ENH: add beos file

Modules/Platform/BeOS.cmake

@@ -0,0 +1,10 @@
+# GCC is the default compiler on BeOS.
+INCLUDE(${CMAKE_ROOT}/Modules/Platform/gcc.cmake)
+
+SET(CMAKE_DL_LIBS root be)
+SET(CMAKE_SHARED_LIBRARY_C_FLAGS "-fPIC")
+SET(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-nostart")
+SET(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG "-Wl,-rpath,")
+SET(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP ":")
+SET(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG "-Wl,-soname,")
+SET(CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG "-Wl,-soname,")