Re: Question about GNAT gprconfig

[Zack Boll <zackboll@gmail.com>]

On Sunday, March 6, 2016 at 7:11:49 PM UTC-5, Zack Boll wrote:
> On Sunday, March 6, 2016 at 5:26:20 PM UTC-5, Zack Boll wrote:
> > On Sunday, March 6, 2016 at 6:17:17 AM UTC-5, Simon Wright wrote:
> > > Zack Boll <zackboll@gmail.com> writes:
> > > 
> > > > I recently built a GCC Ada cross-compiler for the PowerPC64
> > > > architecture using crosstool-ng.  I can compile my Ada programs fine
> > > > using powerpc64-e6500-linux-gnu-gnatmake but I have been unable to
> > > > build with gprbuild and appropriate project files.  I have traced this
> > > > down to an issue with gprconfig not recognizing my compiler.
> > > >
> > > > When I run gprconfig --show-targets
> > > > I get:
> > > > arm-linux-gnueabihf (Raspberry Pi2 Cross Compiler downloaded from
> > > > Adacores website)
> > > > x86_64-linux-gnu
> > > >
> > > > But I don't see powerpc64-e6500-linux-gnu even though the compiler
> > > > executable is in my path.  Does anyone know what the issue might be?
> > > 
> > > I think that gprconfig's compiler description file (at
> > > $prefix/share/gprconfig/compilers.xml) doesn't recognise your target.
> > > 
> > > You could edit that file directly; might be better to start by writing a
> > > description just for your compiler, starting just from the GNAT section
> > > at about line 687,
> > > 
> > > <?xml version="1.0" ?>
> > > <gprconfig>
> > >   <compiler_description>
> > >     <name>GNAT-PPC64</name>
> > >     <executable prefix="1">(powerpc64-e6500-linux-gnu-)?gnatmake</executable>
> > >     <version>
> > >       <external>${PREFIX}gnatls -v --version</external>
> > >       <grep regexp="^GNATLS.+?(\d+(\.\d+)?)" group="1"></grep>
> > >     </version>
> > >     <languages>Ada</languages>
> > >     <variable name="gcc_version">
> > >       <external>${PREFIX}gcc -v</external>
> > >       <grep regexp="^[-\w]*gcc \S+ (\S+)" group="1"></grep>
> > >     </variable>
> > >     <runtimes default="default,kernel,native">
> > >        <directory group="default" >\.\./lib/gcc(-lib)?/$TARGET/$gcc_version/adalib/</directory>
> > >        <directory group="default" contents="^rts-">\.\./lib/gcc(-lib)?/$TARGET/$gcc_version/ada_object_path</directory>
> > >        <directory group="2" >\.\./lib/gcc(-lib)?/$TARGET/$gcc_version/rts-(.*)/adalib/</directory>
> > >        <directory group="1" >\.\./$TARGET/lib/gnat/(.*)/adalib/</directory>
> > >     </runtimes>
> > >     <target>
> > >       <external>${PREFIX}gcc -dumpmachine</external>
> > >       <grep regexp="[^\r\n]+"></grep>
> > >     </target>
> > >   </compiler_description>
> > > </gprconfig>
> > > 
> > > (not sure you need all of the <runtimes/> section) and put this in
> > > x-compilers.xml alongside the original compilers.xml (or locally, using
> > > the gprbuild --db switch).
> > > 
> > > You'll still need to specify --target=powerpc64-e6500-linux-gnu on the
> > > command line, or for Target use "powerpc64-e6500-linux-gnu"; in your
> > > GPR.
> > > 
> > > If this works, you'll probably want to add sections for C, C++, ASM.
> > 
> > Thanks, I was able to edit the existing GNAT line to support powerpc64-linux as a target.  Hopefully I will be able to get C and C++ building correctly with gprbuild.
> 
> I seem to be having trouble getting my hello world C++ program to compile with gprbuild.  I think it is trying to use the x86_64 version of "ar".  Below is my output from gprbuild with the "-v" flag.
> 
> gprbuild --target=powerpc64-e6500-linux-gnu -v -d -P/project/hello_world_cpp/hello_world_cpp.gpr -XADA_DIALECT=Ada_2012 -XARCHITECTURE=PowerPC64_Linux -XBUILD_FLAGS=Optimize -XELABORATION_CHECKS=Static -XCOMPILER_MULTIPROCESS=8 -XDEBUG_TARGET=local hello_world.cpp -s -j6
> GPRBUILD GPL 2015 (20150428) (x86_64-pc-linux-gnu)
> Copyright (C) 2004-2015, Free Software Foundation, Inc.
>  18 lines: No errors
> gprconfig --batch -o /project/hello_world_cpp/auto.cgpr --target=powerpc64-e6500-linux-gnu --config=c++,,,,powerpc64-e6500-linux-gnu-g++ --config=ada,,,,powerpc64-e6500-linux-gnu-gnatmake
> Creating configuration file: /project/hello_world_cpp/auto.cgpr
> Checking configuration /project/hello_world_cpp/auto.cgpr
>    Checking /project/hello_world_cpp/hello_world.cpp ...
>       -> object file /project/hello_world_cpp/hello_world.o does not exist
> Changing to object directory of "hello_world_cpp": "/project/hello_world_cpp/"
> /tools/gnat/powerpc64-e6500-linux-gnu/bin/powerpc64-e6500-linux-gnu-g++ -mtune=e6500 -mlongcall -mpowerpc -maltivec /project/hello_world_cpp/hello_world.cpp
>    Checking /project/common/dummy_common.adb ...
>    Checking binder generated files for hello_world.cpp...
>       -> up to date
>    Checking libhello_world_cpp.a ...
>       -> archive does not exist
> /tools/gnat/x86_64_gpl/bin/ar cr libhello_world_cpp.a /project/hello_world_cpp/hello_world.o
> /tools/gnat/x86_64_gpl/bin/ar: /project/hello_world_cpp/hello_world.o: No such file or directory
> global archive for project hello_world_cpp could not be built
> gprbuild: link of hello_world.cpp failed
> [2016-03-06 19:04:50] process exited with status 4, 100% (2/2), elapsed time: 00.42s
> 
> Below is the C++ compiler I defined in the compilers.xml file.
>   <!-- G++ for GNU Linux -->
>   <compiler_description>
>   <name>G++-PPC64</name>
>   <executable prefix="1">(powerpc64-e6500-linux-gnu)-g\+\+</executable>
>   <version>
>       <external>${PREFIX}-g++ -v</external>
>       <nogrep regexp="for GNAT Pro"></nogrep>
>       <grep regexp="^gcc \S+ (\S+)" group="1"></grep>    
>   </version>
>   <languages>C++</languages>
>   <target>
>     <external>${PREFIX}-g++ -dumpmachine</external>
>       <grep regexp="[^\r\n]+"></grep>
>     </target>
>   </compiler_description>

I have tried adding 

  PowerPC64_Linux_Archiver        := "powerpc64-e6500-linux-gnu-ar";
  PowerPC64_Linux_Archive_Indexer := "powerpc64-e6500-linux-gnu-ranlib";

  for Archive_Builder use (PowerPC64_Linux_Archiver, "cr");
  for Archive_Indexer use (PowerPC64_Linux_Archive_Indexer);

but that does not resolve my issue.  Does anyone have an idea what I am doing wrong?

Thanks,
Zack