Use pthread required package when building on Windows.

Add ZLIB as a requirement.

Author: ggbecker

CMakeLists.txt

@@ -143,10 +143,16 @@ find_package(LibXslt REQUIRED)
 find_package(BZip2)
 
 # PThread
+if (WIN32)
+	find_package(ZLIB REQUIRED)
+	find_package(pthread CONFIG REQUIRED)
+	set(CMAKE_THREAD_LIBS_INIT ${PThreads4W_LIBRARY})
+else()
+	find_package(Threads REQUIRED)
+endif()
 set(CMAKE_THREAD_PREFER_PTHREAD)
 set(THREADS_PREFER_PTHREAD_FLAG)
-set(THREADS_USE_PTHREADS_WIN32 true)
-find_package(Threads REQUIRED)
+set(THREADS_USE_PTHREADS_WIN32 TRUE)
 check_library_exists(pthread pthread_timedjoin_np "" HAVE_PTHREAD_TIMEDJOIN_NP)
 check_library_exists(pthread pthread_setname_np "" HAVE_PTHREAD_SETNAME_NP)
 check_library_exists(pthread pthread_getname_np "" HAVE_PTHREAD_GETNAME_NP)

appveyor.yml

@@ -7,7 +7,7 @@ image: Visual Studio 2017
 configuration: Release
 clone_folder: c:\projects\openscap
 install:
-- cmd: vcpkg install curl libxml2 libxslt bzip2 pcre pthreads
+- cmd: vcpkg install curl libxml2 libxslt bzip2 pcre pthreads zlib
 cache: c:\tools\vcpkg\installed\
 before_build:
 - cmd: >-