Building binaries for L4Linux with IPC

[Adam Lackorzynski]

On Wed May 18, 2005 at 12:13:27 +0100, Tiago Jorge wrote:
> I am trying now to do IPC to my server from L4Linux.
> I'm not doing a Lib. I'm picking up the client code generated from dice, 
> build encapsulation code and i'm trying to use it in a simple program.
> I've made the makefile that looks like this:
> 
> ###########################################
> 
> PKGDIR          ?= ../..
> L4DIR           ?= $(PKGDIR)/../..
> 
> TARGET          = WOO_test
> SRC_CC          = WOO_test.cc encap.cc WOO-client.cc
> MODE            = l4linux
> 
> include $(L4DIR)/mk/prog.mk
> 
> ###########################################
> 
> but the files are in c++. They compile right but when the link the give 
> the following error:
> 
> ###################################################
> 
>   ==> Linking WOO_test
> LD_PRELOAD=/home/tiago/l4/tool/gendep/libgendep.so 
> GENDEP_TARGET=WOO_test GENDEP_BINARY=ld  gcc -o WOO_test  WOO_test.o 
> encap.o WOO-client.o   -L../../../../../lib/x86_586/l4v2 


> what do i need to link to use c++ in l4linux? i can not link stdlibc++ 
> because it's not intended to use in L4linux...
> the lack of __gxx_personality_v0 is not due to linking with gcc because 
> i link my server with gcc... and i use c++.
> How can i make this link with the correct c++ stdlib?

Simple answer, that's a bug in the build system. It is using gcc for
linking (see above) which is wrong for c++ as they need some libs that
gcc does not consider. The following should work:

Index: mk/prog.mk
===================================================================
RCS file: /home/cvs/l4/mk/prog.mk,v
retrieving revision 1.19
diff -u -r1.19 prog.mk
--- mk/prog.mk	11 Oct 2004 12:12:28 -0000	1.19
+++ mk/prog.mk	18 May 2005 21:01:36 -0000
@@ -95,9 +95,15 @@
 
 DEPS	+= $(foreach file,$(TARGET), $(dir $(file)).$(notdir $(file)).d)
 
+# Link C++ programs with g++ (esp. in l4linux mode)
+LINK_PROGRAM := $(CC)
+ifneq ($(SRC_CC),)
+LINK_PROGRAM := $(CXX)
+endif
+
 $(TARGET): $(OBJS) $(LIBDEPS) $(CRT0) $(CRTN)
 	@$(LINK_MESSAGE)
-	$(VERBOSE)$(call MAKEDEP,$(INT_LD_NAME)) $(CC) -o $@ $(CRT0) $(OBJS) $(LDFLAGS) $(CRTN)
+	$(VERBOSE)$(call MAKEDEP,$(INT_LD_NAME)) $(LINK_PROGRAM) -o $@ $(CRT0) $(OBJS) $(LDFLAGS) $(CRTN)
 	@$(BUILT_MESSAGE)
 
 endif	# architecture is defined, really build




Adam
-- 
Adam                 adam at os.inf.tu-dresden.de
  Lackorzynski         http://os.inf.tu-dresden.de/~adam/