* Makefile.in (site.exp): Add HOSTCC and HOSTCFLAGS to site.exp.
testsuite/
	* README.compat: Add RUN_ALL_COMPAT_TESTS documentation.
	* lib/compat.exp: Replace ^$tmpdir/? in testcase names with tmpdir-.
	* gcc.dg/compat/struct-layout-1.exp: New testsuite driver.
	* gcc.dg/compat/struct-layout-1_generate.c: New testcase generator.
	* gcc.dg/compat/generate-random.c: New file.
	* gcc.dg/compat/generate-random.h: Likewise.
	* gcc.dg/compat/generate-random_r.c: Likewise.
	* gcc.dg/compat/struct-layout-1.h: Likewise.
	* gcc.dg/compat/struct-layout-1_x1.h: Likewise.
	* gcc.dg/compat/struct-layout-1_x2.h: Likewise.
	* gcc.dg/compat/struct-layout-1_y1.h: Likewise.
	* gcc.dg/compat/struct-layout-1_y2.h: Likewise.
	* gcc.dg/compat/struct-layout-1_main.c: New test.
	* gcc.dg/compat/struct-layout-1_x.c: New file.
	* gcc.dg/compat/struct-layout-1_y.c: New file.
	* gcc.dg/compat/struct-layout-1_test.h: New file.

From-SVN: r85098