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After updating Xcode Version to 10.0 beta start getting "ld: library not found for -lstdc++.6" error. same code working fine in Xcode 9.2
Also updated macOS to 10.13.5
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Just mount your root filesystem (which you can usually do with one click in the file browser, though you can use the mount command if you like). Then, in a terminal, use the mv or cp command to restore libc.
The libc. so. 6 file is present in the libc6 package.
As for the location, it's almost certainly going to be in /usr/lib/libc. a and / or /usr/lib/libc.so .
so. 6 cannot be located. This happens even when the libstdc++ is installed and the file is available in /usr/local/lib/libstdc++.so. By default, the ds_agent looks for the required library in the /opt/ds_agent/lib folder.
You'll have this issue when targeting iOS App. It's stated in the Release note:
Deprecation Notices:
Building with libstdc++ was deprecated with Xcode 8 and is not supported in Xcode 10 when targeting iOS. C++ projects must now migrate to libc++ and are recommended to set a deployment target of iOS 7 or later. Besides changing the C++ Standard Library build setting, developers should audit hard-coded linker flags and target dependencies to remove references to libstdc++ (including -lstdc++, -lstdc++.6.0.9, libstdc++.6.0.9.tbd, and libstdc++.6.0.9.dylib). Project dependencies such as static archives that were built against libstdc++ will also need to be rebuilt against libc++. (40885260)
Source: Release Notes of XCode Beta 2
Side Note:
You need to be logged to access the page.
Link might break in next beta release (URLs change), but it's in the part Developers/Download
XCode 10 being officially released with its release note, it's still as such:
Building with libstdc++ was deprecated with Xcode 8 and is not supported in Xcode 10 when targeting iOS. C++ projects must now migrate to libc++ and are recommended to set a deployment target of macOS 10.9 or later, or iOS 7 or later. Besides changing the C++ Standard Library build setting, developers should audit hard-coded linker flags and target dependencies to remove references to libstdc++ (including -lstdc++, -lstdc++.6.0.9, libstdc++.6.0.9.tbd, and libstdc++.6.0.9.dylib). Project dependencies such as static archives that were built against libstdc++ will also need to be rebuilt against libc++. (40885260)
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The quick solution is to copy all libstdc++.* file from old Xcode(9.4) to new Xcode(10.x)
For device :
cp /Applications/Xcode9.4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/libstdc++.* /Applications/Xcode10.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/
For Simulator :
cp /Applications/Xcode9.4.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/libstdc++.* /Applications/Xcode10.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/
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