# 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 [EMAIL PROTECTED]'
/usr/bin/../lib/libstdc++.so.6:
undefined reference to [EMAIL PROTECTED]'
/usr/bin/../lib/libstdc++.so.6:
undefined reference to [EMAIL PROTECTED]'
/usr/bin/../lib/libstdc++.so.6:
undefined reference to [EMAIL PROTECTED]'
/usr/bin/../lib/libstdc++.so.6:
undefined reference to [EMAIL PROTECTED]'
/usr/bin/../lib/libstdc++.so.6:
undefined reference to [EMAIL PROTECTED]'
/usr/bin/../lib/libstdc++.so.6:
undefined reference to [EMAIL PROTECTED]'
/usr/bin/../lib/libstdc++.so.6:
undefined reference to [EMAIL PROTECTED]'
/usr/bin/../lib/libstdc++.so.6:
undefined reference to [EMAIL PROTECTED]'
/usr/bin/../lib/libstdc++.so.6:
undefined reference to [EMAIL PROTECTED]'
/usr/bin/../lib/libstdc++.so.6:
undefined reference to [EMAIL PROTECTED]'
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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