Remove Intel zlib support due to broken CMake (intel/zlib#25)

README.md

@@ -13,48 +13,47 @@ This is the simplest way to compile pigz. Type "make" in the source directory ("
 
 ## Compiling with CMake
 
-Compiling with CMake is more complicated than using Make. However, it does allow you to use different variants of the zlib compression library that can [improve](https://github.com/neurolabusc/pigz-bench) performance. Compiling with CMake requires the computer to have CMake and git installed. By default, CMake will use the [CloudFlare zlib](https://github.com/cloudflare/zlib):
+Compiling with CMake is more complicated than using Make. However, it does allow you to use different variants of the zlib compression library that can [improve](https://github.com/neurolabusc/pigz-bench) performance. Compiling with CMake requires the computer to have CMake and git installed. By default, CMake will use the [CloudFlare zlib](https://github.com/cloudflare/zlib) which provides outstanding compression performance:
 
 ```
-git clone https://github.com/neurolabusc/pigz.git
+git clone https://github.com/madler/pigz
 cd pigz
 mkdir build && cd build
 cmake ..
 make
 ```
 
-Alternatively, you can build for [zlib-ng](https://github.com/zlib-ng/zlib-ng):
+Alternatively, you can build for your system zlib, which will likely provide the poorest performance (but is the most popular so least likely to have any issues):
 
 ```
-git clone https://github.com/neurolabusc/pigz.git
+git clone https://github.com/madler/pigz
 cd pigz
 mkdir build && cd build
-cmake -DZLIB_IMPLEMENTATION=ng ..
+cmake -DZLIB_IMPLEMENTATION=System ..
 make
 ```
 
-Finally, you can build for your system zlib, which will likely provide the poorest performance (but is the most popular so least likely to have any issues):
+Finally, you can build for [zlib-ng](https://github.com/zlib-ng/zlib-ng). At the moment this provides compression performance between CloudFlare and System, but provides exceptionally fast decompression:
 
 ```
-git clone https://github.com/neurolabusc/pigz.git
+git clone https://github.com/madler/pigz
 cd pigz
 mkdir build && cd build
-cmake -DZLIB_IMPLEMENTATION=System ..
+cmake -DZLIB_IMPLEMENTATION=ng ..
 make
 ```
 
 Note that the process is a little different if you are using the Windows operating system. Windows users can compile using the [Microsoft C Compiler](https://visualstudio.microsoft.com/downloads/) or [MinGW](  http://mingw-w64.org/doku.php). Be aware there are several variations of the MinGW compiler, and the CMake script expects a version that supports the [-municode linker flag]( https://sourceforge.net/p/mingw-w64/wiki2/Unicode%20apps/). This flag is required to handle non-Latin letters in filenames. Here is an example of compiling on Windows targeting the Cloudflare zlib:
 
 ```
-git clone https://github.com/neurolabusc/pigz.git
+git clone https://github.com/madler/pigz
 cd pigz
 mkdir build
 cd build
 cmake  -DZLIB_IMPLEMENTATION=Cloudflare ..
 cmake --build . --config Release
 ```
 
-
 ## Details
 
 pigz 2.4 (26 Dec 2017) by Mark Adler

SuperBuild/External-CLOUDFLARE-ZLIB.cmake

@@ -1,7 +1,7 @@
 set(CLOUDFLARE_BRANCH gcc.amd64) # Cloudflare zlib branch
 
 ExternalProject_Add(zlib
-    GIT_REPOSITORY "${git_protocol}://github.com/ningfei/zlib.git"
+    GIT_REPOSITORY "${git_protocol}://github.com/cloudflare/zlib.git"
     GIT_TAG "${CLOUDFLARE_BRANCH}"
     SOURCE_DIR cloudflare-zlib
     BINARY_DIR cloudflare-zlib-build

SuperBuild/SuperBuild.cmake

@@ -63,18 +63,6 @@ if(${ZLIB_IMPLEMENTATION} STREQUAL "Cloudflare")
     list(APPEND DEPENDENCIES zlib)
     set(BUILD_CLOUDFLARE-ZLIB TRUE)
     message("--   Will build Cloudflare zlib from github")
-elseif(${ZLIB_IMPLEMENTATION} STREQUAL "Chromium")
-    message("-- Build with Chromium zlib: ON")
-    include(${CMAKE_SOURCE_DIR}/SuperBuild/External-CHROMIUM-ZLIB.cmake)
-    list(APPEND DEPENDENCIES zlib)
-    set(BUILD_CHROMIUM-ZLIB TRUE)
-    message("--   Will build Chromium zlib from github")
-elseif(${ZLIB_IMPLEMENTATION} STREQUAL "Intel")
-    message("-- Build with Intel zlib: ON")
-    include(${CMAKE_SOURCE_DIR}/SuperBuild/External-INTEL-ZLIB.cmake)
-    list(APPEND DEPENDENCIES zlib)
-    set(BUILD_INTEL-ZLIB TRUE)
-    message("--   Will build Intel zlib from github")
 elseif(${ZLIB_IMPLEMENTATION} STREQUAL "ng")
     message("-- Build with zlib-ng: ON")
     include(${CMAKE_SOURCE_DIR}/SuperBuild/External-ZLIBng.cmake)