maintainer-feedback requested: [Bug 228673] [PATCH] graphics/mesa-dri - configure script fails with BSD grep

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Bug 228673: [PATCH] graphics/mesa-dri - configure script fails with BSD grep
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228673



--- Description ---
The configure script uses a non-standard syntax not supported by the BSD grep
in -CURRENT. This is easily fixed by use of grep -E or egrep (see attached
patch, which makes configure work with ancient and current GNU grep and BSD
grep).

The problematic command is:

echo $platforms | grep -q "x11\|drm"

The standard compliant form that does not depend on GNU grep is:

echo $platforms | egrep -q "x11|drm"