Problem building Ada examples

[Joel Sherrill <joel@OARcorp.com>]

Frédéric PRACA wrote:
> Hello,
> I'm interested in using Rtems with Ada but I have a problem with the provided
> examples.
> I have two questions :
> - what is the linkcmds file ? Do I have to tweak it ?
> - Using the linkcmds I found in RTEMS_MAKEFILE_PATH/lib/, I get the following
> error :
> 
> fred at coruscant:~/Dev/RealTime/ada-examples-4.6.5/hello_world_ada>gmake -f
> Makefile.pc386
> /home/fred/Dev/Audiome/crossCompiler/binaries/bin/i386-rtems-gnatmake -v -O
> -gnata -gnatE -gnato hello -g -o hello.obj \
>     -bargs -Mgnat_main \
>     -cargs -B/home/fred/Dev/RealTime/rtemsInstall/i386-rtems/pc386/lib/ -specs
> /home/fred/Dev/RealTime/rtemsInstall/i386-rtems/pc686/lib/bsp_specs -qrtems
> -Wl,-Ttext,0x00100000  \
>     -largs -B/home/fred/Dev/RealTime/rtemsInstall/i386-rtems/pc386/lib/ -specs
> /home/fred/Dev/RealTime/rtemsInstall/i386-rtems/pc686/lib/bsp_specs -qrtems
> -Wl,-Ttext,0x00100000  init.o
> 
> GNATMAKE 4.0.2
> Copyright 1995-2004 Free Software Foundation, Inc.
>   -> "hello.obj" final executable
>   "hello.ali" being checked ...
> End of compilation
>   "hello.obj" missing.
> i386-rtems-gnatbind -aO./ -Mgnat_main -I- -x hello.ali
> i386-rtems-gnatlink hello.ali -g -o hello.obj
> -B/home/fred/Dev/RealTime/rtemsInstall/i386-rtems/pc386/lib/ -specs
> /home/fred/Dev/RealTime/rtemsInstall/i386-rtems/pc686/lib/bsp_specs -qrtems
> -Wl,-Ttext,0x00100000 init.o
> /home/fred/Dev/Audiome/crossCompiler/binaries/lib/gcc/i386-rtems/4.0.2/../../../../i386-rtems/bin/ld:
> start.o: pas de fichier tel: No such file or directory

If memory serves, there should be a start.o in the same directory as the 
bsp_specs and the above linker options are sufficient to find it.  Is it 
there?

> collect2: ld returned 1 exit status
> i386-rtems-gnatlink: cannot call
> /home/fred/Dev/Audiome/crossCompiler/binaries/bin/i386-rtems-gcc
> i386-rtems-gnatmake: *** link failed.
> gmake: *** [hello.exe] Erreur 4
> 
> Why does ld look for start.o ????

Every program needs start.o which is traditionally known as crt0.o.  It 
initializes the stack, etc.

> Thanks for help.
> 
> Fred


-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel at OARcorp.com                 On-Line Applications Research
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