configure.ac: Substitute CPU_OPT_EXT_RANDOM.
* configure.ac: Substitute CPU_OPT_EXT_RANDOM.
* configure.host: Define cpu_opt_ext_random to location of the
optimized version of <ext/random>.
* include/Makefile.am (ext_headers): Add ${ext_host_headers}.
(ext_host_headers): Define.
* include/ext/random (simd_fast_mersenne_twister_engine<>
::operator==): Don't define function here.
* include/ext/random.tcc (simd_fast_mersenne_twister_engine): Don't
define code using SSE2 here. Define generic code only if
_GLIBCXX_OPT_HAVE_RANDOM_SFMT_GEN_READ is not defined.
(simd_fast_mersenne_twister_engine<>
::operator==): Define here if
_GLIBCXX_OPT_HAVE_RANDOM_SFMT_OPERATOREQUAL is not defined.
* config/cpu/generic/opt/ext/opt_random.h: New file.
* config/cpu/i486/opt/ext/opt_random.h: New file.
* libsupc++/Makefile.in: Regenerated.
* testsuite/Makefile.in: Regenerated.
* po/Makefile.in: Regenerated.
* configure: Regenerated.
* Makefile.in: Regenerated.
* doc/Makefile.in: Regenerated.
* aclocal.m4: Regenerated.
* python/Makefile.in: Regenerated.
* include/Makefile.in: Regenerated.
* src/c++98/Makefile.in: Regenerated.
* src/c++11/Makefile.in: Regenerated.
* src/Makefile.in: Regenerated.
From-SVN: r191384