온누리070 플레이스토어 다운로드
    acrobits softphone
     온누리 070 카카오 프러스 친구추가온누리 070 카카오 프러스 친구추가친추
     카카오톡 채팅 상담 카카오톡 채팅 상담카톡
     라인으로 공유



    before pay call 0088 from app
■ 해외 로잉 무료 스마트폰 휴대폰 070 인터넷폰 인터넷전화 국내 해외 가입 상사 주재원 교민 유학생 여행 등 ■

Which is better, GCC or Clang?

  • GCC supports languages that clang does not aim to, such as Java, Ada, FORTRAN, Go, etc.
  • GCC supports more targets than LLVM.
  • GCC supports many language extensions, some of which are not implemented by Clang. For instance, in C mode, GCC supports nested functions and has an extension allowing VLAs in structs.

Pro's of clang vs GCC:

  • The Clang ASTs and design are intended to be easily understandableby anyone who is familiar with the languages involved and who has a basic understanding of how a compiler works. GCC has a very old codebase which presents a steep learning curve to new developers.
  • Clang is designed as an API from its inception, allowing it to be reused by source analysis tools, refactoring, IDEs (etc) as well as for code generation. GCC is built as a monolithic static compiler, which makes it extremely difficult to use as an API and integrate into other tools. Further, its historic design and current policy makes it difficult to decouple the front-end from the rest of the compiler.
  • Various GCC design decisions make it very difficult to reuse: its build system is difficult to modify, you can't link multiple targets into one binary, you can't link multiple front-ends into one binary, it uses a custom garbage collector, uses global variables extensively, is not reentrant or multi-threadable, etc. Clang has none of these problems.
  • Clang does not implicitly simplify code as it parses it like GCC does. Doing so causes many problems for source analysis tools: as one simple example, if you write "x-x" in your source code, the GCC AST will contain "0", with no mention of 'x'. This is extremely bad for a refactoring tool that wants to rename 'x'.
  • Clang can serialize its AST out to disk and read it back into another program, which is useful for whole program analysis. GCC does not have this. GCC's PCH mechanism (which is just a dump of the compiler memory image) is related, but is architecturally only able to read the dump back into the exact same executable as the one that produced it (it is not a structured format).
  • Clang is much faster and uses far less memory than GCC.
  • Clang has been designed from the start to provide extremely clear and concise diagnostics (error and warning messages), and includes support for expressive diagnostics. Modern versions of GCC have made significant advances in this area, incorporating various Clang features such as preserving typedefs in diagnostics and showing macro expansions, but GCC is still catching up.
  • GCC is licensed under the GPL license. clang uses a BSD license,which allows it to be embedded in software that is not GPL-licensed.
  • Clang inherits a number of features from its use of LLVM as a backend, including support for a bytecode representation for intermediate code, pluggable optimizers, link-time optimization support, Just-In-Time compilation, ability to link in multiple code generators, etc.
  • Clang's support for C++ is more compliant than GCC's in many ways.
  • Clang supports many language extensions, some of which are not implemented by GCC. For instance, Clang provides attributes for checking thread safety and extended vector types.

So, As a final thought, I think clang is better. Clang is backed by Google, Apple and Microsoft too. Latest version of clang is 5.0 and Clang AST is more advanced used by professional and Clang tooling is cool also. For example, Clang-format works great with vim and emacs. Clang error message and warnings is more robust than GCC. Clang has thread sanitizer, ASAN(Address sanitizer), MSAN and finally LLVM(low level virtual machine) compiler infrastructure project is really cool.

Barry Rountree

If you’re doing compiler research, LLVM/Clang is much, much easier to modify as plugins were part of the original architecture.

If you’re wanting faster binaries, there’s no substitute for trying them both and measuring the results.

Anton Carver

I assume you mean G++ (not GCC which is either the C compiler or the whole compiler system).

G++ still tends to generate slightly faster code for most cases. Clang tends to be much stricter about conformance to the standard (though G++ seems to be getting better). Clang / LLVM is generally more tool friendly, if you are interested in manipulating C++ code in a tool. GCC is GPL and Clang is BSD License.

There isn’t much in it really, they are both pretty good

조회 수 :
등록일 :
14:25:20 (*.160.88.18)
엮인글 :
게시글 주소 :
List of Articles
번호 제목 글쓴이 날짜 조회 수
110 How to install a Debian 9 (Stretch) Minimal Server 데비안 9 설치 admin 2018-06-13 104
» Which is better, GCC or Clang? admin 2018-06-13 99
108 고정ip설정, dns설정(데비안) linux 리눅스 admin 2018-06-13 126
107 [리눅스] 부팅 시 자동 실행 프로그램 등록|작성자 나눔HN admin 2018-06-01 209
106 리눅스 서버 유지보수 점검 메인터넌스 상황 파악 admin 2018-04-14 366
105 Top 20 OpenSSH Server Best Security Practices 보안 대책 실제 적용 admin 2018-04-14 358
104 Start Stop Restart Apache 2 Web Server Command Debian Ubuntu CentOS RHEL Fedora admin 2018-04-14 338
103 리눅스 한글 2014 뷰어 다운로드 - hwpviewer admin 2018-03-28 499
102 리눅스를 백업 복구 tar admin 2018-03-28 576
101 zip 압축 파일 및 텍스트 파일의 한글 깨짐 해결 방법 admin 2018-03-28 749
100 Lnux export how to admin 2017-12-17 1693
99 What's the difference between “adduser” and “useradd”? admin 2017-12-15 1723
98 useradd Command 리눅스 admin 2017-12-15 2573
97 How To Install Java with Apt-Get on Ubuntu 16.04 oracle java admin 2017-10-13 2437
96 우분투 Linux(Ubuntu)에 Java설치 및 환경 설정하는 방법 admin 2017-10-13 2469
95 우분투 다운로드 사이트 주소 ubuntu download 16.04.3 17.04 site link admin 2017-10-13 2677
94 How to install Java on linux with no Internet connectivity (using local repository) admin 2017-10-01 2477
93 윈도우 ssh 접속 프로그램 admin 2017-09-29 2795
92 openvpn Easy Windows Guide admin 2017-09-20 4423
91 OpenVPN - Getting started How-To admin 2017-09-20 3956
90 openssl 을 이용한 인증서 생성 절차를 정리한다. 개인키 CSR SSL 인증서 파일 생성 admin 2017-09-14 2919
89 How to Manually Unblock / Unban IP Address in fail2ban 차단풀기 admin 2017-09-12 3755
88 How To Protect SSH with fail2ban on Debian 7 데비안 ssh 방어 무작위 로그인 admin 2017-09-12 4906
87 SSH 무작위 로그인 시도 막기(With Fail2Ban on CentOS 6/7 + selinux) admin 2017-09-12 3126
86 리눅스 데비안 네트워크 설정 유선랜 무선랜 linux debian network setting 설정 admin 2017-09-07 5452
85 linux debian 계열 network 설정 테트워크 데비안 admin 2017-09-07 2820
84 PUTTY DOWNLOAD - FREE SSH & TELNET CLIENT admin 2017-09-03 5317
83 debian 8.8 download cd1 cd2 cd3 etc admin 2017-09-03 2895
82 Debian Download 데비안 리눅스 다운로드 admin 2017-09-02 3461
81 데비안 리눅스 부팅시에 방화벽 서버에 자동실행 되게 설정 해보자 admin 2017-08-30 2904
80 리눅스 시작시에 부팅시 프로세스 프로그램 자동 실행 설정 admin 2017-08-30 5609
79 리눅스 시작시 부팅 시, 프로그램 자동실행 등록하기 admin 2017-08-30 4469
78 리눅스 부팅시 시작시 프로그램 명령어 실행하기 (Linux Init script) admin 2017-08-30 4301
77 리눅스 부팅시 자동 실행 명령스크립트 실행하기 만들기 이해 linux booting admin 2017-08-30 5384
76 부팅시 자동실행 명령어 스크립트, rc.local admin 2017-08-30 7620
75 the world’s most widely deployed RADIUS server document admin 2017-08-29 4788
74 네트워크 디바이스명 변경 리눅스 eth0 eth1 admin 2017-08-29 5764
73 Cloned VMware CentOS6 Server "device eth0 does not seem to be present, admin 2017-08-29 3008
72 VMWARE VM Error boot loader install grub - install /dev/sda or /dev/hda MBR linux admin 2016-01-27 3629
71 Linux and Unix touch command admin 2015-11-15 4024
70 Configuration of Red Hat 5.4 Xen for SR-IOV Support admin 2015-08-02 4001
69 apt-get install linux-image-2.6.26-2-686-bigmem admin 2015-06-27 4145
68 intel i210 driver install and compile debian admin 2015-06-27 6955
67 Debian / Ubuntu Linux Install Kernel Headers Package admin 2015-06-27 4110
66 mount -t auto /dev/sdb1 /mnt && ls /mnt admin 2015-06-27 4075
65 kali linux 해킹 hacking attack DDOS etc tools admin 2015-06-24 4733
64 sources.list lenny admin 2015-02-03 4910
63 Ubuntu 14.04 원격 접속(xrdp) 설정 admin 2014-12-21 15042
62 Remote Desktop Connection from Windows 7/8 to Ubuntu 14.04 admin 2014-12-21 5520
61 Using Windows RDP to Access your Ubuntu Instance admin 2014-12-21 5203
60 Install GUI on Ubuntu Server admin 2014-12-21 5313
59 How to start GUI from command line? admin 2014-12-21 5345
58 Download all files in a directory using WGET admin 2014-12-16 5440
57 문서 편집기 vi vim command 명령어 정리 admin 2014-10-29 7048
56 find 명령 사용 예제들 admin 2014-10-29 6017
55 특정 IP 엑세스 못하게 하는방법 admin 2014-10-29 6083
54 scp 명령어를 이용한 파일 복사 및 전송 admin 2014-10-29 7559
53 [리눅스] 소프트웨어 레이드의 리빌딩 및 리싱킹 속도를 높이는 5가지 방법 admin 2014-10-17 6357
52 /bin/false, /sbin/nologin 의 차이점 admin 2014-10-13 7428
51 리눅스 시스템 유저 추가 명령어 useradd 사용하기 admin 2014-08-09 6615
50 리눅스 시스템 시작시에 자동 실행할 파일 등록하기 admin 2014-03-22 34451
49 linux 에티터 명령어 정리 포그라운드 전환 : ctrl + z 다시 vi 모드로 돌아오려면 fg admin 2014-03-05 11027
48 Linux Memory Management – Virtual Memory and Demand Paging admin 2014-03-03 8207
47 iptables rules tcp drop all port except tcp 22 admin 2014-02-26 9640
46 seagate HD 시게이트 하드 디스크 A/S 에이에스 기간 조회 및 받는 3가지 방법 admin 2013-12-09 10291
45 SSH Without Authentication Using Key Files (CentOS 5.6) admin 2013-11-22 8985
44 Getting started with SSH public key cryptography admin 2013-09-05 15946
43 암호 없이 SSH 접속하기 admin 2013-09-05 9563
42 Linux Date Command Examples to Display and Set System Date Time admin 2013-07-11 11214
41 FreeRADIUS 설치(freeradius-sever-2.1.8) admin 2013-04-19 20781
40 Radius를 이용한 ssh 인증 서버 구축하기 admin 2013-04-19 15514
39 CentOS 5.4에서 RADIUS 서버 설치하기 admin 2013-04-19 24531
38 Event IP 20187 admin 2013-04-08 9336
37 리눅스에서 자바(JDK) 설치하기 admin 2013-04-08 10444
36 리눅스 네트워크 설정 멸령어 Linux admin 2013-04-08 10671
35 [linux]리눅스 버전및 CPU등 환경정보 확인하기 admin 2013-04-08 39123
34 Linux 시스템 백업과 복원 admin 2013-04-04 10704
33 tar로 전체시스템 백업 LINUX Backup admin 2013-04-04 24610
32 다운된 리눅스서버 응급복구 admin 2013-03-28 14315
31 Build a RADIUS server on Linux admin 2013-03-23 13819
30 Deploying FreeRADIUS with the MySQL Cluster Database file admin 2013-03-22 9911
29 FREE RADIUS 활용및 응용 admin 2013-02-23 21617
28 리눅스에 RADIUS 서버 구현하기 admin 2012-09-01 49862
27 Debian CD DVD 다운로드 링크 헤메지말고 바로 다운로드하지요 admin 2012-08-18 10472
26 Site builder shootout: Drupal vs. Joomla vs. WordPress admin 2012-07-15 36158
25 WinXP 부팅안되는 현상 NTLDR is missing 메세지 admin 2012-07-12 11134
24 윈도우XP 알면 정말 편한 숨겨진 기능 60가지 admin 2012-05-11 15000
23 한국인/국내기업은 얼마나 Linux Kernel에 기여할까? admin 2012-04-29 12983
22 scp, ssh, rsync등을 사용할때에 SSH 비밀번호 묻는것 피하기 admin 2012-04-15 11864
21 [Linux/SSL] 리눅스 서버에 Apache 2 설치 및 SSL 설정하기(mod_ssl, openssl) admin 2012-04-15 12716
20 리눅스의 막강한 네트워크 필터 iptables admin 2012-04-15 11193
19 Centos net install web http admin 2012-03-02 15326
18 Linux 시스템 백업과 복원 admin 2012-02-28 12901
17 검색 파일리스트 만든 다음 여러파일 한방에 압축하기 admin 2012-02-14 12765
16 linux 파티션 디렉토리 용량 확인방법 전체 폴더 크기 사이즈 admin 2012-01-05 13188
15 How to disable IPv6 in Debian Lenny and Squeeze admin 2011-12-29 11196
14 리눅스 네트워크 설정 LINUX admin 2011-12-19 12231
13 다양한 사운드 파일있는곳 admin 2011-12-19 10267
12 모든 CPU 벤치마크 수치 admin 2011-12-16 12217
11 Wireshark admin 2011-12-16 10529