Clang vs gcc vs msvc. GCC uses its own IR generation where Clang uses LLVM IR.

Clang vs gcc vs msvc I maintain an OSS tool that is built for Linux with both GCC and Clang, and with Microsoft's compiler for Windows. The project property pages for a Clang configuration are similar to the ones for MSVC. aggr]/5. New full episodes are released once or twice a week and 1-2 new clips or a new non-p Mar 20, 2024 · You can now build and debug the project using the Clang tools. Clang also comes with a lot of handy code analysis tools like clang-format and clangd. 8. Clang and G++ should be interoperable if you set the right settings, and Clang and MSVC may be interoperable depending on which exact features you use. I would like to know if this is a non standard feature by msvc or a bug in gcc (Or more correctly the version v5. , a definition as specified in [namespace. The Clang project enjoys the support of several major vendors, including Apple, Google, Microsoft, Intel, and AMD, possibly because they find Clang's permissive free software license easier to integrate with commercial projects than the GPL3 license attached to GCC. In the header file I declare a templated subclass as follows: Aug 19, 2011 · If you think of using gcc to compile code and have it call the Windows API, it's okay as it's C; but for C++ DLLs generated by MSVC, you might have a harsh wake-up call. While it has become more modular over time, it is still less modular than Clang. From [expr. Code complexity – GCC is a very complicated software with more than 15 million lines of code. Clang is going to use the standard library (and other libraries/headers) of that compiler, since it doesn't ship with ones of its own. GCC didn't recognize the second error, and the "expected ';' before 'return'" errors from MSVC and GCC are like saying that to climb a tree, I must put the tree below me. We use GCC. Both GCC and LLVM requires architecture-specific backend (64-bit x86, ARM, etc). I have project of mine that compiles on both GCC/G++ and Clang perfectly fine. 28 (VS 2019) 16. Start from -Wall -Wextra and remove those you don't like with -Wno-* like you are already doing. exe. Jun 22, 2020 · Both GCC and Clang are standard compliant. May 27, 2024 · – GCC: Historically, GCC was designed as a monolithic compiler with tightly coupled components. (1) When the company started & chose vxWorks, clang wasn’t an option. – Clang clearly won here, with MSVC in second. exe，一路 Jul 19, 2014 · @antiduh If I understand your post correctly. Jun 25, 2023 · E. MSVC is wrong in the first case. Most of the time this is not what you want, and you'll get cryptic errors. 3. libc, which determine the "env" or "abi" part of the target triple). You can't compile a C++ interface and mix and match between compilers, unless it is explicitly supported. The benefit of LLVM is that it does not do as much as GCC does during conversion to some intermediate representation so people could do more (for example, analysis) with the LLVM IR than GCC RTL? – Jan 8, 2020 · On another note, The VS vectorizer lacks quite a bit of features when compared to gcc or clang. lld-link seem support most msvc link features too. Oct 4, 2014 · However, with clang, you seem to compile in C++14 mode, which removed the "no brace-or-equal initializers" limitation (n3690, §8. namespace]/4:. Because GCC is very stable and clang is still under developing. Jun 30, 2011 · I decided to compile it myself but as the libiconv documentation states, there is no official support for MSVC compilers. 2. 10. This paper reports a performance-based comparison of six state-of-the-art C/C++ compilers: AOCC, Clang, G++, Intel C++ compiler, PGC++, and Zapcc. MSVC code generation quality is almost on par with GCC and Clang. txt 677 clang_emmited. Sometimes this has a huge payoff. fct]), then the template-parameter is a template parameter pack. Clang 17 were tested as what's readily available on Ubuntu 23. #endif doesn't work, both compilers define _MSC_VER. However, when compiling with GCC or Clang using the -Wconversion flag, no warning is issued, whereas MSVC correctly reports a warning. In addition to the Microsoft Visual C++ compiler that many of you are likely familiar with, Visual Studio 2017 also supports Clang, GCC, and other compilers when targeting certain platforms. In the May 17, 2024 · It is available in both Clang and GCC, but not in MSVC. [dcl. May 1, 2023 · C++ : Clang vs GCC vs MSVC template conversion operator - which compiler is right?To Access My Live Chat Page, On Google, Search for "hows tech developer con Feb 21, 2018 · さて、Clangはどうかというと、Cygwin、MinGW、WSLそれぞれで利用する方法はありますが、LLVMは公式でMSVCのcl. We measure two aspects of the compilers’ performance: Feb 27, 2023 · Compiling your Windows software with ClangCL may lead to better performance (in Release mode). The toolchain is not nearly as powerful or flexible as Mingw-w64. Edit the source code of gcc or clang to build your own compiler and give the desired layout. MSVC gives me at least 10% more performance in graphical applications. 25107. Errors and warnings are displayed in the Output Window. I never tested Clang but I know ICC was the slowest I tested. Clang/GCC on Godbolt. GCC or clang are both great for C++ development as they are conforming C++14 implementations. And there were a bunch more. Mar 5, 2024 · This should, theoretically, trigger a warning about type conversion. 2 v clang 3. #ifdef _MSC_VER //. Aug 14, 2014 · The code is not valid C++03, although it is valid C++11. I would choose the default toolchain for the platform you are on. Clang tries to be compatible with GCC, but sometimes it just quietly ignores them. 1 v clang 3. 22) is literally more than order of magnitude slower (278mln). IBM and a few others are the main contributors towards GCC. Nov 14, 2024 · the difference is not in the C compilers per se (clang vs gcc), it is the C runtimes (a. Although it has well-defined frontend/backend stages, the software in itself is more monolithic in nature. And that unsurprisingly exactly matches C++ 20 and especially 23 implementation progress. May 11, 2023 · Phoronix: LLVM Clang 16 vs. MSVC produces significantly better binaries than gcc even with -March and -mtune enabled in gcc. On gcc, execution time came down to 10 ms without compiler optimization and with O3 flag, per run came down to <5ms. Windows has enough! For me both Clang v8. the many different llvm obfuscator projects are use clang, and clang support inline x64(msvc no this). My own experience with a substantial codebase (1+ million lines of code) is MSVC uses the least amount of RAM, followed by clang and then GCC. A compatible STL wasn't Comparing MSVC vs Clang . capture]/3 (C++17 draft N4659). Related questions. In the question“What are the easiest to use C++ compilers and IDEs?” Microsoft Visual C++ is ranked 2nd while GCC is ranked 3rd. 10 Linux plus a look ahead in using the latest GCC 14 and LLVM Clang 18 development snapshots as of this week. LLVM Clang 16 compiler benchmark comparison will be happening soon on AMD Zen 4 as well, with the AMD znver4 target being new to GCC 13. However, if you use __declspec(empty_bases), you can tell MSVC to enable this optimization: Nov 12, 2022 · A brief overview about Clang and GCC. MSVC (actually the compiler is just called CL. 65bln vs 3. On Linux your main options are GCC and Clang. g if you install pacman -S gcc, forget to install pacman -S -gcc, then try to run gcc from any environment other than MSYS, you'll call GCC of the MSYS environment, instead of your environment's GCC. I have tested the different C++ compilers and listed the results in my C++ manual. 답변, 사실, 참고 자료 또는 전문 지식을 통해 답변이 뒷받침 될 것으로 예상되지만이 질문은 토론, 논쟁, 여론 조사 또는 광범위한 토론을 요구할 것입니다. 2 Mar 11, 2020 · Use clang or g++ instead of MSVC, in Windows. lambda. org and see the Clang, ICC, and GCC output. Each to his own. Jul 31, 2022 · what is the difference between x86_64-pc-windows-msvc and x86_64-pc-windows-gnu targets in clang. godbolt. 2 for C++. Let's see who is really better by testing common errors in Clang 6. Right? I'm not saying GCC is superior to Clang in anyway. What I am saying that in this specific case, Clang certainly does the inferior thing, and GCC, the superior. Modified 2 years, 5 months ago. On Windows, Visual Studio. However, MSVC has a template parsing model that delays nearly every lookup to instantiation time, which is part of phase 2. 0 and GCC v8. 0, GCC 7. UPDATE: GCC 4. However, I read somewhere that gcc could generate static libraries that were binary compatible with MSVC compilers, as long as the binary interface remains in C. Considering the non-derived case ("Foo") where all compilers agree to call the templated constructor, I think that this is a bug in clang and gcc and that MSVC is correct? Or am I interpreting things wrong and Are you one of those programmers still debating about Clang or GCC? Then this awkward an delicious video is for you! Both Clang and GCC are pretty good#pr Mar 8, 2013 · However if bar is const gcc and msvc are happy to compile it when called like this call<const foo, &foo::bar>(). Mar 20, 2015 · When I compile a large project (for example, Bitcoin) in both GCC (using MinGW) and in MSVC (using Visual Studio) using comparable optimization settings, the GCC binary is 6 mb and the MSVC binary is 4 mb. Even at -O2: Clang's loop unrolling attempts at -O2 are more aggressive than GCC's loop unrolling attempts at -O3. I am using C++17. a. To achieve this there is really just one way: test your code on all these platforms. Feb 27, 2023 · run in the VS development prompt will get it working with the normal clang frontend, so you can use the normal GCCish arguments. prim. MSVC ABI and Itanium disagree about a lot of things. 3 Code compiling on gcc, but not Feb 7, 2022 · Namely, clang 13 and gcc 11. Many gcc extensions and almost all of the command line options are supported by clang. The VS based Clang compilers will define both the VS specific _MSVC_LANG=201402 (C++14 standard), and the C++ standard __cplusplus=201402. 4 comparison is appended to that. While MSVC allows for certain code to compile, enabling the -Wextra flag in Clang or GCC on Godbolt may result in compilation errors. over] ( Emphasis Mine ) : For Clang I usually use the trunk version (again, because it is easy to build), but I never saw it generating wrong output. The enclosing namespaces of a declaration are those namespaces in which the declaration lexically appears, except for a redeclaration of a namespace member outside its original namespace (e. Perhaps gcc implements something similar - we will see. Mar 28, 2017 · @Yakk: For an implementation to qualify as Safely-Conforming, for example, it would have to either specify the ways in which it might behave if a stack overflow occurs, or provide means by which it could statically verify that stack overflows could not occur when given a Selectively-Conforming program (adding a stack-check intrinsic to the language would make support for such a guarantee Sep 16, 2020 · On Windows, Clang is not self-sufficient, and is supposed to be used in combination with an other compiler: either MinGW (GCC) or MSVC. Jul 24, 2022 · Constexpr function evaluation on a template parameter object (MSVC vs clang/gcc) Ask Question Asked 2 years, 5 months ago. GCC is the only one I think doing what makes the most sense (for maximum throughput) to me. 2 10E125, Xcode 10. (icc be damned). This flag can help developers catch potential issues in their code that might otherwise go unnoticed. I have recommended Windows users build their librairies with ClangCL and I maintain this recommendation. Nov 9, 2019 · This is a clip from a conversation with Bjarne Stroustrup from Nov 2019. As part of the various end-of-year articles, this article is providing a fresh look at the GCC vs. 3) is a local lambda expression; any other lambda-expression shall not have a capture-default or simple-capture in its lambda-introducer. on Windows, we have -msvc vs -gnu (vs -gnullvm); on Linux, we have mainly -gnu vs -musl, (there are many other environments too, mostly for specific hardware or embedded systems, such Apr 19, 2021 · So either gcc or clang. These default to the values of 1800 and 180000000 respectively, making clang look like an early release of Visual C++ 2013. 3 of MinGW) Consider the following code: I'd like to use clang without GCC on Linux and without MSVC on Windows. 1 (Quoted from: Nov 7, 2018 · The following preprocessor macros (the usual suspects: testing on empty argument list and counting number of arguments) run without warnings on gcc/clang but fail on Microsoft VisualC: // IS_EMPTY() returns nothing if the parameter list is empty and a single ',' (comma) otherwise. mingw use gcc , no that easy to use in visual studio. On OSX (& most/all BSD variants) clang. Clang complains that the second template parameter is invalid. 10 (VS 2017) TS only, 19. Score: Clang: 2, GCC: 0, MSVC: 1. GCC has become the standard, and clang could be an alternative. More devs ~= faster progress. Feb 20, 2018 · List-initialization of an object or reference of type T is defined as follows:. Jul 21, 2015 · @user2565020: It can be. Is there a simple and robust way to detect gcc, i. Using. Feb 3, 2013 · I'm trying to deal with namespaces & templates in C++. Sep 10, 2014 · In short: Clang is correct (though in one case, for the wrong reason). My understanding is that this wasn't possible in the past due to: A LLVM linker wasn't available. When talking about optimization, and "reliability", Clang wins because of the LLVM. clang and g++ are correct. Clang has command line interface as GCC making it easy to switch between them. MSVC vs. Apr 12, 2022 · This is a problem with MSVC. Share Improve this answer Sep 2, 2016 · IMHO I believe that GCC is wrong and CLANG is correct here. However, compiling with ClangCL takes much longer. txt 441 gcc_emmited. For example, clang generates mediocre x87 floating point code while gcc excels in this regard. The g++ 4. It doesn't quite support C99 and probably never will. GCC uses its own IR generation where Clang uses LLVM IR. These two compilers are very similar. Aug 4, 2020 · I see at least in the current clang trunk that there is some notable progress to improve compile times in combination with templates and precompiled headers / modules. 1 and Clang 16. Here is a link with more information: GCC is a set of the full compiler, where Clang isn't. But thanks for your comments. 1 partial (Xcode 10. From the official docs of VS Code : intelliSenseMode: The IntelliSense mode to use that maps to an architecture-specific variant of MSVC, gcc, or Clang. $ wc -c clang_emmited. Looking at some of their features plus pros and cons. If it’s linking that’s taking the time, adding the “-fuse-ld=lld” argument will speed it up a lot, as lld is much faster than link. It misses a lot of basic optimisations that you'd expect, and trips up over pretty much everything. And: $ wc -c gcc_emmited. Aug 8, 2024 · 与 GCC 兼容： Clang 支持大多数 GCC 的 来开发C++， 所有我只需要下载MSVC编译器。 双击打开下载好的vs_BuildTools. 1/1): An aggregate is an array or a class (Clause 9) with no user-provided constructors (12. This post is intended to familiarize you with the variety […] Sep 12, 2019 · The open source compilers Gcc and Clang have now taken the lead. Platform defaults: Windows: msvc-x64; Linux: gcc-x64; macOS: clang-x64 Clang is popular on BSD. e. Aug 12, 2015 · The issue is things like vtable layout. The entire module's computation took 30s on msvc. GCC and clang have some differences on expressions like a+++++a, and I've got many different answers with my peer who use clang on Mac while I use gcc. If a template-parameter is a type-parameter with an ellipsis prior to its optional identifier or is a parameter-declaration that declares a pack ([dcl. 37bln), but MSVC (latest one , v19. Some implications are that in, In MSVC, you have to export explict instantiated template classes. I can get the following code to compile in MSVC (no warnings or errors), but am having no luck at all with various permutations with CYGWIN/GCC. The Gcc and Clang compilers are clearly the best when it comes to code optimization. Visual Studio usually doesn't provide the latest version Note that VS tries to provide the latest version of Clang/LLVM in a timely manner, but we need to wait for the final release version, do installer work and run testing, and then we're subject to the latency in the VS release pipeline (after a change is merged, it takes a while before it appears in a VS Preview, and then more time before Jul 6, 2010 · Here are some up-to-date albeit narrow findings of mine with GCC 4. Dec 10, 2018 · For instance you can aim for your code to work on x64 linux and windows, gcc clang and msvc, latest version , or from version x upwards and ignore everything else. So, while the msvc people are really fantastic, and they've made massive strides from a conformance perspective, msvc also by far produces the worst code of the gcc/clang/msvc trio in my experience. MSVC: This compiler is for Microsoft's Visual C++ (MSVC) environment . If not set or if set to ${default}, the extension will choose the default for that platform. Note however, how the Msys2 MinGW Clang might also define the _GLIBCXX_USE_CXX11_ABI to instruct to use the libstdc++ or the libstdc++11 C++ standard library. May 11, 2023 · A similar GCC 13 vs. A lambda-expression whose smallest enclosing scope is a block scope (6. But other programs might favor clang's (or MSVC's) optimizer and code generator. This round of testing was focused on the performance of the resulting binaries generated by each compiler. On msvc it took 70~110 ms per run. Now I am wondering, does this say that MSVC produces better binaries (and I mean better as in smaller+faster)? Oct 13, 2022 · Something similar happens with the C++ standard. Windows 10, x64, 1809. txt. g. You'll have to tell the extension to use GCC/clang compatible headers, but I don't know how. This delay is why your example would compile with MSVC(which is non-conforming) and not in clang. GCC improved their diagnostics and released their comeback article, titled “Clang Diagnostics Comparison”. What does the standard require? Background: I am providing a combination of a template-argument-dependent return-type and static_assert to indicate correct or incorrect template arguments in a function. Does anyone know how to distinguish if my code is currently compiled by clang-cl or msvc's cl? Without passing any extra defined macros on command line. 8; Apple Clang 10. In MSVC-based Clang, between LLVM/Clang and Visual Studio ClangCL, the final decision is probably the IDE. 3). Usually it's marginally faster with GCC. When comparing GCC vs Microsoft Visual C++, the Slant community recommends Microsoft Visual C++ for most people. When I put const in the template arguments (void (T::*pf)() const) all tree compile it. If you rank the resources contributed to each compiler ecosystem, MSVC comes top, then GCC + libstdc++, then clang + libc++. They're more similar than Clang is to MSVC in my experience, and I suspect you'd have fewer issues trying to switch between them if you get your project to build with one. exe）をビルドできるようになっています。 Apr 1, 2018 · By default, MSVC doesn't do this optimization so that code it compiles can be ABI compatible with older versions of the compiler. Posted on April 1, 2020 March 24, 2020 by David. – So your second example is the only correct way to do it; GCC and Clang may have been optimizing away the use of foo::a since references can’t be rebound. GCC vs clang / LLVM — 각각의 장단점 20 현재로서는이 질문이 Q & A 형식에 적합하지 않습니다. While that sounded crazy, I gave it a try and it actually Dec 24, 2019 · The C++ standard disqualifies evaluated id-expressions that have reference types from participating in constant-expressions (unless some more constraints are met, which is not the case for this code). Clang doesn't understand the MSVC extensions, nor would MSVC be able to use gcc/clang libraries. clang and gcc try to have the same extensions, so they can use the same libraries. 5. If I am making a Windows program I will be using MSVC even though I am 100% in love with gcc. memdef]). GCC is wrong in the second case. 7. exe) is the "official" compiler for Windows made by Microsoft themselves. 12 Clang vs MSVC: Treatment of template function prototypes. Otherwise, if T is an aggregate, aggregate initialization is performed. It was highly optimized. Clang first dissed GCC in their “Expressive Diagnostics” article. However there are still situations, where I would like to handle something specifically for gcc, and not for clang. – Apr 16, 2022 · I came across the following statement in the standard:. 3/p1 Overload resolution [temp. Clang uses LLVM in the backend. – These days there are few differences between compilers (MSVC, GCC, Clang/LLVM). , {}. Since there doesn't seem to be any significant speed difference between the two compilers, what are the pros and cons of choosing one compiler over another? May 12, 2021 · GCC 11 partial; Clang 8 partial; MSVC 19. Compile on both (and also Linux / gcc) to cross reference standards compliance and warnings etc. May 27, 2021 · Clang Vs GCC comparison here wouldn’t be fair as GCC has no plans to natively support Windows. I personally try to avoid the Visual Studio installation (including "minimal" build tools) spamming my worktation with more cruft. May 19, 2021 · There is CLang-CL which is a drop-in replacement for MSVC's CL. 0 (VS 2015) partial, 19. Practically both are well optimized, however, LLVM IR is much more robust and modular, than GCC IR. I'll try to justify my claim below: According to the standard §14. For performance in terms of compiling/linking it's GCC/clang tied and then MSVC from fastest to slowest. 1), no private or protected non-static data members (Clause 11), no base classes (Clause 10), and no virtual functions (10. I am currently using MinGW64, MSYS2, and CMake to compile (Targeting 64bit x86 Windows and Linux). can use clang driver too like this Using llvm-msvc to compile your One of the many key differences between C++ Compilers GCC & MSVC is that in the first all symbols from a shared library are exported by default, while MSVC exports nothing. init. Just an FFT function would be called nearly 500 times per execution. . 2 call the copy constructor of Foo while MSVC v19. It is technically true, but it is stupid. MSVC is Microsoft's compiler, GCC is technically the "Gnu Compiler Collection" but the same abbreviation is commonly used to denote the "Gnu C Compiler" and because we're lazy also the "Gnu C++ Compiler". Clang has better warnings but the optimizer is deficient, especially for older platforms. Round 2: The Missing Brace Jan 16, 2014 · You can drop this into gcc. Sometimes a program is a lot faster when compiled with GCC, sometimes it's a lot faster with clang. Nov 21, 2011 · I think clang could be an alternative. And now, I have a question regarding MSVC. Visual Studio is a little bit lagging but it's catching up. k. Clang performance of the generated binaries on x86_64. Feb 3, 2022 · Template by method pointer in clang vs gcc and msvc. Also, gcc has the proper coroutine support header but limited optimisations, while clang has powerful optimisations for coroutines but doesn't work with the libstdc++ header and the libc++ header is still under the experimental subdirectory last time I checked. Sep 12, 2016 · Detection of gcc and clang is explained in this StackOverflow question: Detect gcc as opposed to msvc / clang with macro. 8 compiler is abiding to the C++11 rules and ignoring inaccessible members in an SFINAE context, while clang compilers is abiding to the C++03 where the member (constructor in this case) is found and selected, but access checks make the code invalid. 1. GCC 13 Compiler Performance On Intel Raptor Lake For those wondering how the recent releases of the Clang 16 and GCC 13 are competing for the fastest generated binaries of these leading open-source compilers, here is a fresh round of benchmarks from an Intel Core i9 13900K "Raptor Lake" system looking at the Jan 9, 2018 · I have some code that compiles using msvc but not under gcc. With GCC and clang, my code will be auto-vectorized if I compile with -O2 -ftree-vectorize -march=XYZ? -O3 -march=XYZ ? Not necessarily, To enable vectorization of floating point reductions you need to use -ffast-math or -fassociative-math as well Jan 27, 2015 · Since gcc has previously been the only non-windows build, this was equivalent to saying "do this only for gcc". (2) No-one has felt strongly enough about switching to clang to put forth the argument for switching. Clang attempts to unroll loops really, really aggressively. Any help would be appreciated. If there are other dependencies of the project that rely on libstdc++ runtime that have to play together, Msys2 MinGW Clang is probably the way to go, but otherwise, it seems that Msys2 Clang with libc++ could be the way to go. May 17, 2016 · gcc and clang agree on evaluating the static_assert. On Linux, GCC. Feb 16, 2012 · Clang is fairly strictly conforming to the two-phase name lookup. Both are supporting all platforms and the newest instruction set extensions. 2 and Clang 3. GCC supports plugins, but its architecture makes it harder to extend compared to Clang’s more flexible design. Jul 21, 2016 · The Clang docs discuss the unwanted MS behavior, but they don't say how to stop it: For compatibility with existing code that compiles with MSVC, clang defines the _MSC_VER and _MSC_FULL_VER macros. Clang vs GCC vs MSVC - which one is correct? - Clang - missing C++20 - feature - lambda expression in an unevaluated operand - GCC: error: types may not be defined in 'decltype' expressions - MSVC: okay Modules support is pretty buggy in clang and gcc (I haven't tried msvc modules). exe互換の実行ファイル（clang-cl. I timed the FFT function. to list clang’s pre-defined macros: clang -x c /dev/null -dM -E; to list gcc’s pre-defined macros: gcc -x c /dev/null -dM -E (not that on mac gcc is actually clang that ships with XCode) the -x c /dev/null -dM -E also works for mingw (which is based on gcc) listing predefined macros for other compilers Dec 28, 2023 · GCC 13 vs. Mar 20, 2014 · There won't be any perfect equivalent, VS emits some nonsensical warnings that would never be accepted in gcc. The main issue is that in C++, each compiler has its own name mangling (or more generally ABI) and its own Standard library. Relatively of course. GCC 13 Compiler Performance On Intel Raptor Lake For those wondering how the recent releases of the Clang 16 and GCC 13 are competing for the fastest generated binaries of these leading open-source compilers, here is a fresh round of benchmarks from an Intel Core i9 13900K &quot;Raptor Lake&quot; May 23, 2022 · I am no see any advantage current to keep use msvc inside visual studio, it seem me clang is the superior do in all way. For two reasons. With clang you could try -Weverything. 1 are pretty close, and GCC has a slight edge (3. It's worth noting that the MSVC libstd headers don't always play nice with Clang due to mainly being targeted at the MSVC compiler. GCC is nearly standard in Linux world, and it adds a lot of non-standard features which are widely used in Linux software. 3 comparison appended below. The example and explanation are given in the standard [basic. It's very good to be able to compile under mutiple compilers - it makes your code very standards compliant. But now it means "do this only for gcc and clang". Mar 7, 2017 · Microsoft Visual Studio 2017 supports several C++ compilers to suit a wide variety of codebases. 2 says that we copy-initialize each element of m_a from an empty initializer list, i. The most important reason people chose Microsoft Visual C++ is: Jan 31, 2015 · All standard libraries use compiler-specific extensions to work. It's hard to say why one compiler would be better than the others. MSVC 2015 on the other hand ignores the static_assert. , plus MSVC tends to work better in the VS debugger (clang-cl often says "symbol was optimized out" even in -O0 debug build). 0. We release to customers using MSVC (Windows) and gcc (linux), but also use clang-tidy for static code analysis, which means that the code needs to compile under clang too. Visual Studio detects that you're using the Clang compiler and provides IntelliSense, highlighting, navigation, and other editing features. The two build for different C language implementations, which in this context means standard libraries, header and library search paths, and tools (especially linker). In my test, I get a 40% speedup with ClangCL. 29 calls the templated constructor. Try passing flags to MSVC to change EBCO behaviour see here for a writeup, maybe it can be made to give the 0 1 5 version. 0, and, via the Compiler Explorer, MSVC 2017 19. I originally created Asteroids for Windows using Visual Studio 2017 Community Edition. For my raytracer, GCC was definitely better than clang and MSVC (GCC code was about 10% faster). The native clang uses the MSVC linker. Here's a simplified version of the code: Clang tries really hard to be a drop-in replacement for gcc. May 4, 2012 · A is 16byte aligned making it 0x20(32) B is also 16 byte aligned, but is either also 0x20(32) on GCC but on msvc it is 0x30(48) is there a way to force the msvc to pack the data like GCC is? Reason for this: I create data and load it directly into the classes on different platforms. qpw iole tswa rpay fik doxjwnc htpm kegtn jzif xlret