Failed to install libgcc9: no destroot found

[Chris Jones]

> On 27 Sep 2019, at 10:29 pm, Bill Cole <macportsusers-20171215 at billmail.scconsult.com> wrote:
> 
> On 27 Sep 2019, at 16:51, Chris Jones wrote:
> 
>>>> On 27 Sep 2019, at 9:28 pm, Vahid Askarpour <vh261281 at dal.ca> wrote:
>>> 
>>> When I upgraded to Majove and installed Xcode 11.1, I ended up with gcc-4.2.1 and libgcc in /usr/bin and /usr/lib. Before, when I had High Sierra, I was running xcrysden with no issues.
>> 
>> That makes no sense at all. MacOS does not ship gcc,
> 
> What exactly does that sentence mean?

MacOS pretends to ship gcc, but as you mail below shows these are just sym links to clang. 
Apple hasn’t shipped and OS really with gcc for some time.

Chris
> 
> On my Mojave machine:
> 
> $ /usr/bin/gcc -v
> Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
> Apple clang version 11.0.0 (clang-1100.0.33.8)
> Target: x86_64-apple-darwin18.7.0
> Thread model: posix
> InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
> 
> It's not technically The Real GCC, but it is an executable binary at /usr/bin/gcc why acts a lot like GCC 4.2.1.
> 
> Also:
> 
> $ ls -l /usr/lib/libgcc*
> lrwxr-xr-x  1 root  wheel  15 Sep 25 08:41 /usr/lib/libgcc_s.1.dylib -> libSystem.dylib
> 
> Which is profoundly "Not Really LibGCC" but it is apparently close enough.
> 
> On High Sierra:
> 
> $ /usr/bin/gcc -v
> Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
> Apple LLVM version 10.0.0 (clang-1000.11.45.5)
> Target: x86_64-apple-darwin17.7.0
> Thread model: posix
> InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
> 
> $ ls -l /usr/lib/libgcc*
> lrwxr-xr-x  1 root  wheel     17 Sep 19  2018 /usr/lib/libgcc_s.1.dylib -> libSystem.B.dylib
> lrwxr-xr-x  1 root  wheel     19 Oct 15  2018 /usr/lib/libgcc_s.10.4.dylib -> libgcc_s.10.5.dylib
> -rwxr-xr-x  1 root  wheel  30948 Oct  6  2017 /usr/lib/libgcc_s.10.5.dylib
> 
> THAT is interesting...
> 
> $ otool -L  /usr/lib/libgcc_s.10.5.dylib
> /usr/lib/libgcc_s.10.5.dylib:
>    /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 795.0.0)
> 
> Oh, OK, not really very interesting, just baroque...
> 
> (El Cap is very similar)
> 
> -- 
> Bill Cole
> bill at scconsult.com or billcole at apache.org
> (AKA @grumpybozo and many *@billmail.scconsult.com addresses)
> Not Currently Available For Hire