Thanks for the reference. 

I should have mentioned that I’m building with Xcode 10.1 and 
Command_Line_Tools_macOS_10.14_for_Xcode_10.1.dmg and I’m only seeing the 
symlink for libgcc_s.1.dylib@ -> libSystem.dylib, not a symlink of 
libgcc_s.10.4.dylib -> libSystem.dylib.

To verify there wasn’t a problem with installation, I reinstalled that 
cli-tools.dmg and still don’t see a symlink for libgcc_s.10.4.dylib being 
created. Examining the Command\ Line\ Tools\ \(macOS\ Mojave\ version\ 
10.14\).pkg file shows that 
exists in the package, but no other similar symlink. So I’m wondering how the 
symlink was created during your cli-tools install? Or am I not installing the 
proper cli-tools 10.1 package?

Obviously I could try manually creating such a link, although even with sudo, 
I’m being prevented from doing so by MacOS X:

sudo ln -s libgcc_s.10.4.dylib libSystem.dylib
ln: libSystem.dylib: Operation not permitted

Any insight greatly appreciated!

> On 6 Jan 2019, at 4:29 pm, Justin Hallett <> wrote:
> The link in Xcode 10.0 was missing when I updated to Xcode 10.1 and cli-tools 
> 10.1 the link was created in /usr/lib and it builds fine.
> ---
> TS

Leigh M. Smith 

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