FIX: propagation dependencies under linux

cmake/generic.cmake

@@ -104,6 +104,7 @@ function(merge_static_libs TARGET_NAME)
     list(APPEND libs_deps ${${lib}_LIB_DEPENDS})
   endforeach()
 
+  if(APPLE) # Use OSX's libtool to merge archives
     # To produce a library we need at least one source file.
     # It is created by add_custom_command below and will helps 
     # also help to track dependencies.
@@ -125,11 +126,6 @@ function(merge_static_libs TARGET_NAME)
       # Get the file names of the libraries to be merged
       set(libfiles ${libfiles} $<TARGET_FILE:${lib}>)
     endforeach()
-
-  # Get the file name of the generated library
-  set(outlibfile "$<TARGET_FILE:${TARGET_NAME}>")
-
-  if(APPLE) # Use OSX's libtool to merge archives
 		add_custom_command(TARGET ${TARGET_NAME} POST_BUILD
       COMMAND rm "${CMAKE_CURRENT_BINARY_DIR}/lib${TARGET_NAME}.a"
       COMMAND /usr/bin/libtool -static -o "${CMAKE_CURRENT_BINARY_DIR}/lib${TARGET_NAME}.a" ${libfiles})
@@ -148,13 +144,27 @@ function(merge_static_libs TARGET_NAME)
         DEPENDS ${lib} ${objdir}
         WORKING_DIRECTORY ${objdir})
 
-      add_custom_command(TARGET ${TARGET_NAME} POST_BUILD
-        COMMAND ${CMAKE_AR} ru ${outlibfile} *.o 
-        WORKING_DIRECTORY ${objdir})
+      # Empty dummy source file that goes into merged library		
+      set(mergebase ${lib}.mergebase.c)		
+      add_custom_command(OUTPUT ${mergebase}		
+        COMMAND ${CMAKE_COMMAND} -E touch ${mergebase}		
+        DEPENDS ${objlistfile})		
+
+      list(APPEND mergebases "${mergebase}")
     endforeach()
 
+    add_library(${TARGET_NAME} STATIC ${mergebases})
+    target_link_libraries(${TARGET_NAME} ${libs_deps}) 
+
+    # Get the file name of the generated library
+    set(outlibfile "$<TARGET_FILE:${TARGET_NAME}>")
+
+    foreach(lib ${libs})
       add_custom_command(TARGET ${TARGET_NAME} POST_BUILD
-      COMMAND ${CMAKE_RANLIB} ${outlibfile})
+        COMMAND ${CMAKE_AR} cr ${outlibfile} *.o  
+        COMMAND ${CMAKE_RANLIB} ${outlibfile}
+        WORKING_DIRECTORY ${lib}.objdir)
+    endforeach()
   endif()
 endfunction(merge_static_libs)