gdc compiler/linker error

[Tower Ty]

Jason House Wrote:

> Jonathan Crapuchettes wrote:
> 
> > I am getting a linker error when I try to compile my code as follows:
> > 
> > jonathan at blackbeard:~/workspace/ccb/matrix$ gdmd test.d Matrix.d Vector.d
> > Util.d ../MySQLConnection.d -unittest -I../..
> > -L/usr/lib/atlas/libptcblas.a -L/usr/lib/atlas/liblapack.a
> > -L/usr/lib/atlas/libatlas.a -L/usr/lib/atlas/libcblas.a
> > -L/usr/lib/atlas/libblas.a -L/usr/lib/libmysqlclient.so -vdmd
> > /usr/bin/gdc -funittest -I ../.. -c test.d -o test.o
> > /usr/bin/gdc -funittest -I ../.. -c Matrix.d -o Matrix.o
> > /usr/bin/gdc -funittest -I ../.. -c Vector.d -o Vector.o
> > /usr/bin/gdc -funittest -I ../.. -c Util.d -o Util.o
> > /usr/bin/gdc -funittest -I ../.. -c ../MySQLConnection.d -o
> > MySQLConnection.o /usr/bin/gdc -funittest -I ../.. test.o Matrix.o
> > Vector.o Util.o MySQLConnection.o -Wl,/usr/lib/atlas/libptcblas.a
> > -Wl,/usr/lib/atlas/liblapack.a -Wl,/usr/lib/atlas/libatlas.a
> > -Wl,/usr/lib/atlas/libcblas.a -Wl,/usr/lib/atlas/libblas.a
> > -Wl,/usr/lib/libmysqlclient.so -o test Util.o: In function
> > `_D3ccb6matrix4Util11__unittest0FZv': Util.d:(.text+0x2ec4): undefined
> > reference to `_D3ccb15MySQLConnection15mysqlConnection7__ClassZ'
> > Util.d:(.text+0x2f22): undefined reference to
> >
> `_D3ccb15MySQLConnection15mysqlConnection5_ctorMFAaAaAaAaZC3ccb15MySQLConnection15mysqlConnection'
> > collect2: ld returned 1 exit status
> > 
> > I am trying to use gdc for its 64-bit compilation, but this is a problem.
> > I checked the compiled code inside MySQLConnection.o with objdump and
> > found that _D3ccb15MySQLConnection15MysqlConnection7__ClassZ exists. The
> > only different between this label and the one that is causing the error is
> > the m in the last term. The name of the class is MysqlConnection.
> > 
> > I am using gdc (GCC) 4.1.3 20070831 (prerelease gdc 0.25, using dmd 1.021)
> > (Ubuntu 0.25-4.1.2-16ubuntu1).
> > 
> > What can I do to get this is compile and link?
> > 
> > Thank you taking to read this,
> > JC
> 
> If you pick up a d demangler and run it on the output, it'll make it easier
> for others to interpret.  It may even have the unexpected side effect of
> making the error obvious.

If hes using tango then there isn't one I don't think
Phobos has one for use in Linux
This question is in the ".D" forum also and I passed on it in case I lower your chances of an answer, however I'd suggest that somewhere in 
reference to `_D3ccb15MySQLConnection15mysqlConnection7__ClassZ'  and
`_D3ccb15MySQLConnection15mysqlConnection5_ctorMFAaAaAaAaZC3ccb15MySQLConnection15mysqlConnection'

is a clue . I would be looking  for "MySQLConnection.mysqlConnection"  typed somewhere instead of "MySQLConnection.MysqlConnection"  You are right about the m I think

Anyway some much smarter people on here will hopefuly read the output and be able to interpret it clearly for you