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Re: [reSIProcate] building shared libraries on AMD64

From: Byron Campen <bcampen@xxxxxxxxxxxx>
Date: Fri, 22 Sep 2006 16:09:40 -0500

        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 -undefinedsuppress -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 willrequire .dylib support from the build system)
Best regards,
Byron Campen
Hrm, looks like the object files need to be compiled with -fPICtoo. 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.soobj.debug.Linux.x86_64/AbstractFifo.o obj.debug.Linux.x86_64/BaseException.o obj.debug.Linux.x86_64/Coders.oobj.debug.Linux.x86_64/Condition.o obj.debug.Linux.x86_64/CountStream.o obj.debug.Linux.x86_64/Data.oobj.debug.Linux.x86_64/DataStream.o obj.debug.Linux.x86_64/DnsUtil.o obj.debug.Linux.x86_64/FileSystem.oobj.debug.Linux.x86_64/HeapInstanceCounter.oobj.debug.Linux.x86_64/Lock.o obj.debug.Linux.x86_64/Log.oobj.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.oobj.debug.Linux.x86_64/Poll.o obj.debug.Linux.x86_64/RWMutex.oobj.debug.Linux.x86_64/Random.o obj.debug.Linux.x86_64/RecursiveMutex.o obj.debug.Linux.x86_64/SelectInterruptor.oobj.debug.Linux.x86_64/SHA1Stream.o obj.debug.Linux.x86_64/Socket.o obj.debug.Linux.x86_64/Subsystem.oobj.debug.Linux.x86_64/SysLogBuf.o obj.debug.Linux.x86_64/SysLogStream.o obj.debug.Linux.x86_64/ThreadIf.oobj.debug.Linux.x86_64/Timer.o obj.debug.Linux.x86_64/vmd5.oobj.debug.Linux.x86_64/dns/AresDns.o obj.debug.Linux.x86_64/dns/DnsAAAARecord.o obj.debug.Linux.x86_64/dns/DnsCnameRecord.oobj.debug.Linux.x86_64/dns/DnsHostRecord.o obj.debug.Linux.x86_64/dns/DnsNaptrRecord.o obj.debug.Linux.x86_64/dns/DnsSrvRecord.oobj.debug.Linux.x86_64/dns/DnsStub.o obj.debug.Linux.x86_64/dns/ExternalDnsFactory.o obj.debug.Linux.x86_64/dns/RRCache.oobj.debug.Linux.x86_64/dns/RRList.o obj.debug.Linux.x86_64/dns/RRVip.o obj.debug.Linux.x86_64/dns/QueryTypes.oobj.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: relocationR_X86_64_32 against `a local symbol' can not be used when makinga shared object; recompile with -fPICobj.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 tohandle 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 bebuilt
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


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