[reSIProcate] building shared libraries on AMD64
Byron Campen
bcampen at estacado.net
Fri Sep 22 16:49:30 CDT 2006
Ok, the problem seems to be that, when we convince the build system
to start compiling object files with -fPIC, there seems to be no way
to convince it to NOT use -fPIC when compiling an object file for an
executable. (The build system builds all *.o in exactly the same
manner) Compiling the object file for an executable with -fPIC just
doesn't work. It looks to me like fixing this will require invasive
changes to the build system, and I don't think this will be
manageable by the RC4 drop in the next 20 minutes or so.
Jason, do you have any ideas?
Best regards,
Byron Campen
> This slightly beefier patch seems to be working so far for me.
>
> Index: build/Makefile.post
> ===================================================================
> --- build/Makefile.post (revision 6598)
> +++ build/Makefile.post (working copy)
> @@ -83,7 +83,13 @@
> DEPEND_TARGETS += $(foreach pkg,$(PACKAGES), $($(pkg)_TARGETS))
> ifeq ($(BUILD_SHARED_LIBS),yes)
> +
> +ifeq ($(OSTYPE),Darwin)
> +.dependlibs: $(patsubst %.a,%.dylib,$(DEPEND_FILES))
> +else
> .dependlibs: $(patsubst %.a,%.so,$(DEPEND_FILES))
> +endif
> +
> else
> .dependlibs: $(DEPEND_FILES)
> endif
> @@ -111,7 +117,12 @@
> HWOBJS = $(patsubst %.cpp,$(OBJ)/%.o,$(patsubst %.c,$(OBJ)/%.o,$
> (patsubst %.cxx,$(OBJ)/%.o,$(HWSRC))))
> DEPENDENCIES = $(patsubst %.cpp,$(OBJ)/%.d,$(patsubst %.c,$(OBJ)/
> %.d,$(patsubst %.cxx,$(OBJ)/%.d,$(ALLSRC))))
> +ifeq ($(OSTYPE),Darwin)
> +SHARED_LIB = $(patsubst %,$(OBJ)/%.dylib,$(strip $(TARGET_LIBRARY)))
> +else
> SHARED_LIB = $(patsubst %,$(OBJ)/%.so,$(strip $(TARGET_LIBRARY)))
> +endif
> +
> STATIC_LIB = $(patsubst %,$(OBJ)/%.a,$(strip $(TARGET_LIBRARY)))
> ifeq ($(BUILD_SHARED_LIBS),yes)
> @@ -293,6 +304,12 @@
> $(MKSHLIB) -o $@ $^
> -@ mkdir -p $(ROOT)/lib.$(TARGET_NAME)
> @ test -h $(ROOT)/lib.$(TARGET_NAME)/$(strip $
> (TARGET_LIBRARY)).so || ln -s $(shell pwd)/$@ $(ROOT)/lib.$
> (TARGET_NAME)
> +
> +$(OBJ)/$(strip $(TARGET_LIBRARY)).dylib: $(OBJS) $(OTHERLIBS)
> + -@ test -f $@ && /bin/rm $@
> + $(MKSHLIB) -o $@ $^
> + -@ mkdir -p $(ROOT)/lib.$(TARGET_NAME)
> + @ test -h $(ROOT)/lib.$(TARGET_NAME)/$(strip $
> (TARGET_LIBRARY)).dylib || ln -s $(shell pwd)/$@ $(ROOT)/lib.$
> (TARGET_NAME)
> endif
> ifdef TARGET_BINARY
> Index: build/Makefile.tools
> ===================================================================
> --- build/Makefile.tools (revision 6598)
> +++ build/Makefile.tools (working copy)
> @@ -31,7 +31,14 @@
> CC = gcc
> CXX = g++
> -MKSHLIB := $(CC) -fPIC -shared
> +
> +ifeq ($(OSTYPE),Darwin)
> +MKSHLIB := $(CC) -fPIC -flat_namespace -undefined
> suppress -dynamic -dynamic-lib
> +LDFLAGS += -flat_namespace
> +else
> +MKSHLIB := $(CC) -fPIC -shared
> +endif
> +
> DEP := $(CXX)
> LINKER := $(CXX)
> RANLIB = ranlib
> @@ -43,6 +50,12 @@
> LNDIR = $(shell pwd)/$(ROOT)/build/lndir.sh
> CFLAGS += -Wall
> CXXFLAGS += -Wall
> +
> +ifeq ($(BUILD_SHARED_LIBS),yes)
> +CFLAGS += -fPIC
> +CXXFLAGS += -fPIC
> +endif
> +
> DFLAG_INTEGRATED = -MMD
> DEBUG_FLAG = -g
> COMPILE_SMALL_FLAG = -Os -fno-inline -fno-keep-static-consts
>
> Best regards,
> Byron Campen
>
>
>> Well, this appears to break the shared library build on OS X.
>> (Missing libstdc++ symbols) I am trying to fix this. (This will
>> require .dylib support from the build system)
>>
>> Best regards,
>> Byron Campen
>>
>>> Hrm, looks like the object files need to be compiled with -fPIC
>>> too. I will try the following slightly different patch:
>>>
>>> Index: build/Makefile.tools
>>> ===================================================================
>>> --- build/Makefile.tools (revision 6598)
>>> +++ build/Makefile.tools (working copy)
>>> @@ -43,6 +43,12 @@
>>> LNDIR = $(shell pwd)/$(ROOT)/build/lndir.sh
>>> CFLAGS += -Wall
>>> CXXFLAGS += -Wall
>>> +
>>> +ifeq ($(BUILD_SHARED_LIBS),yes)
>>> +CFLAGS += -fPIC
>>> +CXXFLAGS += -fPIC
>>> +endif
>>> +
>>> DFLAG_INTEGRATED = -MMD
>>> DEBUG_FLAG = -g
>>> COMPILE_SMALL_FLAG = -Os -fno-inline -fno-keep-static-consts
>>>
>>> Best regards,
>>> Byron Campen
>>>
>>>
>>>> hi Byron
>>>>
>>>> here is the error when building rutil shared:
>>>>
>>>>
>>>> gcc -fPIC -shared -o obj.debug.Linux.x86_64/librutil.so
>>>> obj.debug.Linux.x86_64/AbstractFifo.o obj.debug.Linux.x86_64/
>>>> BaseException.o obj.debug.Linux.x86_64/Coders.o
>>>> obj.debug.Linux.x86_64/Condition.o obj.debug.Linux.x86_64/
>>>> CountStream.o obj.debug.Linux.x86_64/Data.o
>>>> obj.debug.Linux.x86_64/DataStream.o obj.debug.Linux.x86_64/
>>>> DnsUtil.o obj.debug.Linux.x86_64/FileSystem.o
>>>> obj.debug.Linux.x86_64/HeapInstanceCounter.o
>>>> obj.debug.Linux.x86_64/Lock.o obj.debug.Linux.x86_64/Log.o
>>>> obj.debug.Linux.x86_64/Logger.o obj.debug.Linux.x86_64/
>>>> MD5Stream.o obj.debug.Linux.x86_64/Mutex.o
>>>> obj.debug.Linux.x86_64/OpenSSLInit.o obj.debug.Linux.x86_64/
>>>> ParseBuffer.o obj.debug.Linux.x86_64/Poll.o
>>>> obj.debug.Linux.x86_64/RWMutex.o obj.debug.Linux.x86_64/Random.o
>>>> obj.debug.Linux.x86_64/RecursiveMutex.o obj.debug.Linux.x86_64/
>>>> SelectInterruptor.o obj.debug.Linux.x86_64/SHA1Stream.o
>>>> obj.debug.Linux.x86_64/Socket.o obj.debug.Linux.x86_64/
>>>> Subsystem.o obj.debug.Linux.x86_64/SysLogBuf.o
>>>> obj.debug.Linux.x86_64/SysLogStream.o obj.debug.Linux.x86_64/
>>>> ThreadIf.o obj.debug.Linux.x86_64/Timer.o obj.debug.Linux.x86_64/
>>>> vmd5.o obj.debug.Linux.x86_64/dns/AresDns.o
>>>> obj.debug.Linux.x86_64/dns/DnsAAAARecord.o
>>>> obj.debug.Linux.x86_64/dns/DnsCnameRecord.o
>>>> obj.debug.Linux.x86_64/dns/DnsHostRecord.o
>>>> obj.debug.Linux.x86_64/dns/DnsNaptrRecord.o
>>>> obj.debug.Linux.x86_64/dns/DnsSrvRecord.o obj.debug.Linux.x86_64/
>>>> dns/DnsStub.o obj.debug.Linux.x86_64/dns/ExternalDnsFactory.o
>>>> obj.debug.Linux.x86_64/dns/RRCache.o obj.debug.Linux.x86_64/dns/
>>>> RRList.o obj.debug.Linux.x86_64/dns/RRVip.o
>>>> obj.debug.Linux.x86_64/dns/QueryTypes.o obj.debug.Linux.x86_64/
>>>> dns/RROverlay.o obj.debug.Linux.x86_64/stun/Stun.o
>>>> obj.debug.Linux.x86_64/stun/Udp.o
>>>> /usr/bin/ld: obj.debug.Linux.x86_64/AbstractFifo.o: relocation
>>>> R_X86_64_32 against `a local symbol' can not be used when making
>>>> a shared object; recompile with -fPIC
>>>> obj.debug.Linux.x86_64/AbstractFifo.o: could not read symbols:
>>>> Bad value
>>>> collect2: ld returned 1 exit status
>>>> make: *** [obj.debug.Linux.x86_64/librutil.so] Error 1
>>>>
>>>>
>>>> the system is Ubuntu 6.06 AMD64, g++ v4.0.3
>>>>
>>>>
>>>> my fix was to add the -fPIC compile flag:
>>>> (you should verify if this is correct)
>>>>
>>>>
>>>> --- build/Makefile.tools (revision 6599)
>>>> +++ build/Makefile.tools (working copy)
>>>> @@ -41,8 +41,8 @@
>>>> DMANGLE =
>>>> INSTALL = install
>>>> LNDIR = $(shell pwd)/$(ROOT)/build/lndir.sh
>>>> -CFLAGS += -Wall
>>>> -CXXFLAGS += -Wall
>>>> +CFLAGS += -Wall -fPIC
>>>> +CXXFLAGS += -Wall -fPIC
>>>> DFLAG_INTEGRATED = -MMD
>>>> DEBUG_FLAG = -g
>>>> COMPILE_SMALL_FLAG = -Os -fno-inline -fno-keep-static-consts
>>>>
>>>>
>>>> /alfred
>>>>
>>>> Byron Campen wrote:
>>>>> I see some logic in the build system that was meant to
>>>>> handle this sort of thing, but it appears to not be working.
>>>>> Could you send the link-line?
>>>>> Best regards,
>>>>> Byron Campen
>>>>>> hi
>>>>>>
>>>>>> when building resiprocate with "Should the resip libraries be
>>>>>> built
>>>>>> shared?" set to "Yes", I got the following error:
>>>>>>
>>>>>>
>>>>>> /usr/bin/ld: obj.debug.Linux.x86_64/AbstractFifo.o: relocation
>>>>>> R_X86_64_32 against `a local symbol' can not be used when
>>>>>> making a
>>>>>> shared object; recompile with -fPIC
>>>>>> obj.debug.Linux.x86_64/AbstractFifo.o: could not read symbols:
>>>>>> Bad value
>>>>>> collect2: ld returned 1 exit status
>>>>>> make: *** [obj.debug.Linux.x86_64/librutil.so] Error 1
>>>>>>
>>>>>>
>>>>>> adding the "-fPIC" option solved the problem, but I am not
>>>>>> sure if
>>>>>> this is the correct way to solve it.. patch below:
>>>>>>
>>>>>>
>>>>>> Index: build/Makefile.tools
>>>>>> =================================================================
>>>>>> ==
>>>>>> --- build/Makefile.tools (revision 6553)
>>>>>> +++ build/Makefile.tools (working copy)
>>>>>> @@ -41,8 +41,8 @@
>>>>>> DMANGLE =
>>>>>> INSTALL = install
>>>>>> LNDIR = $(shell pwd)/$(ROOT)/build/lndir.sh
>>>>>> -CFLAGS += -Wall
>>>>>> -CXXFLAGS += -Wall
>>>>>> +CFLAGS += -Wall -fPIC
>>>>>> +CXXFLAGS += -Wall -fPIC
>>>>>> DFLAG_INTEGRATED = -MMD
>>>>>> DEBUG_FLAG = -g
>>>>>> COMPILE_SMALL_FLAG = -Os -fno-inline -fno-keep-static-consts
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> resiprocate-devel mailing list
>>>>>> resiprocate-devel at list.sipfoundry.org
>>>>>> https://list.sipfoundry.org/mailman/listinfo/resiprocate-devel
>>>>
>>>
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>>
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>
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