Hi. I am a beginner with D and implemented a solver for SUDOKU puzzles using DMD and Tango.

When I try to compile the code with rebuild using the following command:

rebuild src/evanescent/apps/sudoku/core/CommandLineInterface.d -O -release -inline -Isrc/ -I../../deescover/src/ -ofbin/sudoku-solver -clean

then I get the following errors by the linker that basically tell me nothing:

/usr/lib/d/libtango-base-dmd.a(deh2.o): In function `_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable':
(.text._D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x9): undefined reference to `_deh_beg'
/usr/lib/d/libtango-base-dmd.a(deh2.o): In function `_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable':
(.text._D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0xe): undefined reference to `_deh_beg'
/usr/lib/d/libtango-base-dmd.a(deh2.o): In function `_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable':
(.text._D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x14): undefined reference to `_deh_end'
/usr/lib/d/libtango-base-dmd.a(deh2.o): In function `_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable':
(.text._D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x37): undefined reference to `_deh_end'
/usr/lib/d/libtango-base-dmd.a(dmain2.o): In function `_D6dmain24mainUiPPaZi7runMainMFZv':
(.text._D6dmain24mainUiPPaZi7runMainMFZv+0x10): undefined reference to `_Dmain'
collect2: ld returned 1 exit status
--- errorlevel 1



Does somebody know what the problem is (something with the Tango Lib include seems not working) and what I can do to resolve it?

Thanks a million in advance!
Uwe.

Uwe Keller Wrote:

> Hi. I am a beginner with D and implemented a solver for SUDOKU puzzles using DMD and Tango.
> 
> When I try to compile the code with rebuild using the following command:
> 
> rebuild src/evanescent/apps/sudoku/core/CommandLineInterface.d -O -release -inline -Isrc/ -I../../deescover/src/ -ofbin/sudoku-solver -clean
> 
> then I get the following errors by the linker that basically tell me nothing:
> 
> /usr/lib/d/libtango-base-dmd.a(deh2.o): In function `_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable':
> (.text._D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x9): undefined reference to `_deh_beg'
> /usr/lib/d/libtango-base-dmd.a(deh2.o): In function `_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable':
> (.text._D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0xe): undefined reference to `_deh_beg'
> /usr/lib/d/libtango-base-dmd.a(deh2.o): In function `_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable':
> (.text._D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x14): undefined reference to `_deh_end'
> /usr/lib/d/libtango-base-dmd.a(deh2.o): In function `_D4deh213__eh_finddataFPvZPS4deh213DHandlerTable':
> (.text._D4deh213__eh_finddataFPvZPS4deh213DHandlerTable+0x37): undefined reference to `_deh_end'
> /usr/lib/d/libtango-base-dmd.a(dmain2.o): In function `_D6dmain24mainUiPPaZi7runMainMFZv':
> (.text._D6dmain24mainUiPPaZi7runMainMFZv+0x10): undefined reference to `_Dmain'
> collect2: ld returned 1 exit status
> --- errorlevel 1
> 
> 
> 
> Does somebody know what the problem is (something with the Tango Lib include seems not working) and what I can do to resolve it?
> 
> Thanks a million in advance!
> Uwe.
> 
> 

Ok, I found the problem myself. Stupid mistake that I did not see since I mostly developed in Java so far.

The problem was that I put the main method in the CommandLineInterface module into a class description called CommandLineInterface. Hence the linker could not find the definition of "main" in the CommandLIneInterfaceModule.

The error had nothing to do with Tango.

Sorry!