While building of 32bit Mesa gcc doesn't specifies __SSE__ by default.
So it has to be done manually by flag '-msee'.
Additionally for autotools is missed library-dependency that causes impossibility to build
Patch series for meson and autoconf: https://patchwork.freedesktop.org/series/51585/
Seems series is not valid.
Only one patch may be used: https://patchwork.freedesktop.org/patch/259176/
It fixes error:
../../src/util/.libs/libmesautil.a(libmesautil_la-half_float.o): In function `_mesa_lroundevenf':
/home/test/Work/mesa/src/util/rounding.h:108: undefined reference to `lrintf'
collect2: error: ld returned 1 exit status
*** Bug 108610 has been marked as a duplicate of this bug. ***
Author: Sergii Romantsov <email@example.com>
Date: Thu Nov 1 13:02:43 2018 +0200
autotools: library-dependency when no sse and 32-bit