Merge pull request #9474 from miqlas:haiku_support

CMakeLists.txt

@@ -544,7 +544,7 @@ if(UNIX)
     CHECK_INCLUDE_FILE(pthread.h HAVE_PTHREAD)
     if(ANDROID)
       set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} dl m log)
-    elseif(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD|NetBSD|DragonFly|OpenBSD")
+    elseif(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD|NetBSD|DragonFly|OpenBSD|Haiku")
       set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} m pthread)
     elseif(EMSCRIPTEN)
       # no need to link to system libs with emscripten

modules/core/src/system.cpp

@@ -66,7 +66,7 @@ Mutex* __initialization_mutex_initializer = &getInitializationMutex();
 # endif
 #endif
 
-#if defined __ANDROID__ || defined __linux__ || defined __FreeBSD__
+#if defined __ANDROID__ || defined __linux__ || defined __FreeBSD__ || defined __HAIKU__
 #  include <unistd.h>
 #  include <fcntl.h>
 #  include <elf.h>
@@ -202,7 +202,7 @@ std::wstring GetTempFileNameWinRT(std::wstring prefix)
 #include "omp.h"
 #endif
 
-#if defined __linux__ || defined __APPLE__ || defined __EMSCRIPTEN__ || defined __FreeBSD__
+#if defined __linux__ || defined __APPLE__ || defined __EMSCRIPTEN__ || defined __FreeBSD__ || defined __HAIKU__
 #include <unistd.h>
 #include <stdio.h>
 #include <sys/types.h>