Haiku: Several fixes to platform module

* Do not define BEOS anymore (this includes workarounds which we don't
  need most of the time in Haiku, so we prefer opt-in IF(HAIKU) in the
  cmake files instead).
* On the other hand, do define UNIX (we are trying to be compliant) and
  HAIKU (there is still a number of things we don't do like the
  average UNIX clone)
* Do not use UnixPaths, as our filesystem hierarchy isn't anything like
  what it expects.
* Do not use -nostart, which the compiler doesn't know about anymore.
  This used to be an Haiku extension to gcc, and is equivalent to
  -shared which is the default gcc option.
* While "dl" functions are provided in libroot, this is always
  implicitly linked so there is no need to tell cmake about it.
* Forcing position-independent code is not needed, so remove it.
* On the other hand, include appropriate linker options for executables
  and shared libraries.
* Support for the two available compilers in Haiku (gcc2 and gcc4) and
  pick the right headers and libraries according to the currently
  selected one.
* With the adoption of the package manager, the directory layout was
  changed. Tell cmake where to look for header files and libraries.
* As we don't define BEOS anymore, enable the workaround we still need
  for HAIKU as well. This is the lack of a libm (it is part of the
  implicitly linked in libroot)

Applied-by: Rolf Eike Beer <eike@sf-mail.de>

2 files changed, 115 insertions, 14 deletions

diff --git a/Modules/FindLua51.cmake b/Modules/FindLua51.cmake
index a2bf0c0..770e93a 100644
--- a/Modules/FindLua51.cmake
+++ b/Modules/FindLua51.cmake
@@ -54,7 +54,7 @@ find_library(LUA_LIBRARY
 
 if(LUA_LIBRARY)
   # include the math library for Unix
-  if(UNIX AND NOT APPLE AND NOT BEOS)
+  if(UNIX AND NOT APPLE AND NOT BEOS AND NOT HAIKU)
     find_library(LUA_MATH_LIBRARY m)
     set( LUA_LIBRARIES "${LUA_LIBRARY};${LUA_MATH_LIBRARY}" CACHE STRING "Lua Libraries")
   # For Windows and Mac, don't need to explicitly include the math library
diff --git a/Modules/Platform/Haiku.cmake b/Modules/Platform/Haiku.cmake
index 8987783..825f851 100644
--- a/Modules/Platform/Haiku.cmake
+++ b/Modules/Platform/Haiku.cmake
@@ -1,22 +1,123 @@
-set(BEOS 1)
+# process only once
+if(HAIKU)
+  return()
+endif()
+
+set(HAIKU 1)
+set(UNIX 1)
 
-set(CMAKE_DL_LIBS root be)
-set(CMAKE_C_COMPILE_OPTIONS_PIC "-fPIC")
-set(CMAKE_C_COMPILE_OPTIONS_PIE "-fPIE")
+set(CMAKE_DL_LIBS "")
 set(CMAKE_SHARED_LIBRARY_C_FLAGS "-fPIC")
-set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-nostart")
+set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-shared")
 set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG "-Wl,-rpath,")
 set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP ":")
+set(CMAKE_SHARED_LIBRARY_RPATH_LINK_C_FLAG "-Wl,-rpath-link,")
 set(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG "-Wl,-soname,")
+set(CMAKE_EXE_EXPORTS_C_FLAG "-Wl,--export-dynamic")
+
+# Determine, if the C or C++ compiler is configured for a secondary
+# architecture. If so, that will change the search paths we set below. We check
+# whether the compiler's library search paths contain a
+# "/boot/system/develop/lib/<subdir>/", which we assume to be the secondary
+# architecture specific subdirectory and extract the name of the architecture
+# accordingly.
+set(__HAIKU_COMPILER ${CMAKE_C_COMPILER})
+
+if(NOT __HAIKU_COMPILER)
+  set(__HAIKU_COMPILER ${CMAKE_CXX_COMPILER})
+endif()
+
+execute_process(
+  COMMAND ${__HAIKU_COMPILER} -print-search-dirs
+  OUTPUT_VARIABLE _HAIKU_SEARCH_DIRS
+  OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+string(REGEX MATCH ".*\nlibraries: =?([^\n]*:)?/boot/system/develop/lib/([^/]*)/(:[^\n]*)?\n.*" _dummy "\n${_HAIKU_SEARCH_DIRS}\n")
+set(CMAKE_HAIKU_SECONDARY_ARCH "${CMAKE_MATCH_2}")
+
+if(NOT CMAKE_HAIKU_SECONDARY_ARCH)
+  set(CMAKE_HAIKU_SECONDARY_ARCH_SUBDIR "")
+  unset(CMAKE_HAIKU_SECONDARY_ARCH)
+else()
+  set(CMAKE_HAIKU_SECONDARY_ARCH_SUBDIR "/${CMAKE_HAIKU_SECONDARY_ARCH}")
+
+  # Override CMAKE_*LIBRARY_ARCHITECTURE. This will cause FIND_LIBRARY to search
+  # the libraries in the correct subdirectory first. It still isn't completely
+  # correct, since the parent directories shouldn't be searched at all. The
+  # primary architecture library might still be found, if there isn't one
+  # installed for the secondary architecture or it is installed in a less
+  # specific location.
+  set(CMAKE_LIBRARY_ARCHITECTURE ${CMAKE_HAIKU_SECONDARY_ARCH})
+  set(CMAKE_C_LIBRARY_ARCHITECTURE ${CMAKE_HAIKU_SECONDARY_ARCH})
+  set(CMAKE_CXX_LIBRARY_ARCHITECTURE ${CMAKE_HAIKU_SECONDARY_ARCH})
+endif()
+
+list(APPEND CMAKE_SYSTEM_PREFIX_PATH
+  /boot/common/non-packaged
+  /boot/common
+  /boot/system
+  )
+
+LIST(APPEND CMAKE_HAIKU_COMMON_INCLUDE_DIRECTORIES
+  /boot/common/non-packaged/develop/headers${CMAKE_HAIKU_SECONDARY_ARCH_SUBDIR}
+  /boot/common/develop/headers${CMAKE_HAIKU_SECONDARY_ARCH_SUBDIR}
+  /boot/system/develop/headers/os
+  /boot/system/develop/headers/os/app
+  /boot/system/develop/headers/os/device
+  /boot/system/develop/headers/os/drivers
+  /boot/system/develop/headers/os/game
+  /boot/system/develop/headers/os/interface
+  /boot/system/develop/headers/os/kernel
+  /boot/system/develop/headers/os/locale
+  /boot/system/develop/headers/os/mail
+  /boot/system/develop/headers/os/media
+  /boot/system/develop/headers/os/midi
+  /boot/system/develop/headers/os/midi2
+  /boot/system/develop/headers/os/net
+  /boot/system/develop/headers/os/opengl
+  /boot/system/develop/headers/os/storage
+  /boot/system/develop/headers/os/support
+  /boot/system/develop/headers/os/translation
+  /boot/system/develop/headers/os/add-ons/graphics
+  /boot/system/develop/headers/os/add-ons/input_server
+  /boot/system/develop/headers/os/add-ons/screen_saver
+  /boot/system/develop/headers/os/add-ons/tracker
+  /boot/system/develop/headers/os/be_apps/Deskbar
+  /boot/system/develop/headers/os/be_apps/NetPositive
+  /boot/system/develop/headers/os/be_apps/Tracker
+  /boot/system/develop/headers/3rdparty
+  /boot/system/develop/headers/bsd
+  /boot/system/develop/headers/glibc
+  /boot/system/develop/headers/gnu
+  /boot/system/develop/headers/posix
+  /boot/system/develop/headers${CMAKE_HAIKU_SECONDARY_ARCH_SUBDIR}
+  )
+IF (CMAKE_HAIKU_SECONDARY_ARCH)
+  LIST(APPEND CMAKE_HAIKU_COMMON_INCLUDE_DIRECTORIES
+    /boot/system/develop/headers
+    )
+ENDIF (CMAKE_HAIKU_SECONDARY_ARCH)
+
+LIST(APPEND CMAKE_HAIKU_C_INCLUDE_DIRECTORIES
+  ${CMAKE_HAIKU_COMMON_INCLUDE_DIRECTORIES}
+  )
+
+LIST(APPEND CMAKE_HAIKU_CXX_INCLUDE_DIRECTORIES
+  ${CMAKE_HAIKU_COMMON_INCLUDE_DIRECTORIES})
+
+LIST(APPEND CMAKE_SYSTEM_INCLUDE_PATH ${CMAKE_HAIKU_C_INCLUDE_DIRECTORIES})
+
+LIST(APPEND CMAKE_HAIKU_DEVELOP_LIB_DIRECTORIES
+  /boot/common/non-packaged/develop/lib${CMAKE_HAIKU_SECONDARY_ARCH_SUBDIR}
+  /boot/common/develop/lib${CMAKE_HAIKU_SECONDARY_ARCH_SUBDIR}
+  /boot/system/develop/lib${CMAKE_HAIKU_SECONDARY_ARCH_SUBDIR}
+  )
+
+LIST(APPEND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES
+  ${CMAKE_HAIKU_DEVELOP_LIB_DIRECTORIES}
+  )
 
-include(Platform/UnixPaths)
-list(APPEND CMAKE_SYSTEM_PREFIX_PATH /boot/common)
-list(APPEND CMAKE_SYSTEM_INCLUDE_PATH /boot/common/include)
-list(APPEND CMAKE_SYSTEM_LIBRARY_PATH /boot/common/lib)
-list(APPEND CMAKE_SYSTEM_PROGRAM_PATH /boot/common/bin)
-list(APPEND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES /boot/common/lib)
-list(APPEND CMAKE_SYSTEM_INCLUDE_PATH /boot/develop/headers/3rdparty)
-list(APPEND CMAKE_SYSTEM_LIBRARY_PATH /boot/develop/lib/x86)
+LIST(APPEND CMAKE_SYSTEM_LIBRARY_PATH ${CMAKE_HAIKU_DEVELOP_LIB_DIRECTORIES})
 
 if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
   set(CMAKE_INSTALL_PREFIX "/boot/common" CACHE PATH