(CXX): Move definition, change from g++ to gcc.
(EXPECT, RUNTEST): Copy definitions from top level Makefile.in.
(RUNTEST_CC, RUNTEST_CFLAGS): Remove.
(RUNTEST_CXX, RUNTEST_CXXFLAGS): Remove.
(CC_FOR_TARGET, CXX_FOR_TARGET): Copy from top level Makefile.in.
(.cc.o): Comment out.
(testdir): Remove.
(site.exp): Don't create testdir or set tmpdir.
(check): Run checks even if not running native. Use CC_FOR_TARGET
instead of RUNTEST_CC, and likewise for CXX.
(cdtest targets): Comment out.
* config/solaris2.mh (HOSTING_LIBS): Only mention crtend.o once.
* cdtest-bar.cc, cdtest-foo.cc, cdtest-foo.h: Remove.
* cdtest-main.cc, cdtest.exp: Remove.
