Re: V7R3 C++ questions

Thanks Aaron for helping with these questions.

Hi Kelly,

Here are some answers to your questions.

- We started to support a subset of C++11 features in ILE C++ compiler in
V7R2 release. And in V7R3 release, there were some new C++11 features
added. The supported feature list is in the 'What's new' page in 'ILE C/C+
+ Language Reference' document. Please see below. All the supported
features will be enabled when LANGLVL(*EXTENDED0X) option is specified.

V7R2 link "
http://www.ibm.com/support/knowledgecenter/ssw_ibm_i_72/rzarg/rzarg09.htm";
V7R3 link "
http://www.ibm.com/support/knowledgecenter/ssw_ibm_i_73/rzarg/rzarg09.htm";

- For ixlc interface, option '-qlanglvl=extended0x' should be used. Please
note that there is NO asterisk '*' in the front of 'extended0x'. This is
equivalent to CL command option LANGLVL(*EXTENDED0X). Following link shows
the mappings of CL command compiler options to their ixlc equivalents.

"
http://www.ibm.com/support/knowledgecenter/ssw_ibm_i_73/rzarf/qshell_compiler_options.htm
"

- For macro '__C99_FUNC__', this is an document error. The macro name
should be '__C99__FUNC__'. There should be two underscores '__' between
'__C99' and 'FUNC__'. We will update the document on knowledge center to
correct this error.

- Macro '__IBMCPP_NULLPTR' and '__IBMCPP_CONSTEXPR' work for me. Could you
please check if you have PTF SI61190 installed on your system? Most of new
C++11 features are enabled by this PTF on V7R3 release.


Thank you.

Qian Ren (Jarod)



From: "Aaron Albertson" <albertaa@xxxxxxxxxx>
To: "Bare Metal Programming IBM i \(AS/400 and iSeries\)"
<c400-l@xxxxxxxxxxxx>
Date: 02/04/2017 07:48 AM
Subject: Re: [C400-L] V7R3 C++ questions
Sent by: "C400-L" <c400-l-bounces@xxxxxxxxxxxx>




Hi Kelly,

That looks like a bug. I tried it myself and got the same results. I
believe that the primary compiler representative that would watch this
forum is on vacation right now, but I will forward a description of this
discussion chain to the team so that they are aware of the problem.
Hopefully when they get back they can comment on the issue. If this is an
urgent problem I would recommend contacting IBM support and they can
probably find somebody to look at the issue more quickly.

Thanks,

Aaron Albertson


"C400-L" <c400-l-bounces@xxxxxxxxxxxx> wrote on 02/03/2017 04:21:34 PM:

From: Kelly Beard <kenverybigliar@xxxxxxxxx>
To: "Bare Metal Programming IBM i (AS/400 and iSeries)"

<c400-l@xxxxxxxxxxxx>

Date: 02/03/2017 04:22 PM
Subject: Re: [C400-L] V7R3 C++ questions
Sent by: "C400-L" <c400-l-bounces@xxxxxxxxxxxx>

Sorry, but I cannot drop the issues I'm having with the V7R3 C++

compiler.

On our new system, ixlc points to this

/bin/ixlc -> /qsys.lib/qdevtools.lib/qczcxlc.pgm

Everytime I run it, a QPRINT spool file gets created which contains the
following, which I assume is debug statements:

Bytes_Return = 35
Bytes_Avail = 35
Libs_In_Syslibl = 0
Prod_Libs = 0
Curr_Libs = 0
Libs_In_Usrlibl = 0
Lib_Name = 'BEAK '

That's it. I also can't use the compile option "-qlanglvl=..." like the
following:

ixlc -+ QUSRJOBI_0400.cpp -omother -qprint -prtmsgid

-qlanglvl=*extended0x

INVALID COMPILING OPTIONS:-qlanglvl=*extended0x

This, however, works fine

CRTBNDCPP PGM(BEAK/MOTHER)
SRCSTMF('/home/beak/QUSRJOBI_0400.cpp')
OUTPUT(*print)
LANGLVL(*EXTENDED0X)
TGTRLS(V7R3M0)

If I am reading the V7R3 C++ reference manual correctly, I should be
getting more print statements out than I am. This program code

#include <iostream>
#include <string>
#include <sstream>
#include <iomanip>
#include <unistd.h>
using namespace std;

void function()
{
cout << __FUNCTION__ << ": I will do nothing sir, and like it!" <<

endl;

}


int main(int argc, char* argv[])
{
#if defined(__C99_FUNC__)
cout << "__C99_FUNC__ yes" << endl;
#endif
cout << __IBMCPP__ << endl;
#if defined(__IBMCPP_NULLPTR)
cout << "__IBMCPP_NULLPTR yes" << endl;
#endif
#if defined(__IBMCPP_CONSTEXPR)
cout << "__IBMCPP_CONSTEXPR yes" << endl;
#endif
cout << __C99_MAX_LINE_NUMBER << endl;
cout << __FUNCTION__ << endl;
function();
}

Doesn't print anything in regards to __C99_FUNC__, __IBMCPP_NULLPTR or
__IBMCPP_CONSTEXPR. I thought that they should if the *EXTENDED0X option
is specified.


On Fri, Feb 3, 2017 at 2:09 PM, Justin Taylor <JUSTIN@xxxxxxxxxxxxx>

wrote:

Thanks

-----Original Message-----
From: Aaron Albertson [mailto:albertaa@xxxxxxxxxx]
Sent: Friday, February 03, 2017 12:50 PM
To: Bare Metal Programming IBM i (AS/400 and iSeries)

<c400-l@xxxxxxxxxxxx

Subject: Re: [C400-L] V7R3 C++ questions


Hi Justin,

My apologies for misremembering the original question. I

looked

at the 7.1 version of the supported language extensions, and as you

said,

C++
11 does not appear in that list. That means that either C++ 11 is
entirely unsupported or only a small subset of C++ 11 features are
supported. You can assume that any set of compiler features that does

not

appear in the list is either not supported or only partially supported.

IBM i 7.1 GA'ed in 2010, prior to the ratification of C++ 11 in
2011.
There might be some limited subset of the functionality in the

compiler,

implemented with the assumption that they would become part of the

standard

when it was ratified. If there is a particular function that you are
interested in you should try it to see if it is part of the compiler.

Thanks,

Aaron Albertson



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