boot-2010-02-1 as the bootstrap file.  You should probably also use
the new -P option for build.sh to generate and update the po files
while building.

way when setting -DFEATURE_SSE2.

unicode-utf16-extfmt-2009-06-11.

need the -ffloat-store and -fno-strict-aliasing flags anymore.  The
Linux x87 build correctly returns -0.9258790228548379d0 for (cos (expt
2d0 120)).

o Use += to append to variables instead of setting them.
o Add common OS_SRC files.
o Move rule for building e_rem_pio2.c to here.  Add CPPFLAGS too.

Config.x86_common:
o Remove common files from OS_SRC.
o Remove rele for e_rem_pio2.c

Config.x86_darwin:
o Update to use Config.x86_common.

GNUmakefile:
o Use CPPFLAGS when building version.o

Use a new (much smaller) Config.x86_freebsd, named consistently with (some) other files.