C/C++

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C on X86 : Static procedures can be set as globals

Last post by tlovern « Sat Dec 09, 2023 11:28 am
Replies: 7
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...

7 Replies

1178 Views

Last post by tlovern
Sat Dec 09, 2023 11:28 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

970 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

679 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

496 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

1245 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

919 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

843 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

22253 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

539 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

757 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

1321 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

653 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

1050 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

799 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

2528 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

1866 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

1176 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

1553 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

1789 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

1166 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

11098 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

979 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

1362 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

1121 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

1400 Views

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

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