Failed to install libgcc9: no destroot found

Chris Jones jonesc at hep.phy.cam.ac.uk
Sat Sep 28 02:16:02 UTC 2019


Reinstalling the os is probably not necessary. I would start with just wiping macports and reinstalling that from scratch.

https://guide.macports.org/chunked/installing.macports.uninstalling.html

> On 28 Sep 2019, at 1:03 am, Vahid Askarpour <vh261281 at dal.ca> wrote:
> 
> ´╗┐Perhaps my best course of action is to reinstall the OS, Xcode and then MacPorts.
> 
> Thank you all for your suggestions.
> Vahid
> 
>> On Sep 27, 2019, at 6:28 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?
>> 
>> 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
> 
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