Re: LLVM and Ada

[Dennis Lee Bieber <wlfraed@ix.netcom.com>]

On Thu, 20 Oct 2016 07:28:01 -0700 (PDT), Vincent DIEMUNSCH
<vincent.diemunsch@gmail.com> declaimed the following:

>I heard that Duncan Sands has ported GNAT to LLVM in the DraggonEgg project, therefore I have two questions :

	For a study at work I had to get DragonEgg working... It took me three
Linux variants (my immediate supervisor provided a VM apparently
recommended by the client, and I tried using a VM install of Debian
[primarily as Debian provided the repository as DVD images -- company
firewall blocks apt-get except for the corporate approved Ubuntu image
using a corporate maintained repository]) to find one which had an old
enough GCC with which to build it. As I recall, I had revert from a 4.9 to
a 4.3 GCC (or something that drastic). I couldn't even build 4.3 using 4.9
due to changes in the make system, and sure wasn't going to try to build
sequentially 4.9 -> 4.8 -> 4.7 etc, until getting to the target variation.

	I managed to get it to build, and even produce bitcode from an
Helloworld.adb.

	However -- it would require porting the Ada RTL to do anything
meaningful... And since I didn't find anything in LLVM to produce a native
binary -- other than having it convert the bitcode into native assembly for
GCC to link -- it proved useless for the goal of porting an Ada application
to a board that didn't have support from AdaCore. 


	And, as mentioned, DragonEgg with Ada support is years out of date.

-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/