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Keep the riscv_add_subset to do the same thing, and use a new function, riscv_parse_add_subset, to cover most of the things when parsing, including find the default versions for extensions, and check whether the versions are valid. The version 0p0 should be an invalid version, that is the mistake I made before. This patch clarify the version rules as follows, * We accept any version of extensions set by users, except 0p0. * The non-standard x extensions must be set with versions in arch string. * If user don't set the versions, or set 0p0 for the extensions, then try to find the supported versions according to the chosen ISA spec. Otherwise, report errors rather than output 0p0 for them. Besides, we use as_bad rather than as_fatal to report more errors for assembler. bfd/ * elfxx-riscv.c (riscv_lookup_subset): Moved to front. (riscv_add_subset): Likewise. (riscv_release_subset_list): Likewise. (riscv_parse_add_subset): New function. Find and check the versions before adding them by riscv_add_subset. (riscv_parsing_subset_version): Remove use_default_version and change the version type from unsigned to int. Set the versions to RISCV_UNKNOWN_VERSION if we can not find them in the arch string. (riscv_parse_std_ext): Updated. (riscv_parse_prefixed_ext): Updated. Since we use as_bad rather than as_fatal to report more errors, return NULL string if the parsed end_of_version is NULL, too. (riscv_parse_subset): Use a new boolean, no_conflict, to report more errors when we have more than one ISA conflicts. * elfxx-riscv.h (RISCV_DONT_CARE_VERSION): Changed to RISCV_UNKNOWN_VERSION. (riscv_lookup_subset_version): Removed. (riscv_parse_subset_t): Updated. gas/ * config/tc-riscv.c (riscv_get_default_ext_version): Change the version type from unsigned to int. (riscv_set_arch): Use as_bad rather than as_fatal to report more errors. * testsuite/gas/riscv/attribute-02.d: Updated since x must be set with versions. * testsuite/gas/riscv/attribute-03.d: Likewise. * testsuite/gas/riscv/march-ok-two-nse.d: Likewise. * testsuite/gas/riscv/attribute-09.d: zicsr wasn't supported in the spec 2.2, so choose the newer spec. * testsuite/gas/riscv/march-fail-base-01.l: Updated since as_bad. * testsuite/gas/riscv/march-fail-base-02.l: Likewise. * testsuite/gas/riscv/march-fail-order-std.l: Likewise. * testsuite/gas/riscv/march-fail-order-x.l: Likewise. * testsuite/gas/riscv/march-fail-order-z.l: Likewise. * testsuite/gas/riscv/march-fail-porder.l: Likewise. * testsuite/gas/riscv/march-fail-rv32ef.l: Likewise. * testsuite/gas/riscv/march-fail-rv32id.l: Likewise. * testsuite/gas/riscv/march-fail-rv32iq.l: Likewise. * testsuite/gas/riscv/march-fail-rv64iq.l: Likewise. * testsuite/gas/riscv/march-fail-single-char.l: Likewise. * testsuite/gas/riscv/march-fail-unknown-std.l: Likewise. * testsuite/gas/riscv/march-fail-unknown.l: Likewise. * testsuite/gas/riscv/march-fail-uppercase.l: Likewise. * testsuite/gas/riscv/march-fail-version.l: Likewise. * testsuite/gas/riscv/march-fail-isa-spec.d: Likewise. * testsuite/gas/riscv/march-fail-isa-spec.l: Likewise. include/ * opcode/riscv.h (riscv_ext_version): Change the version type from unsigned to int.
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.