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Subversion Repositories openrisc_2011-10-31
[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [optc-gen.awk] - Rev 157
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# Copyright (C) 2003,2004, 2007 Free Software Foundation, Inc. # Contributed by Kelley Cook, June 2004. # Original code from Neil Booth, May 2003. # # This program is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by the # Free Software Foundation; either version 3, or (at your option) any # later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; see the file COPYING3. If not see # <http://www.gnu.org/licenses/>. # This Awk script reads in the option records generated from # opt-gather.awk, combines the flags of duplicat options and generates a # C file. # # This program uses functions from opt-functions.awk # # Usage: awk -f opt-functions.awk -f optc-gen.awk \ # [-v header_name=header.h] < inputfile > options.c BEGIN { n_opts = 0 n_langs = 0 quote = "\042" comma = "," FS=SUBSEP # Default the name of header created from opth-gen.awk to options.h if (header_name == "") header_name="options.h" } # Collect the text and flags of each option into an array { if ($1 == "Language") { langs[n_langs] = $2 n_langs++; } else { name = opt_args("Mask", $1) if (name == "") { opts[n_opts] = $1 flags[n_opts] = $2 help[n_opts] = $3 n_opts++; } } } # Dump that array of options into a C file. END { print "/* This file is auto-generated by opts.sh. */" print "" n_headers = split(header_name, headers, " ") for (i = 1; i <= n_headers; i++) print "#include " quote headers[i] quote print "#include " quote "opts.h" quote print "#include " quote "intl.h" quote print "" print "#ifdef GCC_DRIVER" print "int target_flags;" print "#endif /* GCC_DRIVER */" print "" for (i = 0; i < n_opts; i++) { name = var_name(flags[i]); if (name == "") continue; if (flag_set_p("VarExists", flags[i])) { # Need it for the gcc driver. if (name in var_seen) continue; init = "" gcc_driver = 1 } else { init = opt_args("Init", flags[i]) if (init != "") init = " = " init; else if (name in var_seen) continue; gcc_driver = 0 } if (gcc_driver == 1) print "#ifdef GCC_DRIVER" print "/* Set by -" opts[i] "." print " " help[i] " */" print var_type(flags[i]) name init ";" if (gcc_driver == 1) print "#endif /* GCC_DRIVER */" print "" var_seen[name] = 1; } print "" print "/* Local state variables. */" for (i = 0; i < n_opts; i++) { name = static_var(opts[i], flags[i]); if (name != "") print "static " var_type(flags[i]) name ";" } print "" print "const char * const lang_names[] =\n{" for (i = 0; i < n_langs; i++) { macros[i] = "CL_" langs[i] gsub( "[^A-Za-z0-9_]", "X", macros[i] ) s = substr(" ", length (macros[i])) print " " quote langs[i] quote "," } print " 0\n};\n" print "const unsigned int cl_options_count = N_OPTS;\n" print "const struct cl_option cl_options[] =\n{" j = 0 for (i = 0; i < n_opts; i++) { back_chain[i] = "N_OPTS"; indices[opts[i]] = j; # Combine the flags of identical switches. Switches # appear many times if they are handled by many front # ends, for example. while( i + 1 != n_opts && opts[i] == opts[i + 1] ) { flags[i + 1] = flags[i] " " flags[i + 1]; i++; back_chain[i] = "N_OPTS"; indices[opts[i]] = j; } j++; } for (i = 0; i < n_opts; i++) { # Combine the flags of identical switches. Switches # appear many times if they are handled by many front # ends, for example. while( i + 1 != n_opts && opts[i] == opts[i + 1] ) { flags[i + 1] = flags[i] " " flags[i + 1]; i++; } len = length (opts[i]); enum = "OPT_" opts[i] if (opts[i] == "finline-limit=") enum = enum "eq" gsub ("[^A-Za-z0-9]", "_", enum) # If this switch takes joined arguments, back-chain all # subsequent switches to it for which it is a prefix. If # a later switch S is a longer prefix of a switch T, T # will be back-chained to S in a later iteration of this # for() loop, which is what we want. if (flag_set_p("Joined.*", flags[i])) { for (j = i + 1; j < n_opts; j++) { if (substr (opts[j], 1, len) != opts[i]) break; back_chain[j] = enum; } } s = substr(" ", length (opts[i])) if (i + 1 == n_opts) comma = "" if (help[i] == "") hlp = "0" else hlp = quote help[i] quote; neg = opt_args("Negative", flags[i]); if (neg != "") idx = indices[neg] else { if (flag_set_p("RejectNegative", flags[i])) idx = -1; else { if (opts[i] ~ "^[Wfm]") idx = indices[opts[i]]; else idx = -1; } } printf(" { %c-%s%c,\n %s,\n %s, %u, %d,\n", quote, opts[i], quote, hlp, back_chain[i], len, idx) condition = opt_args("Condition", flags[i]) cl_flags = switch_flags(flags[i]) if (condition != "") printf("#if %s\n" \ " %s,\n" \ "#else\n" \ " CL_DISABLED,\n" \ "#endif\n", condition, cl_flags, cl_flags) else printf(" %s,\n", cl_flags) printf(" %s, %s }%s\n", var_ref(opts[i], flags[i]), var_set(flags[i]), comma) } print "};" }
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