138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/* Subroutines for the gcc driver.
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Copyright (C) 2011-2021 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#define IN_TARGET_CODE 1
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "configargs.h"
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struct vendor_cpu
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{
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const char *part_no;
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const char *arch_name;
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const char *cpu_name;
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};
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struct vendor
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{
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const char *vendor_no;
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const struct vendor_cpu *vendor_parts;
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};
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#include "arm-native.h"
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/* This will be called by the spec parser in gcc.c when it sees
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a %:local_cpu_detect(args) construct. Currently it will be called
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with either "arch", "cpu" or "tune" as argument depending on if
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-march=native, -mcpu=native or -mtune=native is to be substituted.
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It returns a string containing new command line parameters to be
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put at the place of the above two options, depending on what CPU
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this is executed. E.g. "-march=armv7-a" on a Cortex-A8 for
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-march=native. If the routine can't detect a known processor,
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the -march or -mtune option is discarded.
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ARGC and ARGV are set depending on the actual arguments given
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in the spec. */
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const char *
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host_detect_local_cpu (int argc, const char **argv)
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{
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const char *val = NULL;
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char buf[128];
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FILE *f = NULL;
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bool arch;
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const struct vendor_cpu *cpu_table = NULL;
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char *fcpu_info = NULL;
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if (argc < 1)
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goto not_found;
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arch = strcmp (argv[0], "arch") == 0;
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if (!arch && strcmp (argv[0], "cpu") != 0 && strcmp (argv[0], "tune"))
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goto not_found;
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fcpu_info = getenv ("GCC_CPUINFO");
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if (fcpu_info)
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f = fopen (fcpu_info, "r");
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else
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f = fopen ("/proc/cpuinfo", "r");
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if (f == NULL)
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goto not_found;
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while (fgets (buf, sizeof (buf), f) != NULL)
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{
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/* Find the vendor table associated with this implementer. */
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if (strncmp (buf, "CPU implementer", sizeof ("CPU implementer") - 1) == 0)
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{
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int i;
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for (i = 0; vendors_table[i].vendor_no != NULL; i++)
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if (strstr (buf, vendors_table[i].vendor_no) != NULL)
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{
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cpu_table = vendors_table[i].vendor_parts;
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break;
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}
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}
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/* Detect arch/cpu. */
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if (strncmp (buf, "CPU part", sizeof ("CPU part") - 1) == 0)
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{
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int i;
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if (cpu_table == NULL)
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goto not_found;
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for (i = 0; cpu_table[i].part_no != NULL; i++)
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if (strstr (buf, cpu_table[i].part_no) != NULL)
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{
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val = arch ? cpu_table[i].arch_name : cpu_table[i].cpu_name;
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break;
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}
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break;
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}
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}
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if (val)
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{
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fclose (f);
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return concat ("-m", argv[0], "=", val, NULL);
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}
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not_found:
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{
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unsigned int i;
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unsigned int opt;
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const char *search[] = {NULL, "arch"};
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if (f)
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fclose (f);
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search[0] = argv[0];
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for (opt = 0; opt < ARRAY_SIZE (search); opt++)
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for (i = 0; i < ARRAY_SIZE (configure_default_options); i++)
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if (strcmp (configure_default_options[i].name, search[opt]) == 0)
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return concat ("-m", search[opt], "=",
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configure_default_options[i].value, NULL);
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return NULL;
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}
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}
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