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Mon, 24 Jan 2022 14:26:45 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Skip Tavakkolian Date: Mon, 24 Jan 2022 14:26:34 -0800 Message-ID: Subject: Re: [9fans] Strange 'uintptr' behavior To: 9fans <9fans@9fans.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Topicbox-Policy-Reasoning: allow: sender is a member Topicbox-Message-UUID: ba656b36-7d64-11ec-8678-b1c7cd2c9c5a Archived-At: =?UTF-8?B?PGh0dHBzOi8vOWZhbnMudG9waWNib3guY29tL2dyb3Vwcy85?= =?UTF-8?B?ZmFucy9UYjVmZTBkYzQzNDQ3YWIyYy1NN2ZkMTY3OWNmOTY1ZmMxNWVhY2Vh?= =?UTF-8?B?YTQ3Pg==?= List-Help: List-Id: "9fans" <9fans.9fans.net> List-Post: List-Software: Topicbox v0 List-Subscribe: Precedence: list Reply-To: 9fans <9fans@9fans.net> List-Unsubscribe: , Topicbox-Delivery-ID: 2:9fans:437d30aa-c441-11e9-8a57-d036212d11b0:522be890-2105-11eb-b15e-8d699134e1fa:M7fd1679cf965fc15eaceaa47:1:ozyu9CLv3Y4QkQ4sCyRiCoUgm1w9U8zb5otuD0ILNmc maybe a previous fix was not applied? there is a slight difference in the error messages between the address of zeroth element vs first element (see line 9 vs 10 errors below). regardless, it's working as expected on vanilla Plan 9: % cat addrgames.c #include #include void main(int argc, char **argv) { #ifdef USEUINTPTR uintptr frst[] =3D {nil, nil, nil, nil, nil}; uintptr scnd[] =3D {nil, nil, frst, &frst[1]}; uintptr thrd[] =3D {nil, nil, frst, &frst[0]}; #else void* frst[] =3D {nil, nil, nil, nil, nil}; void* scnd[] =3D {nil, nil, frst, &frst[1]}; void* thrd[] =3D {nil, nil, frst, &frst[0]}; #endif exits(""); } % 8c addrgames.c % 5c addrgames.c % vc addrgames.c % 6c addrgames.c % 5c -D USEUINTPTR addrgames.c addrgames.c:8 incompatible types: "ULONG" and "IND VOID" for op "AS" addrgames.c:8 incompatible types: "ULONG" and "IND VOID" for op "AS" addrgames.c:8 incompatible types: "ULONG" and "IND VOID" for op "AS" addrgames.c:8 incompatible types: "ULONG" and "IND VOID" for op "AS" addrgames.c:8 incompatible types: "ULONG" and "IND VOID" for op "AS" addrgames.c:9 incompatible types: "ULONG" and "IND VOID" for op "AS" addrgames.c:9 incompatible types: "ULONG" and "IND VOID" for op "AS" addrgames.c:9 incompatible types: "ULONG" and "IND ULONG" for op "AS" addrgames.c:9 incompatible types: "ULONG" and "IND ULONG" for op "AS" addrgames.c:10 incompatible types: "ULONG" and "IND VOID" for op "AS" addrgames.c:10 incompatible types: "ULONG" and "IND VOID" for op "AS" too many errors On Mon, Jan 24, 2022 at 8:51 AM Pavel Klinkovsk=C3=BD wrote: > > Hi all, > > I tried some artificial example for Plan9 compiler (5c)... > > This code is compiled without any problem: > uintptr frst[] =3D {nil, nil, nil, nil, nil}; > uintptr scnd[] =3D {nil, nil, frst, &frst[0]}; > > But this one fails: > uintptr frst[] =3D {nil, nil, nil, nil, nil}; > uintptr scnd[] =3D {nil, nil, frst, &frst[1]}; > > ...with message: > cpu% 5c -p t.c > /usr/pavel/t.c:16[t.c:888] initializer is not a constant: scnd > > OTOH, replacement of 'uintptr' by 'void*' is compiled without any problem: > void* frst[] =3D {nil, nil, nil, nil, nil}; > void* scnd[] =3D {nil, nil, frst, &frst[1]}; > > Any explanation is appreciated. > > Pavel > > 9fans / 9fans / see discussions + participants + delivery options Permali= nk ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/Tb5fe0dc43447ab2c-M7fd16= 79cf965fc15eaceaa47 Delivery options: https://9fans.topicbox.com/groups/9fans/subscription