Re: Can't build Ada

[Paul Koning <paulkoning@comcast.net>]

> On Nov 26, 2022, at 11:42 AM, Arnaud Charlet via Gcc <gcc@gcc.gnu.org> wrote:
> 
> 
>>> The current statement  (https://gcc.gnu.org/install/prerequisites.html) is:
>>> 
>>> GNAT
>>> In order to build GNAT, the Ada compiler, you need a working GNAT compiler (GCC version 5.1 or later).
>>> 
>>> so, if 5.1 is not working, then perhaps a PR is in order.
>> 
>> I will do that, if the "shell in Rosetta" thing doesn't cure the problem.
> 
> You won’t need to, the version of gnat you are using is recent enough, you need to follow Ian’s instructions to the letter. The Ada 2022 code is a red herring and is only problematic when you build a cross with a non matching native, not when building a native compiler.
> 
> Arno

All I can tell you is that I'm pretty sure I'm doing what Iain said, using his branch (up to date), and using the compilers from the Adacore open source release (20200818) which is GCC 8.4.1.  And once again I got that same complaint about Ada2020 constructs:

/usr/local/gnat/bin/gcc -c -g -O2      -gnatpg -gnata -W -Wall -nostdinc -I- -I. -Iada/generated -Iada -I../../../gcc-darwin/gcc/ada -Iada/libgnat -I../../../gcc-darwin/gcc/ada/libgnat -Iada/gcc-interface -I../../../gcc-darwin/gcc/ada/gcc-interface ../../../gcc-darwin/gcc/ada/contracts.adb -o ada/contracts.o
s-imagei.ads:95:11: declare_expression is an Ada 2020 feature
s-valueu.ads:152:09: declare_expression is an Ada 2020 feature
s-valueu.ads:160:09: declare_expression is an Ada 2020 feature
s-valueu.ads:184:06: "Subprogram_Variant" is not a valid aspect identifier
s-valuei.ads:80:11: declare_expression is an Ada 2020 feature
s-valuei.ads:95:08: declare_expression is an Ada 2020 feature
s-valuei.ads:141:06: "Subprogram_Variant" is not a valid aspect identifier
s-widthu.ads:84:09: declare_expression is an Ada 2020 feature
s-widthu.ads:93:11: run-time library configuration error
s-widthu.ads:93:11: file s-imgint.ads had parser errors
s-widthu.ads:93:11: entity "System.Img_Int.Image_Integer" not available
compilation abandoned
make[2]: *** [ada/contracts.o] Error 1

	paul