<p>A plain ./mvm build on MacOS 10.13.4 (in any of the build.macos64x64/pharo.* directories) fails with this error:</p>
<blockquote>
<p>utils-prng.c:207:27: error: use of unknown builtin '__builtin_shuffle' [-Wimplicit-function-declaration]<br>
randdata.vb = __builtin_shuffle (randdata.vb, bswap_shufflemask);<br>
^<br>
utils-prng.c:207:25: error: assigning to 'uint8x16' (vector of 16 'uint8_t' values) from incompatible type 'int'<br>
randdata.vb = __builtin_shuffle (randdata.vb, bswap_shufflemask);<br>
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</p>
</blockquote>
<p>It's trying to build the tests for pixman. There is a patch for this bug here: <a href="https://bugs.freedesktop.org/show_bug.cgi?id=104886" rel="nofollow">https://bugs.freedesktop.org/show_bug.cgi?id=104886</a></p>
<p>But when I apply the patch, the patched utils-prng.c file gets overwritten with the old version by something in the build or configure step, so the patch disappears and the build error returns.</p>

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