[csw-maintainers] Need help on C++ linker issue

[Rafael Ostertag]

Hi Dago

On Tue, Dec 13, 2011 at 11:13:27AM +0100, Dagobert Michelsen wrote:
> Hi folks,
> 
> in my effort to build imagemagick 64 bit I encountered a problem with the latest
> libfpx, where I get unresolved symbols. When look at the methods I see a function
> with a different mangled name, which has however the same unmangled signature.
> It would be cool if someone with more expertise on C++ could lend me a hand in
> this, everything is checked in GAR in pkg/libfpx/trunk:
> 
> unstable9s% ldd -r work/solaris9-sparc/pkgroot/opt/csw/lib/libfpx.so | c++filt 
>         /usr/lib/secure/s9_preload.so.1
>         libCrun.so.1 =>  /usr/lib/libCrun.so.1
>         libm.so.1 =>     /usr/lib/libm.so.1
>         libc.so.1 =>     /usr/lib/libc.so.1
>         libdl.so.1 =>    /usr/lib/libdl.so.1
>         /usr/platform/SUNW,SPARC-Enterprise-T5220/lib/libc_psr.so.1
>         symbol not found: int CExposedDocFile::RenameElement(const char*,const char*)           (work/solaris9-sparc/pkgroot/opt/csw/lib/libfpx.so)
>         symbol not found: int CExposedDocFile::RenameElement(const char*,const char*)           (work/solaris9-sparc/pkgroot/opt/csw/lib/libfpx.so)
>         symbol not found: unsigned char OLEHeaderStream::Seek(const long,const unsigned long)           (work/solaris9-sparc/pkgroot/opt/csw/lib/libfpx.so)
>         symbol not found: std::ostream &std::ostream::write(const char*,long)           (work/solaris9-sparc/pkgroot/opt/csw/lib/libfpx.so)
>         symbol not found: std::ostream &std::ostream::put(char)         (work/solaris9-sparc/pkgroot/opt/csw/lib/libfpx.so)
> 

I submitted two patches to libfpx which sould get rid of the ::RenameElement()
and ::Seek() symbols not being found:

unstable9s$ ldd -r work/solaris9-sparc/pkgroot/opt/csw/lib/libfpx.so | c++filt
        /usr/lib/secure/s9_preload.so.1
        libCrun.so.1 =>  /usr/lib/libCrun.so.1
        libm.so.1 =>     /usr/lib/libm.so.1
        libc.so.1 =>     /usr/lib/libc.so.1
        libdl.so.1 =>    /usr/lib/libdl.so.1
        /usr/platform/SUNW,SPARC-Enterprise-T5220/lib/libc_psr.so.1
        symbol not found: std::ostream &std::ostream::write(const char*,long)           (work/solaris9-sparc/pkgroot/opt/csw/lib/libfpx.so)
        symbol not found: std::ostream &std::ostream::put(char)         (work/solaris9-sparc/pkgroot/opt/csw/lib/libfpx.so)

However, the std::ostream:write() and ::put() symbols appear to be more
serious. I guess they are caused by a combination of -D_RWSTD_NO_WSTR=1 and the
way libfpx handles wchar. The file oless/h/owchar.h states following:

//  Note:        These routines uses WCHAR which is unsigned short (2 bytes)
//               They are not compatible with some systems that uses 4 bytes
/                wide characters

and it appears Solaris is using 4 bytes (sizeof(wchar_t)==4). This might explain why one
has to use -D_RWSTD_NO_WSTR=1 in the first place. I might add, that I did not
spend a great deal of time hunting down the ostream issue, so my conjecture
might be off by miles.

Hope this helps.

Cheers
rafi