (deflation)
+but other algorithms may be added later
+with the same stream interface.
+.LP
+Compression can be done in a single step if the buffers are large enough
+or can be done by repeated calls of the compression function.
+In the latter case,
+the application must provide more input and/or consume the output
+(providing more output space) before each call.
+.LP
+The library also supports reading and writing files in
+.IR gzip (1)
+(.gz) format
+with an interface similar to that of stdio.
+.LP
+The library does not install any signal handler.
+The decoder checks the consistency of the compressed data,
+so the library should never crash even in the case of corrupted input.
+.LP
+All functions of the compression library are documented in the file
+.IR zlib.h .
+The distribution source includes examples of use of the library
+in the files
+.I test/example.c
+and
+.IR test/minigzip.c,
+as well as other examples in the
+.IR examples/
+directory.
+.LP
+Changes to this version are documented in the file
+.I ChangeLog
+that accompanies the source.
+.LP
+.I zlib
+is built in to many languages and operating systems, including but not limited to
+Java, Python, .NET, PHP, Perl, Ruby, Swift, and Go.
+.LP
+An experimental package to read and write files in the .zip format,
+written on top of
+.I zlib
+by Gilles Vollant (info@winimage.com),
+is available at:
+.IP
+http://www.winimage.com/zLibDll/minizip.html
+and also in the
+.I contrib/minizip
+directory of the main
+.I zlib
+source distribution.
+.SH "SEE ALSO"
+The
+.I zlib
+web site can be found at:
+.IP
+http://zlib.net/
+.LP
+The data format used by the
+.I zlib
+library is described by RFC
+(Request for Comments) 1950 to 1952 in the files:
+.IP
+http://tools.ietf.org/html/rfc1950 (for the zlib header and trailer format)
+.br
+http://tools.ietf.org/html/rfc1951 (for the deflate compressed data format)
+.br
+http://tools.ietf.org/html/rfc1952 (for the gzip header and trailer format)
+.LP
+Mark Nelson wrote an article about
+.I zlib
+for the Jan. 1997 issue of Dr. Dobb's Journal;
+a copy of the article is available at:
+.IP
+http://marknelson.us/1997/01/01/zlib-engine/
+.SH "REPORTING PROBLEMS"
+Before reporting a problem,
+please check the
+.I zlib
+web site to verify that you have the latest version of
+.IR zlib ;
+otherwise,
+obtain the latest version and see if the problem still exists.
+Please read the
+.I zlib
+FAQ at:
+.IP
+http://zlib.net/zlib_faq.html
+.LP
+before asking for help.
+Send questions and/or comments to zlib@gzip.org,
+or (for the Windows DLL version) to Gilles Vollant (info@winimage.com).
+.SH AUTHORS AND LICENSE
+Version 1.2.13
+.LP
+Copyright (C) 1995-2022 Jean-loup Gailly and Mark Adler
+.LP
+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.
+.LP
+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:
+.LP
+.nr step 1 1
+.IP \n[step]. 3
+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.
+.IP \n+[step].
+Altered source versions must be plainly marked as such, and must not be
+misrepresented as being the original software.
+.IP \n+[step].
+This notice may not be removed or altered from any source distribution.
+.LP
+Jean-loup Gailly Mark Adler
+.br
+jloup@gzip.org madler@alumni.caltech.edu
+.LP
+The deflate format used by
+.I zlib
+was defined by Phil Katz.
+The deflate and
+.I zlib
+specifications were written by L. Peter Deutsch.
+Thanks to all the people who reported problems and suggested various
+improvements in
+.IR zlib ;
+who are too numerous to cite here.
+.LP
+UNIX manual page by R. P. C. Rodgers,
+U.S. National Library of Medicine (rodgers@nlm.nih.gov).
+.\" end of man page
diff --git a/zlib.map b/zlib.map
new file mode 100644
index 0000000..b330b60
--- /dev/null
+++ b/zlib.map
@@ -0,0 +1,100 @@
+ZLIB_1.2.0 {
+ global:
+ compressBound;
+ deflateBound;
+ inflateBack;
+ inflateBackEnd;
+ inflateBackInit_;
+ inflateCopy;
+ local:
+ deflate_copyright;
+ inflate_copyright;
+ inflate_fast;
+ inflate_table;
+ zcalloc;
+ zcfree;
+ z_errmsg;
+ gz_error;
+ gz_intmax;
+ _*;
+};
+
+ZLIB_1.2.0.2 {
+ gzclearerr;
+ gzungetc;
+ zlibCompileFlags;
+} ZLIB_1.2.0;
+
+ZLIB_1.2.0.8 {
+ deflatePrime;
+} ZLIB_1.2.0.2;
+
+ZLIB_1.2.2 {
+ adler32_combine;
+ crc32_combine;
+ deflateSetHeader;
+ inflateGetHeader;
+} ZLIB_1.2.0.8;
+
+ZLIB_1.2.2.3 {
+ deflateTune;
+ gzdirect;
+} ZLIB_1.2.2;
+
+ZLIB_1.2.2.4 {
+ inflatePrime;
+} ZLIB_1.2.2.3;
+
+ZLIB_1.2.3.3 {
+ adler32_combine64;
+ crc32_combine64;
+ gzopen64;
+ gzseek64;
+ gztell64;
+ inflateUndermine;
+} ZLIB_1.2.2.4;
+
+ZLIB_1.2.3.4 {
+ inflateReset2;
+ inflateMark;
+} ZLIB_1.2.3.3;
+
+ZLIB_1.2.3.5 {
+ gzbuffer;
+ gzoffset;
+ gzoffset64;
+ gzclose_r;
+ gzclose_w;
+} ZLIB_1.2.3.4;
+
+ZLIB_1.2.5.1 {
+ deflatePending;
+} ZLIB_1.2.3.5;
+
+ZLIB_1.2.5.2 {
+ deflateResetKeep;
+ gzgetc_;
+ inflateResetKeep;
+} ZLIB_1.2.5.1;
+
+ZLIB_1.2.7.1 {
+ inflateGetDictionary;
+ gzvprintf;
+} ZLIB_1.2.5.2;
+
+ZLIB_1.2.9 {
+ inflateCodesUsed;
+ inflateValidate;
+ uncompress2;
+ gzfread;
+ gzfwrite;
+ deflateGetDictionary;
+ adler32_z;
+ crc32_z;
+} ZLIB_1.2.7.1;
+
+ZLIB_1.2.12 {
+ crc32_combine_gen;
+ crc32_combine_gen64;
+ crc32_combine_op;
+} ZLIB_1.2.9;
diff --git a/zlib.pc.cmakein b/zlib.pc.cmakein
new file mode 100644
index 0000000..a5e6429
--- /dev/null
+++ b/zlib.pc.cmakein
@@ -0,0 +1,13 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=@CMAKE_INSTALL_PREFIX@
+libdir=@INSTALL_LIB_DIR@
+sharedlibdir=@INSTALL_LIB_DIR@
+includedir=@INSTALL_INC_DIR@
+
+Name: zlib
+Description: zlib compression library
+Version: @VERSION@
+
+Requires:
+Libs: -L${libdir} -L${sharedlibdir} -lz
+Cflags: -I${includedir}
