This is the first time I am working on Mac and I wanted to install the latest version of Clang, so I installed Xcode 5 and Xcode command line tools.
But the Clang version I got from the Xcode (in the terminal, I typed clang --version). It gives me following output:
clang++ --version
Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
Target: x86_64-apple-darwin12.5.0
Thread model: posix
I am confused what Clang version it is. I read that the latest Clang is version 3.5. Is the one above similar? (I need complete support for C++11). What is the difference?
Apple uses its own version numbers for Clang and LLVM which correspond with the Xcode version they are bundled with.
The actual Clang version is in indicated by the (based on LLVM X.Xsvn) part. So you have version 3.3, which is the most recent official release as you can see from the LLVM website. That version implements all the major C++11 features as you can see from the C++ support status page.
Related
This gist mentions that xcode 9 published with 'Apple LLVM version 9.0.0 (clang-900.0.38)', but the last version of llvm in llvm.org is LLVM 5.0.0.
What is the relation between them?
Apple's Xcode ship with LLVM, but it is not the open source version. For example, some clang extra tool won't be installed to you Mac. So at least, Apple has modify CMakeLists.txt. You can read the CMakeLists.txt or Makefile in apple open source.
This is only a suggestion, maybe is not helpful.
Another: index.file shows Xcode LLVM 9 map to Clang/LLVM 4.0.
You can obtain the source code for the compiler shipped with Xcode from https://opensource.apple.com if you want to have the exact same version of LLVM.
My mac version is Sierra. Xcode 8.0
gcc info
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 8.0.0 (clang-800.0.42.1)
Target: x86_64-apple-darwin16.4.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
I think gcc is not problem. My project build option is -print-multi-os-directory. but my gcc unsupported... what's the problem???
thanks
on mac your GCC is Clang as you may see in output
in clang option -print-multi-os-directory is unsupported
On current trunk (line 2079)
Was marked as unsupported here
You may try to install pure gcc via brew install gcc command
Also why do you need this option? Do you have any special checks in you project ?(this option just print path )
Since you are trying to build binutils:
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob;f=bfd/configure;h=97693870c462d5e5231bd2b512a76b7c271b9133;hb=7fa393306ed8b93019d225548474c0540b8928f7#l10348
Try to figure out why you get in condition when multi-os option is used.
This happened because your compiler passed test:
I am confused by what version of gcc is installed on my Mac, which is has OS X Yosemite (10.10.5) installed on it. I also have Xcode v6.3.1 installed.
Entering the commands below reveals the following info:
gcc -v
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/c++/4.2.1
Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
Target: x86_64-apple-darwin14.5.0
Thread model: posix
clang -v
Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
Target: x86_64-apple-darwin14.5.0
Thread model: posix
which gcc
/usr/bin/gcc
which clang
/usr/bin/clang
As far as I can tell, gcc is not aliased to clang.
Can someone please enlighten me what this means?
In newer versions of XCode gcc and clang are linked to the same binary in the SDK. clang will say that it's at least gcc 4.2, this is a little weird, but works for lots of software that checks for gcc and it is compatible in general.
echristo#dzur ~> /usr/bin/clang -v
Apple LLVM version 7.3.0 (clang-703.0.31)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
echristo#dzur ~> /usr/bin/gcc -v
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/c++/4.2.1
Apple LLVM version 7.3.0 (clang-703.0.31)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
If you take a look at the directory InstalledDir you can see the programs that are actually there.
I had a similar problem, I wanted to know what version of gcc should I install on my Yosemite, since most of UNIX tools need GCC it is a vital package.
if gcc -version doesn't shows the version, it means you do not have one.
you need to install a gcc first, then check for its version! funny? but according to your Xcode command line and OS version you have not a lot of options, let the brew decide which version you should install, It also installs dependencies.
To install GCC,
install Homebrew From HomeBrew Website
Open Terminal
Run command: brew install gcc
I have installed my GCC just now, here is the snapshot, notice the dependent module names and the gcc version at the following picture, they are Yosemite tailored :
I'd like to use the -fsanitize=address features of clang.
I'm on:
OS X 10.9.1 with Xcode 5.0.2
Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
I'm running clang from the command line, and I'm getting the error:
clang: error: unsupported argument 'address' to option 'fsanitize='
I'm told this works, but searching around hasn't shown me the way; do I need to bring in a different version of clang?
Thanks!
The out-of-box version of clang on OS X does not implement support of Address Sanitizer. You will have to build your own version of clang from sources.
You need a different build of clang than the one apple gave you. The simplest way to get one (or more) is to install Homebrew http://brew.sh
and then
brew install llvm --with-asan
You could also try a prebuilt clang from http://llvm.org/releases/download.htm.
It's by no means impossible to build clang 'by hand', but last I checked it did take multiple checkouts to get the source tree. The other options should have you asaning in minutes.
I typed this in my terminal:
llvm-gcc --version
But what I have is this :
Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
Target: x86_64-apple-darwin13.0.0
Thread model: posix`
Am I not able to interpret this block of statements? or did I forget to enable something on my system?
Nothing is wrong. The situation is just a little confusing.
Apple no longer distributes GCC with Xcode. They now use Clang as the default (and only!) compiler on Mac OS X. cc, gcc, and clang (as well as the C++ variants, c++, g++, and clang++) are now all linked to run clang under current versions of Xcode.
The version of clang you're running is, per the --version output, 500.2.79.
If you want to install GCC as an alternative to clang, you can do so using a variety of methods, including one using Homebrew:
https://github.com/mxcl/homebrew/wiki/Custom-GCC-and-cross-compilers