Fix #77011: configure cannot detect iconv library on Mojave (macOS 10.14) #4016
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Added ".tbd" extension support for libiconv on Mac to use CommandLineTools SDK shared library.
I know library detection code is being ported and another PR solved the same problem, but this is a simple and temporary solution which enables Mac Mojave users to keep contributing with PHP on this mean time.
I tested this patch running:
./configure --enable-debug --enable-cli --with-iconv=$(xcrun --show-sdk-path)/usr