pc386dx exception 6 was Re: 4.6.0pre2 and docs released

[Steven Johnson]

Angelo,

Change LDFLAGS += to be

LDFLAGS += --gc-sections

Unless LD Flags is passed to gcc or g++ and not ld, in which case use:
LDFALGS += -Wl,'--gc-sections'

I don't actually use GNU Make.  I Use JAM Instead.  The Make File 
(JamFile) is a lot cleaner, and I haven't used GNU Make files (other 
than what comes with RTEMS and other stuff in our own development for a 
long time, but this is where I would try.  You will need to look at the 
output of running Make to see if the link is perfromed with ld or gcc/g++.

Steven


Angelo Fraietta wrote:
> Steven Johnson wrote:
> 
>> Angelo,
>>
>> You put it in your make file. If you link your final app with GCC, you 
>> need to pass  -Wl,'--gc-sections' to g++.
>>
>> It also doesn't do anything unless you link with -static. (Which I 
>> would guess you would be doing anyway for a final link.)
>>
>> You will also need to put KEEP() around your .init section. (As well 
>> as others potentially)
>> You put this in your link script for your program.
>>
>> Steven
>>
> My makefile looks like this
> 
> 
> #  $Id: Makefile,v 1.18 2003/04/28 01:54:09 angelofraietta Exp $
> #
> # Templates/Makefile.leaf
> #     Template leaf node Makefile
> #
> 
> EXEC=smart.exe
> # C source names, if any, go here -- minus the .c
> C_PIECES=diags fsmount
> C_FILES=$(C_PIECES:%=%.c)
> C_O_FILES=$(C_PIECES:%=${ARCH}/%.o)
> 
> # C++ source names, if any, go here -- minus the .cc
> CC_PIECES=rtems_init \
>  midioutput \
>  scheduler \
>    rtems_simulator \
>    commtasks  
> CC_FILES=$(CC_PIECES:%=%.cpp)
> CC_O_FILES=$(CC_PIECES:%=${ARCH}/%.o)
> 
> H_FILES=
> 
> # Assembly source names, if any, go here -- minus the .S
> S_PIECES=
> S_FILES=$(S_PIECES:%=%.S)
> S_O_FILES=$(S_FILES:%.S=${ARCH}/%.o)
> 
> SRCS=$(C_FILES) $(CC_FILES) $(H_FILES) $(S_FILES)
> OBJS=$(C_O_FILES) $(CC_O_FILES) $(S_O_FILES)
> 
> PGMS=${ARCH}/$(EXEC) #${ARCH}/xxx-another-one
> 
> # List of RTEMS managers to be included in the application goes here.
> # Use:
> #     MANAGERS=all
> # to include all RTEMS managers in the application.
> MANAGERS=io event message rate_monotonic semaphore timer
> 
> include $(RTEMS_MAKEFILE_PATH)/Makefile.inc
> 
> include $(RTEMS_CUSTOM)
> include $(RTEMS_ROOT)/make/leaf.cfg
> 
> #
> # (OPTIONAL) Add local stuff here using +=
> #
> 
> DEFINES  += -D_E_STL
> CPPFLAGS += -I ../../../estl
> CPPFLAGS += -I ../engine
> CPPFLAGS += -I ../engineinterface
> CPPFLAGS += -I ../hal_include
> CPPFLAGS += -I ../link_driver
> CPPFLAGS += -I ../../../threads/source
> CPPFLAGS += -I ../../../mididriver
> CPPFLAGS += -I ../../../mididriver/hal_rtems
> 
> XCPPFLAGS +=
> CFLAGS   +=
> 
> #
> # CFLAGS_DEBUG_V are used when the `make debug' target is built.
> # To link your application with the non-optimized RTEMS routines,
> # uncomment the following line:
> # CFLAGS_DEBUG_V += -qrtems_debug
> #
> 
> LD_PATHS  +=  #xxx-your-EXTRA-library-paths-go-here, if any
> 
> LD_LIBS   +=  ../engine/$(ARCH)/sm_engine.a LD_LIBS   +=  
> ../engineinterface/$(ARCH)/sm_engineinterface.a LD_LIBS   +=  
> ../engine/$(ARCH)/sm_engine.a LD_LIBS   +=  
> ../link_driver/$(ARCH)/sm_link_driver.a LD_LIBS   +=  
> ../link_driver/hal_rtems/$(ARCH)/sm_comm.a LD_LIBS   +=  
> ../../../threads/source/$(ARCH)/sm_rtems_active.a LD_LIBS   +=  
> ../../../threads/source/hal_rtems/$(ARCH)/sm_rtems_thread.a LD_LIBS   
> +=  ../../../mididriver/hal_rtems/$(ARCH)/rtems_midi.a
> 
> LDFLAGS   +=
> 
> #
> # Add your list of files to delete here.  The config files
> #  already know how to delete some stuff, so you may want
> #  to just run 'make clean' first to see what gets missed.
> #  'make clobber' already includes 'make clean'
> #
> 
> CLEAN_ADDITIONS +=
> CLOBBER_ADDITIONS +=
> 
> all:    ${ARCH} $(SRCS) $(PGMS)
> 
> ${ARCH}/$(EXEC): ${OBJS} ${LINK_FILES}
>    $(make-cxx-exe)
> 
> # Install the program(s), appending _g or _p as appropriate.
> # for include files, just use $(INSTALL_CHANGE)
> install:  all
>    $(INSTALL_VARIANT) -m 555 ${PGMS} ${PROJECT_RELEASE}/bin
> 
> 
> 
> What ammendments would you make to remove all unnecessary code during 
> the link.
> 
>>
>>
>>
>> Angelo Fraietta wrote:
>>
>>>
>>>
>>> Steven Johnson wrote:
>>>
>>>> To remove anything that is not used, you need to pass --gc-sections 
>>>> to linker.  See ld manual for details.  I don't think it removes 
>>>> absolutely everything that isn't used, but it removes a lot.  Also 
>>>> look up KEEP directive for linker script as you may need this for 
>>>> .init section.
>>>
>>>
>>>
>>>
>>> Is this something that I can do from my Makefile or is it something 
>>> that needs to be done from within the BSP files.
>>>
>>
>>
>>
>