[CMAKE] Update build on recent Haiku

[korli]

Summary

cmake build support on Haiku is lagging a bit.

This patch updates cmake build scripts to build on Haiku. It adds Haiku x86_64 to config.guess.
Please consider reviewing.

[ I have no idea what Chris Lattner phab account is :/ ]

[rengolin]

Despite the GPL nature of config.guess, there are no changes in this patch that weren't made before {including by me), which were approved by various members of the community, including Chris Lattner. Not to mention that this config.guess was licensed GPLv2, so it should be ok.

I'm taking the leap of faith and approving this patch myself.

[rengolin]

Jerome, do you have commit access?

[korli]

In D17595#361738, @rengolin wrote:

Jerome, do you have commit access?

I don't. Do I have to commit myself?

[rengolin]

No, just making sure you didn't. Committed in r262038.

cheers,
--renato

[korli]

Thanks!

cmake/config-ix.cmake

 
 include(HandleLLVMStdlib)
 
-if( UNIX AND NOT BEOS )
+if( UNIX AND NOT (BEOS OR HAIKU) )
   # Used by check_symbol_exists:
   set(CMAKE_REQUIRED_LIBRARIES m)
 endif()

cmake/config.guess

     BePC:Haiku:*:*) # Haiku running on Intel PC compatible.
   echo i586-pc-haiku
   exit ;;
+    x86_64:Haiku:*:*) # Haiku running on x86_64.
+  echo x86_64-unknown-haiku
+  exit ;;
     SX-4:SUPER-UX:*:*)
   echo sx4-nec-superux${UNAME_RELEASE}
   exit ;;

include/llvm/Support/Host.h

 
 #include "llvm/ADT/StringMap.h"
 
-#if defined(__linux__) || defined(__GNU__)
+#if defined(__linux__) || defined(__GNU__) || defined(__HAIKU__)
 #include <endian.h>
 #else
 #if !defined(BYTE_ORDER) && !defined(LLVM_ON_WIN32)

lib/Support/CMakeLists.txt

     if ( LLVM_ENABLE_ZLIB AND HAVE_LIBZ )
       set(system_libs ${system_libs} z)
     endif()
-    set(system_libs ${system_libs} m)
+    if( UNIX AND NOT (BEOS OR HAIKU) )
+      set(system_libs ${system_libs} m)
+    endif()
   endif( MINGW )
 endif( NOT MSVC )