C/C++

New Topic

70 topics

Topics

Replies

Views

Last post

C on X86 : Static procedures can be set as globals

Last post by joukj « Fri Dec 08, 2023 8:30 am
Replies: 2
by joukj » Fri Dec 08, 2023 7:49 am

Hi all,

Consider the following:

rumba-jj) cc/vers
VSI C x86-64 X7.4-843 (GEM 50XB9) on OpenVMS x86_64 V9.2-1
rumba-jj) ty test1.c
typedef int...

2 Replies

34 Views

Last post by joukj
Fri Dec 08, 2023 8:30 am
/point=64=arg for clang

Last post by joukj « Tue Dec 05, 2023 1:24 am
Replies: 2
by joukj » Mon Dec 04, 2023 10:59 am

Hi,

I wonder what the clang unix style equivalent of /point=64=arg is. (-pointer=64=arg seems not to work)

Jouk

2 Replies

301 Views

Last post by joukj
Tue Dec 05, 2023 1:24 am
CXX/clang listing files

Last post by jreagan « Mon Dec 04, 2023 9:22 am
Replies: 1
by mberryman » Thu Nov 30, 2023 7:05 pm

How close are the CXX/clang compilers to generating listing files? I've run into a problem that I do not know how to solve without a listing file....

1 Replies

393 Views

Last post by jreagan
Mon Dec 04, 2023 9:22 am
C : #pragma pointer_size ignored???

Last post by joukj « Mon Dec 04, 2023 5:47 am
Replies: 2
by joukj » Mon Dec 04, 2023 4:51 am

Hi All

I get the following:

rumba-jj) cc/vers
VSI C x86-64 X7.4-843 (GEM 50XB9) on OpenVMS x86_64 V9.2-1
rumba-jj) ty test.c
#include
#include...

2 Replies

220 Views

Last post by joukj
Mon Dec 04, 2023 5:47 am
Low latency local event flags

Last post by pustovetov « Sat Nov 25, 2023 5:57 am
Replies: 2
by jhamby » Wed Nov 22, 2023 12:31 pm

I'm pleased to report that VMS local event flags are low-latency enough to use to wake up an event loop thread more quickly than other mechanisms, as...

2 Replies

1166 Views

Last post by pustovetov
Sat Nov 25, 2023 5:57 am
varargs -> stdarg

Last post by imiller « Fri Nov 24, 2023 10:57 am
Replies: 3
by imiller » Fri Nov 17, 2023 8:31 am

As the C compiler release notes strongly recommends using stdarg instead of varargs then I thought I should have a look at my code that uses...

3 Replies

803 Views

Last post by imiller
Fri Nov 24, 2023 10:57 am
Temp file frustration

Last post by jhamby « Wed Nov 22, 2023 11:25 am
Replies: 2
by jhamby » Wed Nov 15, 2023 3:55 pm

I recently posted about an issue with redirecting stdout and stderr of a child process to a file. The suggestion I received was to open the file for...

2 Replies

789 Views

Last post by jhamby
Wed Nov 22, 2023 11:25 am
More debugger woes...

Last post by tlovern « Mon Nov 20, 2023 1:03 pm
Replies: 18
by tlovern » Wed Oct 04, 2023 1:46 pm
1

2
debugger still doesn't evaluate local variables correctly....

simple code to illustrate the problem:

#include
#include
#include
#include...
18 Replies

22094 Views

Last post by tlovern
Mon Nov 20, 2023 1:03 pm
New one for me: LLVM ERROR: Cannot encode high byte register in REX-prefixed instruction

Last post by tlovern « Sun Nov 19, 2023 12:24 pm
Replies: 2
by tlovern » Sat Nov 18, 2023 11:43 am

trying to compile a module that have compiled successfully in the past....
sorry for the module size, but I couldn't add a .tlb as an attachment.......

2 Replies

484 Views

Last post by tlovern
Sun Nov 19, 2023 12:24 pm
VSI C x86-64 X7.4-843 .... LLVM ERROR: ... REX-prefixed instruction

Last post by jreagan « Fri Nov 17, 2023 12:54 pm
Replies: 7
by mgdaniel » Thu Nov 16, 2023 1:28 pm

$ X86VMS$ cc/version
VSI C x86-64 X7.4-843 (GEM 50XB9) on OpenVMS x86_64 V9.2-1
$ CC /DECC /STAND=RELAXED_ANSI /PREFIX=ALL /NAMES=AS_IS /OPTIMIZE...

7 Replies

617 Views

Last post by jreagan
Fri Nov 17, 2023 12:54 pm
C on X86 : evaluation of expressions

Last post by joukj « Thu Nov 16, 2023 1:53 am
Replies: 2
by joukj » Mon Aug 07, 2023 8:14 am

Hi

I get the following:
rumba-jj) cc/vers
VSI C X7.4-785 (GEM 50X65) on OpenVMS x86_64 V9.2-1
rumba-jj) ty test.c
#define DBL_M...

2 Replies

1267 Views

Last post by joukj
Thu Nov 16, 2023 1:53 am
CXX and atomic instructions

Last post by jreagan « Sun Nov 12, 2023 10:28 pm
Replies: 3
by mberryman » Mon Nov 06, 2023 2:36 pm

What atomic instructions are available to the C++ compiler on x86? I've been using __ATOMIC_EXCH_LONG, __CMP_SWAP_LONG_ACQ, and similar.

3 Replies

582 Views

Last post by jreagan
Sun Nov 12, 2023 10:28 pm
Help with mixing C and C++ code

Last post by mberryman « Thu Nov 09, 2023 1:58 am
Replies: 10
by mberryman » Tue Nov 07, 2023 2:42 am
1

2
Ok, I'm stumped. What is the syntax that would allow a C++ routine to call a C routine that is using 32-bit pointers? The following illustrates the...
10 Replies

943 Views

Last post by mberryman
Thu Nov 09, 2023 1:58 am
Replacing lib$spawn with vfork/execv

Last post by jhamby « Wed Nov 01, 2023 3:22 pm
Replies: 3
by jhamby » Mon Oct 30, 2023 10:04 pm

This is a continuation of something I'd been discussing on comp.os.vms, but the newsgroup has been taken over by spam lately, and this is probably a...

3 Replies

688 Views

Last post by jhamby
Wed Nov 01, 2023 3:22 pm
CXX on X86 : corrupt .obj file created without any error messages.

Last post by joukj « Mon Oct 23, 2023 4:46 am
Replies: 16
by joukj » Thu Sep 14, 2023 10:32 am
1

2
Hi I get the following:

rumba-jj) cxx/vers
clang version 10.0.1 (git@bitbucket.org:vms_software/llvm-10.0.1.git 1944c289616...
16 Replies

2421 Views

Last post by joukj
Mon Oct 23, 2023 4:46 am
CXX on X86 : LLVM ERROR: out of memory

Last post by joukj « Thu Oct 19, 2023 8:41 am
Replies: 8
by joukj » Tue Sep 12, 2023 7:17 am

Hi I get the following:

rumba-jj) cxx/vers
clang version 10.0.1 (git@bitbucket.org:vms_software/llvm-10.0.1.git 1944c289616...

8 Replies

1762 Views

Last post by joukj
Thu Oct 19, 2023 8:41 am
Compiler bug with 64-bit pointers and opt. level > 1

Last post by jreagan « Mon Oct 16, 2023 9:07 pm
Replies: 2
by jonesd » Thu Oct 12, 2023 4:34 pm

Some code I was working on was getting a null pointer dereference when compiled on X86 with /pointer_size=64 but operated as expected with 32-bit...

2 Replies

1114 Views

Last post by jreagan
Mon Oct 16, 2023 9:07 pm
Issue with specifying command line arguments to clang (when invoking clang as a foreign command)

Last post by pocketprobe « Fri Oct 13, 2023 11:42 am
Replies: 9
by dmjb » Tue Oct 10, 2023 4:28 pm

I am experimenting with using Clang as a C (not C++) compiler under VMS x86 V9.2-1. I have VSI-X86VMS-CXX-A1000-230901-1 installed. Since the CXX...

9 Replies

1476 Views

Last post by pocketprobe
Fri Oct 13, 2023 11:42 am
CXX on X86 : stream.h missing

Last post by jreagan « Thu Sep 28, 2023 3:43 pm
Replies: 5
by joukj » Mon Jun 19, 2023 6:26 am

Hi I get a missing stream.h in C++ on X86 (On IA64 and AXP it just works)

rumba-jj) cxx/vers
clang version 10.0.1...

5 Replies

1707 Views

Last post by jreagan
Thu Sep 28, 2023 3:43 pm
Debugger is much better, still has issues VMS921X_UPDATE

Last post by jreagan « Fri Sep 22, 2023 8:32 am
Replies: 3
by tlovern » Mon Aug 28, 2023 8:23 pm

─ SRC: module TEST -scroll-source───────────────────────────────────────────────────────────────────────────────
4433: *anotherString;
4434:
4435:...

3 Replies

1093 Views

Last post by jreagan
Fri Sep 22, 2023 8:32 am
More whiny x86_64 CXX complaints (repackaged by request)

Last post by jreagan « Wed Sep 20, 2023 5:47 am
Replies: 3
by sms » Thu Aug 31, 2023 5:11 pm

Referring to the OpenVMS x86-64 VSI C++ Release Notes Version:
230731 ), and the compiler it came with...

. . . . . . . . . . . . . . . . . . . . ....

3 Replies

11032 Views

Last post by jreagan
Wed Sep 20, 2023 5:47 am
CXX on X86 : wrong device when calling random_device

Last post by jreagan « Sun Sep 17, 2023 6:18 pm
Replies: 2
by joukj » Thu Sep 14, 2023 9:55 am

Hi

I get the following. when using random_device; it looks like the linux device is not ported

rumba-jj) cxx/vers
clang version 10.0.1...

2 Replies

895 Views

Last post by jreagan
Sun Sep 17, 2023 6:18 pm
C preprocessor gotcha / unexpected behavior

Last post by tlovern « Sat Sep 16, 2023 9:56 am
Replies: 8
by tlovern » Thu Sep 14, 2023 1:00 pm

In my code comments, I will use \ and / characters to indicate a comment applies to several lines of code:

char a ; // \
char b ; // + these are...

8 Replies

1262 Views

Last post by tlovern
Sat Sep 16, 2023 9:56 am
SOLVED: VSI C X7.4-785 on OpenVMS V9.2-1 can't name a variable readonly.

Last post by arne_v « Tue Sep 12, 2023 8:15 pm
Replies: 4
by pocketprobe » Mon Sep 11, 2023 11:48 pm

This one was discovered trying to build lynx on x86, and this short example triggers the issues.

#include

int main(int argc, char *argv[])
{
int...

4 Replies

1010 Views

Last post by arne_v
Tue Sep 12, 2023 8:15 pm
VSI C X7.4-785 (GEM 50X65) assert error: expression = isa<X>(Val) && "cast<Ty>() argument of incompatible type!"

Last post by mgdaniel « Fri Sep 08, 2023 7:26 pm
Replies: 3
by mgdaniel » Thu Aug 10, 2023 9:59 pm

X86VMS$ cc/version
VSI C X7.4-785 (GEM 50X65) on OpenVMS x86_64 V9.2-1
X86VMS$ CC /DECC /OPTIMIZE /STAND=RELAXED_ANSI /PREFIX=ALL /NAMES=AS_IS...

3 Replies

1327 Views

Last post by mgdaniel
Fri Sep 08, 2023 7:26 pm

New Topic

70 topics

Return to Board Index

Forum permissions

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum