* config.gcc: Reorganize --with-cpu logic. Set configure_default_options according to the default CPU, --with-cpu, --with-arch, --with-tune, --with-schedule, --with-abi, and --with-float. Check for legal values of various options. * configure.in: Define configure_default_options in configargs.h. * configure: Regenerated. * config/mips/mips.h (TARGET_DEFAULT_ARCH_P) (TARGET_DEFAULT_FLOAT_P): New macros. * gcc.c (do_option_spec): New function. (struct default_spec, option_default_specs): New. (main): Call do_option_spec. * config/alpha/alpha.h, config/arm/arm.h, config/i386/i386.h, config/mips/mips.h, config/pa/pa.h, config/rs6000/rs6000.h, config/sparc/sparc.h (OPTION_DEFAULT_SPECS): Define. * doc/install.texi: Update --with-cpu documentation. Mention --with-arch, --with-schedule, --with-tune, --with-abi, and --with-float. * doc/tm.texi (Driver): Document OPTION_DEFAULT_SPECS. From-SVN: r67457
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