ENH: Make sure to use internal zlib

Source/CMakeLists.txt

@@ -10,6 +10,8 @@ CONFIGURE_FILE(
 INCLUDE_DIRECTORIES(
   "${CMake_BINARY_DIR}/Source"
   "${CMake_SOURCE_DIR}/Source"
+  ${CMAKE_ZLIB_INCLUDES}
+  ${CMAKE_EXPAT_INCLUDES}
   )
 
 # let cmake know it is supposed to use it
@@ -127,7 +129,7 @@ ENDIF (WIN32)
 
 # create a library used by the command line and the GUI
 ADD_LIBRARY(CMakeLib ${SRCS})
-TARGET_LINK_LIBRARIES(CMakeLib cmsys ${CMAKE_EXPAT_LIBRARIES} cmzlib)
+TARGET_LINK_LIBRARIES(CMakeLib cmsys ${CMAKE_EXPAT_LIBRARIES} ${CMAKE_ZLIB_LIBRARIES})
 IF (UNIX)
   TARGET_LINK_LIBRARIES(CMakeLib ${CMAKE_DL_LIBS})
 ENDIF (UNIX)

Source/CTest/Curl/CMakeLists.txt

@@ -124,6 +124,13 @@ MACRO(CHECK_LIBRARY_EXISTS_CONCAT LIBRARY SYMBOL VARIABLE)
   ENDIF(${VARIABLE})
 ENDMACRO(CHECK_LIBRARY_EXISTS_CONCAT)
 
+IF(CURL_SPECIAL_LIBZ)
+  SET(CURL_LIBS ${CURL_LIBS} "${CURL_SPECIAL_LIBZ}")
+  INCLUDE_DIRECTORIES(${CURL_SPECIAL_LIBZ_INCLUDES})
+  SET(HAVE_LIBZ 0)
+  SET(HAVE_ZLIB_H 0)
+ENDIF(CURL_SPECIAL_LIBZ)
+
 # Check for all needed libraries
 CHECK_LIBRARY_EXISTS_CONCAT("dl"     dlopen       HAVE_LIBDL)
 CHECK_LIBRARY_EXISTS_CONCAT("ucb"    gethostname  HAVE_LIBUCB)
@@ -136,7 +143,9 @@ ENDIF(NOT NOT_NEED_LIBNSL)
 
 CHECK_LIBRARY_EXISTS_CONCAT("ws2_32" getch        HAVE_LIBWS2_32)
 CHECK_LIBRARY_EXISTS_CONCAT("winmm"  getch        HAVE_LIBWINMM)
-CHECK_LIBRARY_EXISTS_CONCAT("z"      inflateEnd   HAVE_LIBZ)
+IF(NOT CURL_SPECIAL_LIBZ)
+  CHECK_LIBRARY_EXISTS_CONCAT("z"      inflateEnd   HAVE_LIBZ)
+ENDIF(NOT CURL_SPECIAL_LIBZ)
 
 #OPTION(CMAKE_USE_OPENSSL "Use OpenSSL code. Experimental" OFF)
 MARK_AS_ADVANCED(CMAKE_USE_OPENSSL)
@@ -206,7 +215,9 @@ IF(CMAKE_USE_OPENSSL)
   CHECK_INCLUDE_FILE_CONCAT("openssl/rand.h"   HAVE_OPENSSL_RAND_H)
 ENDIF(CMAKE_USE_OPENSSL)
 
-CHECK_INCLUDE_FILE_CONCAT("zlib.h"           HAVE_ZLIB_H)
+IF(NOT CURL_SPECIAL_LIBZ)
+  CHECK_INCLUDE_FILE_CONCAT("zlib.h"           HAVE_ZLIB_H)
+ENDIF(NOT CURL_SPECIAL_LIBZ)
 CHECK_INCLUDE_FILE_CONCAT("sys/socket.h"     HAVE_SYS_SOCKET_H)
 CHECK_INCLUDE_FILE_CONCAT("netinet/in.h"     HAVE_NETINET_IN_H)
 CHECK_INCLUDE_FILE_CONCAT("net/if.h"         HAVE_NET_IF_H)
@@ -503,13 +514,15 @@ ENDIF(NOT HAVE_IN_ADDR_T)
 
 # Fix libz / zlib.h
 
-IF(NOT HAVE_LIBZ)
-  SET(HAVE_ZLIB_H 0)
-ENDIF(NOT HAVE_LIBZ)
+IF(NOT CURL_SPECIAL_LIBZ)
+  IF(NOT HAVE_LIBZ)
+    SET(HAVE_ZLIB_H 0)
+  ENDIF(NOT HAVE_LIBZ)
 
-IF(NOT HAVE_ZLIB_H)
-  SET(HAVE_LIBZ 0)
-ENDIF(NOT HAVE_ZLIB_H)
+  IF(NOT HAVE_ZLIB_H)
+    SET(HAVE_LIBZ 0)
+  ENDIF(NOT HAVE_ZLIB_H)
+ENDIF(NOT CURL_SPECIAL_LIBZ)
 
 IF(_FILE_OFFSET_BITS)
   SET(_FILE_OFFSET_BITS 64)
@@ -560,7 +573,6 @@ CONFIGURE_FILE(${LIBCURL_SOURCE_DIR}/config.h.in
   ${LIBCURL_BINARY_DIR}/config.h)
 
 ADD_LIBRARY(Curl ${libCurl_SRCS})
-
 TARGET_LINK_LIBRARIES(Curl ${CURL_LIBS})
 
 OPTION(CURL_TESTING "Do libCurl testing" OFF)

Source/CTest/Curl/config.h.in

@@ -507,3 +507,6 @@
 
 /* define if the compiler supports number 0x3627676LL */
 #cmakedefine HAVE_LONG_LONG_CONSTANT ${HAVE_LONG_LONG_CONSTANT}
+
+/* Special handling of zlib library */
+#cmakedefine CURL_SPECIAL_ZLIB_H "${CURL_SPECIAL_ZLIB_H}"

Source/CTest/Curl/urldata.h

@@ -78,9 +78,14 @@
 #include "timeval.h"
 
 #ifdef HAVE_ZLIB_H
+#error goo
 #include <zlib.h>               /* for content-encoding */
 #endif
 
+#ifdef CURL_SPECIAL_ZLIB_H
+#include CURL_SPECIAL_ZLIB_H
+#endif
+
 #ifdef USE_ARES
 #include <ares.h>
 #endif