IBM Z Software


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C/C++

Showing 42

Add support for function inlining at OPT(0) [Metal C]

The METAL option of the xlc compiler does not support selectively inlining functions without optimizing the rest of the code We would like to be able to use a compiler attribute (such as "__always_inline__" or "_inline") to force inlining of certa...
over 4 years ago in C/C++ and Fortran Compilers / C/C++ 2 Not under consideration

#pragma report should be extended to C

It is very frustrating that this pragma is not available in C, but only in C++!
over 9 years ago in C/C++ and Fortran Compilers / C/C++ 4 Not under consideration

XL C/C++ for z/OS Compiler Features

We'd like to move to using the newer Clang-based XL C/C++ compiler, but we need some features that are not present in the newer product, namely: AMODE31 supportEBCDIC supportHex float support
almost 5 years ago in C/C++ and Fortran Compilers / C/C++ 2 Future consideration

Perform optimizations based on __attribute__((__malloc__))

Currently, __attribute__((__malloc__)) does not work as documented in the compiler docs. The documentation infers that the compiler performs certain optimizations when using __malloc__ attribute. However, it appears that the compiler simply tolera...
over 9 years ago in C/C++ and Fortran Compilers / C/C++ 4 Not under consideration

The C++ interface for demangling new cxxabi names(generated by xlclang 16.1) are not implemented.

The C++ interface for demangling new cxxabi names(generated by xlclang 16.1) are not implemented. The C++ interface could only demangle old C++ names generated by xlC.
almost 5 years ago in C/C++ and Fortran Compilers / C/C++ 1 Future consideration

Using CPACF with HW built-In instructions

ISV likes to use HW Crypto support of CPACF (see Principles of Operation) in their applications running on z/OS. As of requiremts of their architecture and as of performance reasons, they do not use ICSF. So they have to use the CPACF instructions...
almost 10 years ago in C/C++ and Fortran Compilers / C/C++ 7 Not under consideration

Issue with Occurs clause Variables

We are migrating Micro focus COBOL programs to IBM COBOL for my client(shop direct). We see some initialization errors coming from mx20f program while compiling with IBM COBOL compiler. Initialization is not possible on occurs clause variables in ...
over 5 years ago in C/C++ and Fortran Compilers / C/C++ 4 Not under consideration

Support for calling Non-LE OS 31 linkage from xlclang++ in 64 bit mode.

Allow calling existing legacy Non-LE OS 31 from xlclang++ in 64 bit mode. Allow the generation of the OS 31 parameter list. It is the responsibility of the caller to make sure addresses and memory are below the bar. The compiler merely generates O...
over 5 years ago in C/C++ and Fortran Compilers / C/C++ 2 Future consideration

XL: Support linking objects compiled with clang++ and xlc or xlf that use OpenMP GPU offloading

SalesForce Case TS001968579PMR 82483,227,000 XLF compiler: Errors linking objects compiled with clang++ and xlc or xlf that use OpenMP GPU offloading. LLNL is having problems linking objects that were compiled using the clang++ (LLVM) and XLF (or ...
over 5 years ago in C/C++ and Fortran Compilers / C/C++ 2 Not under consideration

RFE for header file cache optimization on C compiler

We would like to see the following implemented with the C compiler frontend just like it is for the C++ compiler frontend beginning with Xlc 12.1: -qxflag=dircache[,m[,n]] where m and n are optional * m is a integral prime number between 2 and 71 ...
about 11 years ago in C/C++ and Fortran Compilers / C/C++ 5 Not under consideration

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