# Compiling Julia master on High Sierra

**URL:** https://discourse.julialang.org/t/compiling-julia-master-on-high-sierra/8160
**Category:** Internals & Design
**Created:** [January 4, 2018, 2:24pm UTC](https://discourse.julialang.org/t/compiling-julia-master-on-high-sierra/8160 "2018-01-04T14:24:35Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![dancasimiro](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/dancasimiro/32/92_2.png) [@dancasimiro](https://discourse.julialang.org/u/dancasimiro)
#### Post date: [January 4, 2018, 2:24pm UTC](https://discourse.julialang.org/t/compiling-julia-master-on-high-sierra/8160/1 "2018-01-04T14:24:35Z")

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I have been compiling Julia on MacOS for a couple of years now. I can no longer successfully compile on High Sierra (10.13.2) though. Compilation always fails in libuv with the following error:

```julia
$ make CC=gcc-7 CXX=g++-7
  CC src/libuv_la-threadpool.lo
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/Security.framework/Headers/AuthSession.h:32:0,
                 from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/Security.framework/Headers/Security.h:43,
                 from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks/OSServices.framework/Headers/CSIdentity.h:43,
                 from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks/OSServices.framework/Headers/OSServices.h:27,
                 from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Headers/IconsCore.h:23,
                 from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Headers/LaunchServices.h:22,
                 from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:39,
                 from /Users/daniel.casimiro/src/julia/deps/srccache/libuv-d8ab1c6a33e77bf155facb54215dd8798e13825d/src/unix/internal.h:53,
                 from /Users/daniel.casimiro/src/julia/deps/srccache/libuv-d8ab1c6a33e77bf155facb54215dd8798e13825d/src/threadpool.c:25:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/Security.framework/Headers/Authorization.h:193:7: error: variably modified 'bytes' at file scope
  char bytes[kAuthorizationExternalFormLength];
       ^ ~~~~
make[2]: *** [src/libuv_la-threadpool.lo] Error 1
make[1]: *** [scratch/libuv-d8ab1c6a33e77bf155facb54215dd8798e13825d/build-compiled] Error 2
make: *** [julia-deps] Error 2

```

Google has not been very useful. What is the trick?

I used homebrew to install gcc.

```julia
$ gcc-7 --version
gcc-7 (Homebrew GCC 7.2.0) 7.2.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

```

XCode is at Version 9.2 (9C40b).

---

<div class="post-metadata">

### Author: ![jheinen](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jheinen/32/2787_2.png) [@jheinen](https://discourse.julialang.org/u/jheinen)
#### Post date: [January 4, 2018, 3:51pm UTC](https://discourse.julialang.org/t/compiling-julia-master-on-high-sierra/8160/2 "2018-01-04T15:51:02Z")

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Why not use clang?

```
cc -v
Apple LLVM version 9.0.0 (clang-900.0.39.2)
Target: x86_64-apple-darwin17.4.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
Found CUDA installation: /usr/local/cuda, version 8.0

```

I use it every day to build the most recent 0.7-DEV Julia version …

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<div class="post-metadata">

### Author: ![ScottPJones](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/scottpjones/32/146_2.png) [@ScottPJones](https://discourse.julialang.org/u/ScottPJones)
#### Post date: [January 4, 2018, 8:20pm UTC](https://discourse.julialang.org/t/compiling-julia-master-on-high-sierra/8160/3 "2018-01-04T20:20:03Z")

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Same here, I’m also on High Sierra, and I rebuild julia 2-3 times a day 😉

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<div class="post-metadata">

### Author: ![dancasimiro](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/dancasimiro/32/92_2.png) [@dancasimiro](https://discourse.julialang.org/u/dancasimiro)
#### Post date: [January 6, 2018, 11:43pm UTC](https://discourse.julialang.org/t/compiling-julia-master-on-high-sierra/8160/4 "2018-01-06T23:43:00Z")

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It looks like clang is working. Thanks. I thought that I had to use gcc for compatibility with gfortran.