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209e78f57a3886d1091948c17948fcd4928c855c
- GNU sed has supported -E for a long time. In addition, `-E` has been POSIX since 2012. http://austingroupbugs.net/view.php?id=528#c1112 - readlink has been in POSIX even longer. Removal of this check breaks macOS 10.3 and lower. This is already broken in configure ``` 31 10.0*|10.1|10.1.*|10.2*|10.3*) 32 AC_MSG_ERROR([This version of Mac OS X is not supported ``` - While here, change autogen.sh to use autoreconf
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