manta-use-system-zlib.patch

This patch originates from Debian:
https://anonscm.debian.org/cgit/debian-med/manta.git/tree/debian/patches/use_debian_packaged_zlib.patch

Author: Andreas Tille <tille@debian.org>
Last-Update: Tue, 15 Nov 2016 14:29:08 +0100
Description: Check for Debian packaged zlib

--- a/redist/CMakeLists.txt
+++ b/redist/CMakeLists.txt
@@ -50,56 +50,10 @@ endif ()
 #
 # zlib
 #
-set(ZLIB_PREFIX "zlib-1.2.8")
-superset(ZLIB_DIR "${CMAKE_CURRENT_BINARY_DIR}/${ZLIB_PREFIX}")
-if (WIN32)
-    superset(ZLIB_LIBRARY "${ZLIB_DIR}/${CMAKE_BUILD_TYPE}/zlibstatic.lib")
-else ()
-    superset(ZLIB_LIBRARY "${ZLIB_DIR}/libz.a")
-endif ()
-
-add_custom_command(
-	OUTPUT ${ZLIB_DIR}
-	COMMAND ${CMAKE_COMMAND} -E remove_directory "${ZLIB_DIR}"
-	COMMAND ${CMAKE_COMMAND} -E tar xjf "${THIS_REDIST_DIR}/${ZLIB_PREFIX}.tar.bz2"
-	COMMENT "Unpacking zlib package")
-
-if (NOT WIN32)
-    set (ASM_MAKE_OPTION LOC=-DASMV OBJA=match.o)
-    if (THIS_ARCH MATCHES "^.*86$")
-        set(ZLIB_ARCH "")
-        set(ASM_FILE_COPY cp contrib/asm686/match.S match.S)
-    elseif (THIS_ARCH MATCHES "^x86_64$")
-        set(ZLIB_ARCH "--64")
-        set(ASM_FILE_COPY cp contrib/amd64/amd64-match.S match.S)
-    else ()
-        set (ZLIB_ARCH "")
-        set (ASM_FILE_COPY "")
-        set (ASM_MAKE_OPTION "")
-    endif ()
-
-    add_custom_command(
-        OUTPUT ${ZLIB_LIBRARY}
-        COMMAND CC=${CMAKE_C_COMPILER} ${ZLIB_DIR}/configure --prefix="${ZLIB_DIR}" --static ${ZLIB_ARCH} >zlib.config.log
-        COMMAND ${ASM_FILE_COPY}
-        COMMAND $(MAKE) ${ASM_MAKE_OPTION} >zlib.build.log 2>zlib.build.error.log
-        WORKING_DIRECTORY ${ZLIB_DIR}
-        DEPENDS ${ZLIB_DIR}
-        COMMENT "Building zlib package")
-else ()
-    add_custom_command(
-        OUTPUT ${ZLIB_LIBRARY}
-        COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" ${THIS_CMAKE_PLATFORM} -DCMAKE_C_COMPILER="${CMAKE_C_COMPILER}" ${ZLIB_DIR} >zlib.config.log
-        COMMAND ${CMAKE_MAKE_PROGRAM}  /p:Configuration=${CMAKE_BUILD_TYPE} "${ZLIB_DIR}/zlib.sln" >zlib.build.log
-        WORKING_DIRECTORY ${ZLIB_DIR}
-        DEPENDS ${ZLIB_DIR}
-        COMMENT "Building zlib package")
-endif ()
-
-
-set(THIS_ZLIB "${THIS_PROJECT_NAME}_zlib")
-add_custom_target(${THIS_ZLIB} DEPENDS "${ZLIB_LIBRARY}")
-
+find_package(ZLIB REQUIRED)
+if (ZLIB_FOUND)
+  set(HAVE_ZLIB 1)
+endif()
 
 #
 # htslib