middle-end/9152: Undefined virtual thunks

Mon Mar 17 09:56:00 GMT 2003

The following reply was made to PR c++/9152; it has been noted by GNATS.

From: John Sturton <john.sturton@sescoi.fr>
To: bangerth@dealii.org, gcc-bugs@gcc.gnu.org,
 	gcc-prs@gcc.gnu.org, john.sturton@sescoi.fr, nobody@gcc.gnu.org,
 	gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: middle-end/9152: Undefined virtual thunks
Date: Mon, 17 Mar 2003 10:52:00 +0100

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 bangerth@dealii.org wrote:
 > 
 > Synopsis: Undefined virtual thunks
 > 
 > State-Changed-From-To: open->feedback
 > State-Changed-By: bangerth
 > State-Changed-When: Sat Mar 15 03:42:57 2003
 > State-Changed-Why:
 >     Hm, I cannot reproduce this with 3.2, 3.2.2, or any newer
 >     version of gcc. Can you possibly check and see whether this
 >     behavior still persists on your system?
 > 
 >     Thanks
 >       Wolfgang
 > 
 > http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9152

 Hi,

 Yes, I still have the problem with my 3.2 Mandrake installation. I have
 re-attached the output from the compilation. Is there anything else I
 can provide?

 Cheers,

 John Sturton
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  name="gbug.log2"
 Content-Disposition: inline;
  filename="gbug.log2"

 class CPureVirtualBase1 {
 public:
   CPureVirtualBase1(void);
   virtual ~CPureVirtualBase1(void);
   virtual void Import(void)=0;
   virtual void Export(void) const =0;
 }; // CPureVirtualBase1

 #define DECLARE_CLASS(_className)\
 {\
 public:\
   _className(void);\
   virtual ~_className(void);\
   virtual void Import(void);\
   virtual void Export(void) const;\
 };

 class CBase2 : virtual public CPureVirtualBase1
 DECLARE_CLASS(CBase2)

 class CBase3 : virtual public CPureVirtualBase1, public CBase2
 DECLARE_CLASS(CBase3)

 class CBase4 : virtual public CPureVirtualBase1
 DECLARE_CLASS(CBase4)

 class CBase5 : public CBase4, public CBase3
 DECLARE_CLASS(CBase5)

 CPureVirtualBase1::CPureVirtualBase1(void)
 {
 } // CPureVirtualBase1::CPureVirtualBase1

 CPureVirtualBase1::~CPureVirtualBase1(void)
 {
 } // CPureVirtualBase1::~CPureVirtualBase1

 #define DEFINE_CLASS(_className) \
 _className::_className(void) {}\
 _className::~_className(void) {}\
 void _className::Import(void) {}\
 void _className::Export(void) const {}

 DEFINE_CLASS(CBase2)
 DEFINE_CLASS(CBase3)
 DEFINE_CLASS(CBase4)
 DEFINE_CLASS(CBase5)

 int main(void)
 {
   return 0;
 } // main

 pc-linux1[john]:/serv1-3/save/john/dev/14/gcc *14*> g++ gbug.cpp -v
 Reading specs from /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2/specs
 Configured with: ../configure --prefix=/usr --libdir=/usr/lib --with-slibdir=/lib --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --enable-long-long --enable-__cxa_atexit --enable-languages=c,c++,ada,f77,objc,java --host=i586-mandrake-linux-gnu --with-system-zlib
 Thread model: posix
 gcc version 3.2 (Mandrake Linux 9.0 3.2-1mdk)
  /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2/cc1plus -v -D__GNUC__=3 -D__GNUC_MINOR__=2 -D__GNUC_PATCHLEVEL__=0 -D__GXX_ABI_VERSION=102 -D__ELF__ -Dunix -D__gnu_linux__ -Dlinux -D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i586__ -D__tune_pentium__ gbug.cpp -D__GNUG__=3 -D__DEPRECATED -D__EXCEPTIONS -quiet -dumpbase gbug.cpp -version -o /usr4/john/tmp/ccWkFMi e.s
 GNU CPP version 3.2 (Mandrake Linux 9.0 3.2-1mdk) (cpplib) (i386 Linux/ELF)
 GNU C++ version 3.2 (Mandrake Linux 9.0 3.2-1mdk) (i586-mandrake-linux-gnu)
         compiled by GNU C version 3.2 (Mandrake Linux 9.0 3.2-1mdk).
 ignoring nonexistent directory "/usr/i586-mandrake-linux-gnu/include"
 #include "..." search starts here:
 #include <...> search starts here:

  /usr/include/c++/3.2
  /usr/include/c++/3.2/i586-mandrake-linux-gnu
  /usr/include/c++/3.2/backward
  /usr/local/include
  /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2/include
  /usr/include
 End of search list.
  as -V -Qy -o /usr4/john/tmp/ccpgGezn.o /usr4/john/tmp/ccWkFMie.s
 GNU assembler version 2.12.90.0.15 (i586-mandrake-linux-gnu) using BFD version 2.12.90.0.15 20020717
  /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2/collect2 --eh-frame-hdr -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2/../../../crt1.o /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2/../../../crti.o /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2/crtbegin.o -L/usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2 -L/usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2/../../.. /usr4/john/tmp/ccpgGezn.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3 .2/crtend.o /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2/../../../crtn.o
 /usr4/john/tmp/ccpgGezn.o(.gnu.linkonce.d._ZTC6CBase54_6CBase3+0x3c): undefined reference to `virtual thunk [v:0,-12] to CBase3::~CBase3 [in-charge]()'
 /usr4/john/tmp/ccpgGezn.o(.gnu.linkonce.d._ZTC6CBase54_6CBase3+0x40): undefined reference to `virtual thunk [v:0,-12] to CBase3::~CBase3 [in-charge deleting]()'
 /usr4/john/tmp/ccpgGezn.o(.gnu.linkonce.d._ZTC6CBase54_6CBase3+0x44): undefined reference to `virtual thunk [v:0,-16] to CBase3::Import()'
 /usr4/john/tmp/ccpgGezn.o(.gnu.linkonce.d._ZTC6CBase54_6CBase3+0x48): undefined reference to `virtual thunk [v:0,-20] to CBase3::Export() const'
 collect2: ld returned 1 exit status

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