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Posted on May 21, 2017 by Paul

Updated 29 May 2020

Turbo C 2b 2b 4.5 Free For Mac Download 3) Eclipse – Perfect C IDE for developers You surely have heard about Eclipse IDE, one of the oldest and most used IDE for almost any kind of language. Clang, the default compiler for macOS, supports only C, C, Objective-C and Objective-C. If you are interested in a modern Fortran compiler, e.g. You will need gfortran that comes with GCC. Another reason to have the latest stable version of GCC on your macOS is that it provides you with an alternative C and C compiler. C 2b 2b free download - 2B Egypt, 2B Magazine, 2B Sugar, and many more programs. The stable release of the software was in 2006. Although, the software has been discontinued by the company. But, it is available free to download and use for users. There will be no more updates and support provided to you. The interface is pretty intuitive and easy to navigate. It is definitely one of the best compilers for beginners. Notepad is a free (as in “free speech” and also as in “free beer”) source code editor and Notepad replacement that supports several languages. Running in the MS Windows environment, its use is governed by GNU General Public License.

In this tutorial, I will show you how to compile from source and install the current stable version of GCC on your macOS computer. The instructions from this tutorial were tested with latest version of Command Line Tools and Mojave (macOS 10.14). If you are using Catalina (macOS 10.15) check this tutorial.

Clang, the default compiler for macOS, supports only C, C++, Objective-C and Objective-C++. If you are interested in a modern Fortran compiler, e.g. you will need gfortran that comes with GCC. Another reason to have the latest stable version of GCC on your macOS is that it provides you with an alternative C and C++ compiler. Testing your code with two different compilers is always a good idea.

Building GCC 10 from sources could take some time, in my case it took a few hours on a MacBook Air with a 16GB of RAM.

In order to compile GCC from sources you will need a working C++ compiler. In the remaining of this article I will assume that you have installed the Command Line Tools for Xcode. At the time of this writing Apple’s Command Line Tools maps the gcc and g++ to clang and clang++. If you don’t have the Command Line Tools installed, open a Terminal and write:

which will guide through the installation process.

Let’s start by creating a working folder:

Next, we can download and extract the latest stable version of GCC:

GCC 10 depends on a couple of other libraries (GSL, GMP, MPFR and ISL) that can be downloaded with:

the above four prerequisites will be built during the GCC build.

We are ready to compile GCC now. Be prepared that this could take some time … Since I’m interested only in the C, C++ and Fortran compilers, this is the configure command I’ve used on my machine:

The above command instructs the configure app to add a prefix to all the resulting executable programs, so for example if you want to invoke GCC 10.1.0 you will write gcc-10.1, the gcc command will invoke Apple’s version of clang.

If you are interested in building more compilers available in the GCC collection modify the –enable-languages configure option.

And now, the final touches:

Grab a coffee, maybe a book, and wait … this should take approximately, depending on your computer configuration, an hour … or more … and about 4 GB of your disk space for the build folder.

Install the compiled gcc in /usr/local/gcc-10.1.0:

Now, you can keep the new compiler completely isolated from your Apple’s gcc compiler and, when you need to use it, just modify your path by writing in Terminal:

If you want to avoid writing the above command each time you open a Terminal, save the above command in the file .bash_profile from your Home folder, e.g:

You should be able to invoke any of the newly compiled compilers C, C++, Fortran …, invoking g++ is as simple as writing in your Terminal:

Remember to erase the working folder from your HOME if you want to recover some space:

Next, I’ll show you how to check if the compiler was properly installed by compiling and running a few examples. GCC 10 uses by default the C++14 standard and C11 for the C coders, you should be able to compile any valid C++14 code directly. In your favorite text editor, copy and save this test program (I’ll assume you will save the file in your Home directory):

Compiling and running the above lambda example:

We could also compile a C++ code that uses threads:

Next, we present a simple C++ code that uses regular expressions to check if the input read from stdin is a floating point number:

If you are a Fortran programmer, you can use some of the Fortran 2008 features like doconcurrent with gfortran-10.1:

The above code can be compiled with (assuming you’ve saved it as tst_concurrent_do.f90):

If you are interested in learning more about the new C++11/C++14 syntax I would recommend reading The C++ Programming Language by Bjarne Stroustrup.

or, Professional C++ by M. Gregoire, N. A. Solter, S. J. Kleper 2nd edition:

If you need to brush your Fortran knowledge a good book is Modern Fortran Explained by M. Metcalf, J. Reid and M. Cohen:

Intel C++ Compiler Classic and Intel oneAPI DPC++/C++ Compiler are Intel’s C, C++, SYCL, and Data Parallel C++ (DPC++) compilers for Intel processor-based systems, available for Microsoft Windows, Linux, and macOS operating systems.^[3]

Overview[edit]

Intel C++ Compiler Classic is available for Windows, Linux, and macOS and supports compiling C and C++ source, targeting Intel IA-32, Intel 64 (aka x86-64), Core, Xeon, and Xeon Scalable processors.^[4] It supports the Microsoft Visual Studio and Eclipse IDE development environments. Intel C++ Compiler Classic supports threading via Intel oneAPI Threading Building Blocks, OpenMP, and native threads.

Intel oneAPI DPC++/C++ Compiler is available for Windows and Linux and supports compiling C, C++, SYCL, and Data Parallel C++ (DPC++) source, targeting Intel IA-32, Intel 64 (x86-64), Core, Xeon, and Xeon Scalable processors, as well as GPUs including Intel Processor Graphics Gen9 and above, Intel X^e architecture, and Intel Programmable Acceleration Card with Intel Arria 10 GX FPGA.^[4] Like Intel C++ Compiler Classic, it also supports the Microsoft Visual Studio and Eclipse IDE development environments, and supports threading via Intel oneAPI Threading Building Blocks, OpenMP, and native threads.

DPC++^[5][6] builds on the SYCL specification from The Khronos Group. It is designed to allow developers to reuse code across hardware targets (CPUs and accelerators such as GPUs and FPGAs) and perform custom tuning for a specific accelerator. DPC++ comprises C++17 and SYCL language features and incorporates open-source community extensions that make SYCL easier to use. Many of these extensions were adopted by the SYCL 2020 provisional specification^[7] including unified shared memory, group algorithms, and sub-groups.

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Architectures[edit]

Intel C++ Compiler Classic targets general-purpose Intel x86-64 architecture CPUs including:^[4]

• Legacy Intel IA-32 and Intel 64 (x86-64) processors
• Intel Core processors
• Intel Xeon processor family
• Intel Xeon Scalable processors

Intel oneAPI DPC++/C++ Compiler generates code for both Intel’s general-purpose x86-64 CPUs and GPUs:^[4]

• Processors:
  • Legacy Intel IA-32 and Intel 64 (x86-64) processors
  • Intel Core processors
  • Intel Xeon processor family
  • Intel Xeon Scalable processors
• GPUs:
  • Intel Processor Graphics Gen9 and above
  • Intel X^e architecture
  • Intel Programmable Acceleration Card with Intel 10 GX FPGA

Toolkits[edit]

The Intel oneAPI DPC++/C++ Compiler is available either as a standalone component^[8] or as part of the Intel oneAPI Base Toolkit, Intel oneAPI HPC Toolkit, and Intel oneAPI IoT Toolkit.^[4]

The Intel C++ Compiler Classic is available either as a standalone component^[9] or as part of the Intel oneAPI Base Toolkit.^[4]

Documentation[edit]

Documentation can be found at the Intel Software Technical Documentation site.

Debugging[edit]

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The Intel compiler provides debugging information that is standard for the common debuggers (DWARF 2 on Linux, similar to gdb, and COFF for Windows). The flags to compile with debugging information are /Zi on Windows and -g on Linux. Debugging is done on Windows using the Visual Studio debugger and, on Linux, using gdb.

While the Intel compiler can generate a gprof compatible profiling output, Intel also provides a kernel level, system-wide statistical profiler called Intel VTune Profiler. VTune can be used from a command line or through an included GUI on Linux or Windows. It can also be integrated into Visual Studio on Windows, or Eclipse on Linux). In addition to the VTune profiler, there is Intel Advisor that specializes in vectorization optimization, offload modeling, flow graph design and tools for threading design and prototyping.

Intel also offers a tool for memory and threading error detection called Intel Inspector XE. Regarding memory errors, it helps detect memory leaks, memory corruption, allocation/de-allocation of API mismatches and inconsistent memory API usage. Regarding threading errors, it helps detect data races (both heap and stack), deadlocks and thread and synch API errors.

Support for non-Intel processors[edit]

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Previous versions of Intel’s C/C++ compilers have been criticized for optimizing less aggressively for non-Intel processors; for example, Steve Westfield wrote in a 2005 article at the AMD website:^[12]

Intel 8.1 C/C++ compiler uses the flag -xN (for Linux) or -QxN (for Windows) to take advantage of the SSE2 extensions. For SSE3, the compiler switch is -xP (for Linux) and -QxP (for Windows). ... With the -xN/-QxN and -xP/-QxP flags set, it checks the processor vendor string—and if it's not 'GenuineIntel', it stops execution without even checking the feature flags. Ouch!

The Danish developer and scholar Agner Fog wrote in 2009:^[13]

The Intel compiler and several different Intel function libraries have suboptimal performance on AMD and VIA processors. The reason is that the compiler or library can make multiple versions of a piece of code, each optimized for a certain processor and instruction set, for example SSE2, SSE3, etc. The system includes a function that detects which type of CPU it is running on and chooses the optimal code path for that CPU. This is called a CPU dispatcher. However, the Intel CPU dispatcher does not only check which instruction set is supported by the CPU, it also checks the vendor ID string. If the vendor string is 'GenuineIntel' then it uses the optimal code path. If the CPU is not from Intel then, in most cases, it will run the slowest possible version of the code, even if the CPU is fully compatible with a better version.

This vendor-specific CPU dispatching may potentially impact the performance of software built with an Intel compiler or an Intel function library on non-Intel processors, possibly without the programmer’s knowledge. This has allegedly led to misleading benchmarks,^[13] including one incident when changing the CPUID of a VIA Nano significantly improved results.^[14] In November 2009, AMD and Intel reached a legal settlement over this and related issues,^[15] and in late 2010, AMD settled a US Federal Trade Commissionantitrust investigation against Intel.^[16]

The FTC settlement included a disclosure provision where Intel must:^[17]

publish clearly that its compiler discriminates against non-Intel processors (such as AMD's designs), not fully utilizing their features and producing inferior code.

In compliance with this ruling, Intel added disclaimers to its compiler documentation:^[18]

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

As late as 2013, an article in The Register alleged that the object code produced by the Intel compiler for the AnTuTu Mobile Benchmark omitted portions of the benchmark which showed increased performance compared to ARM platforms.^[19]

Release history[edit]

The following lists versions of the Intel C++ Compiler since 2003:^[20]

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See also[edit]

• Intel Data Analytics Acceleration Library (DAAL)
• Intel Developer Zone (Intel DZ; support and discussion)
• Intel Integrated Performance Primitives (IPP)
• Intel Math Kernel Library (MKL)
• Intel Threading Building Blocks (TBB)
• VTune Amplifier
• LLVM/Clang

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References[edit]

1. ^Intel Corporation (2020-12-16). 'Intel® C++ Compiler Classic'. software.intel.com. Intel. Retrieved 2021-02-09.
2. ^Intel Corporation (2020-12-16). 'Intel® oneAPI DPC++/C++ Compiler'. software.intel.com. Intel. Retrieved 2021-02-09.
3. ^Intel (2021). 'Intel oneAPI DPC++/C++ Compiler'. Intel.com. Intel. Retrieved 2021-02-09.
4. ^ ^abcdefIntel Corporation (2021). 'Intel® oneAPI DPC++/C++ Compiler'. software.intel.com. Intel. Retrieved 2021-02-09.
5. ^'Intel oneAPI DPC++ Compiler 2020-06 Released With New Features - Phoronix'. www.phoronix.com. Retrieved 2020-12-17.
6. ^Team, Editorial (2019-12-16). 'Heterogeneous Computing Programming: oneAPI and Data Parallel C++'. insideBIGDATA. Retrieved 2020-12-17.
7. ^'Khronos Steps Towards Widespread Deployment of SYCL with Release of SYCL 2020 Provisional Specification'. The Khronos Group. 2020-06-30. Retrieved 2020-12-17.
8. ^Intel Corporation (2020-12-16). 'Intel® oneAPI DPC++/C++ Compiler'. software.intel.com. Intel. Retrieved 2021-02-09.
9. ^Intel Corporation (2020-12-16). 'Intel® C++ Compiler Classic'. software.intel.com. Intel. Retrieved 2021-02-09.
10. ^ ^abcdIntel Corporation (2020). Intel® C++ Compiler Classic Developer Guide and Reference. Intel. p. 131–135.
11. ^'Intel® Compilers | Intel® Developer Zone'. Intel.com. 1999-02-22. Retrieved 2012-10-13.
12. ^'Your Processor, Your Compiler, and You: The Case of the Secret CPUID String'. Archived from the original on 2012-01-05. Retrieved 2011-12-11.
13. ^ ^ab'Agner`s CPU blog - Intel's 'cripple AMD' function'. www.agner.org.
14. ^Hruska, Joel (29 July 2008). 'Low-end grudge match: Nano vs. Atom'. Ars Technica.
15. ^'Settlement agreement'(PDF). download.intel.com.
16. ^'Intel and U.S. Federal Trade Commission Reach Tentative Settlement'. Newsroom.intel.com. 2010-08-04. Retrieved 2012-10-13.
17. ^'FTC, Intel Reach Settlement; Intel Banned From Anticompetitive Practices'. Archived from the original on 2012-02-03. Retrieved 2011-10-20.
18. ^'Optimization Notice'. Intel Corporation. Retrieved 11 December 2013.
19. ^'Analyst: Tests showing Intel smartphones beating ARM were rigged'.
20. ^'Intel® C++ Compiler Release Notes and New Features'. Intel Corporation. Retrieved 27 April 2021.
21. ^This note is attached to the release in which Cilk Plus was introduced. This ULR points to current documentation: http://software.intel.com/en-us/intel-composer-xe/
22. ^Intel C++ Composer XE 2013 Release Notes[1]http://software.intel.com/en-us/articles/intel-c-composer-xe-2013-release-notes/

External links[edit]

• Single Component Downloads and Runtime Versions (Intel)