[Bug ld/815] New: [C-api -> C++ lib] undefined symbol _Unwind* http://sources.redhat.com/bugzilla/enter_bug.cgi

[pluto at pld-linux dot org]

# cat foo.h  
struct foo { bool check() const; };  
  
# cat foo.cpp  
#include "foo.h"  
bool foo::check() const { return true; }  
  
# cat foo-c.cpp  
#include "foo.h"  
extern "C" int foo_check(const foo* obj) { return obj->check(); } 
 
# build 
g++ -O2 foo.cpp -o libfoo.so -shared 
g++ -O2 foo-c.cpp -o libfoo-c.so -shared -L. -lfoo 
# link test 
gcc libfoo.so 
LD_LIBRARY_PATH=./ gcc libfoo-c.so 
 
# with binutils-2.15.94* it works fine 
 
2x: 
 
/usr/lib/gcc/i686-pld-linux/4.0.0/../../../crt1.o(.text+0x18): 
In function `_start': init.c: undefined reference to `main' 
collect2: ld returned 1 exit status 
 
# LD_LIBRARY_PATH=. ldd libfoo*.so 
libfoo-c.so: 
        linux-gate.so.1 =>  (0xffffe000) 
        libfoo.so => ./libfoo.so (0x40002000) 
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x40004000) 
        libm.so.6 => /lib/libm.so.6 (0x400d4000) 
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x400f8000) 
        libc.so.6 => /lib/libc.so.6 (0x40103000) 
        /lib/ld-linux.so.2 (0x80000000) 
libfoo.so: 
        linux-gate.so.1 =>  (0xffffe000) 
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x40002000) 
        libm.so.6 => /lib/libm.so.6 (0x400d2000) 
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x400f6000) 
        libc.so.6 => /lib/libc.so.6 (0x40101000) 
        /lib/ld-linux.so.2 (0x80000000) 
 
# with binutils snapshot it doesn't work 
(ftp://sources.redhat.com/pub/binutils/snapshots2.15.96) 
 
2x: 
 
/usr/lib/gcc/i686-pld-linux/4.0.0/../../../crt1.o: 
In function `_start': 
init.c:(.text+0x18): undefined reference to `main' 
/usr/bin/../lib/libstdc++.so.6: 
undefined reference to address@hidden' 
/usr/bin/../lib/libstdc++.so.6: 
undefined reference to address@hidden' 
/usr/bin/../lib/libstdc++.so.6: 
undefined reference to address@hidden' 
/usr/bin/../lib/libstdc++.so.6: 
undefined reference to address@hidden' 
/usr/bin/../lib/libstdc++.so.6: 
undefined reference to address@hidden' 
/usr/bin/../lib/libstdc++.so.6: 
undefined reference to address@hidden' 
/usr/bin/../lib/libstdc++.so.6: 
undefined reference to address@hidden' 
/usr/bin/../lib/libstdc++.so.6: 
undefined reference to address@hidden' 
/usr/bin/../lib/libstdc++.so.6: 
undefined reference to address@hidden' 
/usr/bin/../lib/libstdc++.so.6: 
undefined reference to address@hidden' 
/usr/bin/../lib/libstdc++.so.6: 
undefined reference to address@hidden' 
collect2: ld returned 1 exit status 
 
# LD_LIBRARY_PATH=. ldd libfoo*.so 
libfoo-c.so: 
        linux-gate.so.1 =>  (0xffffe000) 
        libfoo.so => ./libfoo.so (0x40002000) 
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x40004000) 
        libm.so.6 => /lib/libm.so.6 (0x400d4000) 
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x400f8000) 
        libc.so.6 => /lib/libc.so.6 (0x40103000) 
        /lib/ld-linux.so.2 (0x80000000) 
libfoo.so: 
        linux-gate.so.1 =>  (0xffffe000) 
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x40002000) 
        libm.so.6 => /lib/libm.so.6 (0x400d2000) 
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x400f6000) 
        libc.so.6 => /lib/libc.so.6 (0x40101000) 
        /lib/ld-linux.so.2 (0x80000000) 
 
Do I need add the -lstdc++ to link similiar C-apis now?

-- 
           Summary: [C-api -> C++ lib] undefined symbol _Unwind*
                    http://sources.redhat.com/bugzilla/enter_bug.cgi
           Product: binutils
           Version: 2.15
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: pluto at pld-linux dot org
                CC: bug-binutils at gnu dot org
 GCC build triplet: i686-pld-linux
  GCC host triplet: i686-pld-linux
GCC target triplet: i686-pld-linux


http://sources.redhat.com/bugzilla/show_bug.cgi?id=815

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