From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00
	autolearn=unavailable autolearn_force=no version=3.4.4
Path: 
 eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail
From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: How to configure GNAT GPL on x86-64 Linux for ARM ELF development
Date: Wed, 23 May 2018 09:07:51 +0100
Organization: A noiseless patient Spider
Message-ID: <ly7enuhk14.fsf@pushface.org>
References: <pe327n$28f$1@dont-email.me>
Mime-Version: 1.0
Content-Type: text/plain
Injection-Info: h2725194.stratoserver.net;
 posting-host="c4c7d705a3e848ab8e63cccb6944655a";
	logging-data="12231"; mail-complaints-to="abuse@eternal-september.org";
	posting-account="U2FsdGVkX1+oep6x7Tc4DdugQ2F4Z7L5hkh1GxreHJw="
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (darwin)
Cancel-Lock: sha1:SIj9xF6tB/aRArhUDUw4ILUYj+0=
	sha1:tsGbSafbwon2VNIIjciZV+puTqk=
Xref: reader02.eternal-september.org comp.lang.ada:52614
Date: 2018-05-23T09:07:51+01:00
List-Id: <comp.lang.ada>

Adam Jensen <hanzer@riseup.net> writes:

> $ arm-eabi-gcc -c -mcpu=cortex-m4 -mthumb program.adb
> fatal error, run-time library not installed correctly
> cannot locate file system.ads
> compilation abandoned

> Any advice on how to proceed would be very much appreciated! 

I think that the reason why the tutorial works and your attempt doesn't
is that the tutorial was developed on a Raspberry Pi, which is already
an ARM-based machine, so the native compiler actually has a runtime
(i.e. system.ads etc etc) visible to it.

Yours doesn't, and gcc-for-ada must see an RTS.

I managed to get a compilation using this over-the-top incantation:

   $ gprbuild -c -u -f program.adb --target=arm-eabi --RTS=zfp-stm32f4

but a simpler (more memorable!) procedure might be to construct your own:

1. Create directories adainclude/, adalib/

2. Copy $prefix/arm-eabi/lib/gnat/zfp-stm32f4/gnat/system.ads to your
   adainclude/ ($prefix is the root of your compiler installation, I
   think ~/.local/gnat-arm)

The zfp- (zero footprint) runtime is the closest to what you need, and
the fact that the -stm32f4 part isn't quite right shouldn't matter; I
suspect that system.ads is the same for all the zfp runtimes.

Now,

   $ arm-eabi-gcc --RTS=. -c program.adb