^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * "Optimize" a list of dependencies as spit out by gcc -MD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * for the kernel build
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * ===========================================================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author Kai Germaschewski
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright 2002 by Kai Germaschewski <kai.germaschewski@gmx.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * This software may be used and distributed according to the terms
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * of the GNU General Public License, incorporated herein by reference.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Introduction:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * gcc produces a very nice and correct list of dependencies which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * tells make when to remake a file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * To use this list as-is however has the drawback that virtually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * every file in the kernel includes autoconf.h.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * If the user re-runs make *config, autoconf.h will be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * regenerated. make notices that and will rebuild every file which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * includes autoconf.h, i.e. basically all files. This is extremely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * annoying if the user just changed CONFIG_HIS_DRIVER from n to m.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * So we play the same trick that "mkdep" played before. We replace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * the dependency on autoconf.h by a dependency on every config
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * option which is mentioned in any of the listed prerequisites.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * kconfig populates a tree in include/config/ with an empty file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * for each config symbol and when the configuration is updated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * the files representing changed config options are touched
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * which then let make pick up the changes and the files that use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * the config symbols are rebuilt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * So if the user changes his CONFIG_HIS_DRIVER option, only the objects
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * which depend on "include/config/his/driver.h" will be rebuilt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * so most likely only his driver ;-)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * The idea above dates, by the way, back to Michael E Chastain, AFAIK.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * So to get dependencies right, there are two issues:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * o if any of the files the compiler read changed, we need to rebuild
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * o if the command line given to the compile the file changed, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * better rebuild as well.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * The former is handled by using the -MD output, the later by saving
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * the command line used to compile the old object and comparing it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * to the one we would now use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * Again, also this idea is pretty old and has been discussed on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * kbuild-devel a long time ago. I don't have a sensibly working
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * internet connection right now, so I rather don't mention names
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * without double checking.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * This code here has been based partially based on mkdep.c, which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * says the following about its history:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * Copyright abandoned, Michael Chastain, <mailto:mec@shout.net>.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * This is a C version of syncdep.pl by Werner Almesberger.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * It is invoked as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * fixdep <depfile> <target> <cmdline>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * and will read the dependency file <depfile>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * The transformed dependency snipped is written to stdout.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * It first generates a line
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * cmd_<target> = <cmdline>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * and then basically copies the .<target>.d file to stdout, in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * process filtering out the dependency on autoconf.h and adding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * dependencies on include/config/my/option.h for every
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * CONFIG_MY_OPTION encountered in any of the prerequisites.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * We don't even try to really parse the header files, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * merely grep, i.e. if CONFIG_FOO is mentioned in a comment, it will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * be picked up as well. It's not a problem with respect to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * correctness, since that can only give too many dependencies, thus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * we cannot miss a rebuild. Since people tend to not mention totally
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * unrelated CONFIG_ options all over the place, it's not an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * efficiency problem either.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * (Note: it'd be easy to port over the complete mkdep state machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * but I don't think the added complexity is worth it)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #include <stdarg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #include <ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static void usage(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) fprintf(stderr, "Usage: fixdep <depfile> <target> <cmdline>\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * In the intended usage of this program, the stdout is redirected to .*.cmd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * files. The return value of printf() and putchar() must be checked to catch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * any error, e.g. "No space left on device".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static void xprintf(const char *format, ...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) va_list ap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) va_start(ap, format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) ret = vprintf(format, ap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) perror("fixdep");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) va_end(ap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static void xputchar(int c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) ret = putchar(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (ret == EOF) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) perror("fixdep");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * Print out a dependency path from a symbol name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static void print_dep(const char *m, int slen, const char *dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) int c, prev_c = '/', i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) xprintf(" $(wildcard %s/", dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) for (i = 0; i < slen; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) c = m[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (c == '_')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) c = '/';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) c = tolower(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (c != '/' || prev_c != '/')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) xputchar(c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) prev_c = c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) xprintf(".h) \\\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct item {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct item *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) unsigned int hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) char name[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) #define HASHSZ 256
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static struct item *hashtab[HASHSZ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static unsigned int strhash(const char *str, unsigned int sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /* fnv32 hash */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) unsigned int i, hash = 2166136261U;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) for (i = 0; i < sz; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) hash = (hash ^ str[i]) * 0x01000193;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * Lookup a value in the configuration string.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static int is_defined_config(const char *name, int len, unsigned int hash)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct item *aux;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) for (aux = hashtab[hash % HASHSZ]; aux; aux = aux->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (aux->hash == hash && aux->len == len &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) memcmp(aux->name, name, len) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * Add a new value to the configuration string.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static void define_config(const char *name, int len, unsigned int hash)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct item *aux = malloc(sizeof(*aux) + len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (!aux) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) perror("fixdep:malloc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) memcpy(aux->name, name, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) aux->len = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) aux->hash = hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) aux->next = hashtab[hash % HASHSZ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) hashtab[hash % HASHSZ] = aux;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * Record the use of a CONFIG_* word.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static void use_config(const char *m, int slen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) unsigned int hash = strhash(m, slen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (is_defined_config(m, slen, hash))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) define_config(m, slen, hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) print_dep(m, slen, "include/config");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) /* test if s ends in sub */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static int str_ends_with(const char *s, int slen, const char *sub)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) int sublen = strlen(sub);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (sublen > slen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return !memcmp(s + slen - sublen, sub, sublen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static void parse_config_file(const char *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) const char *q, *r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) const char *start = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) while ((p = strstr(p, "CONFIG_"))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) if (p > start && (isalnum(p[-1]) || p[-1] == '_')) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) p += 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) p += 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) q = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) while (isalnum(*q) || *q == '_')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) q++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (str_ends_with(p, q - p, "_MODULE"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) r = q - 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) r = q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (r > p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) use_config(p, r - p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) p = q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static void *read_file(const char *filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) struct stat st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) fd = open(filename, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) fprintf(stderr, "fixdep: error opening file: ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) perror(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) exit(2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) if (fstat(fd, &st) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) fprintf(stderr, "fixdep: error fstat'ing file: ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) perror(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) exit(2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) buf = malloc(st.st_size + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (!buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) perror("fixdep: malloc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) exit(2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (read(fd, buf, st.st_size) != st.st_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) perror("fixdep: read");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) exit(2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) buf[st.st_size] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) /* Ignore certain dependencies */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) static int is_ignored_file(const char *s, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return str_ends_with(s, len, "include/generated/autoconf.h") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) str_ends_with(s, len, "include/generated/autoksyms.h");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * Important: The below generated source_foo.o and deps_foo.o variable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * assignments are parsed not only by make, but also by the rather simple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) * parser in scripts/mod/sumversion.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) static void parse_dep_file(char *m, const char *target)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) char *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) int is_last, is_target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) int saw_any_target = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) int is_first_dep = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) void *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) /* Skip any "white space" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) while (*m == ' ' || *m == '\\' || *m == '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) m++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (!*m)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) /* Find next "white space" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) p = m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) while (*p && *p != ' ' && *p != '\\' && *p != '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) p++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) is_last = (*p == '\0');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) /* Is the token we found a target name? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) is_target = (*(p-1) == ':');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) /* Don't write any target names into the dependency file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (is_target) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /* The /next/ file is the first dependency */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) is_first_dep = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) } else if (!is_ignored_file(m, p - m)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) *p = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) * Do not list the source file as dependency, so that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) * kbuild is not confused if a .c file is rewritten
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) * into .S or vice versa. Storing it in source_* is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) * needed for modpost to compute srcversions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (is_first_dep) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) * If processing the concatenation of multiple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) * dependency files, only process the first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) * target name, which will be the original
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) * source name, and ignore any other target
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) * names, which will be intermediate temporary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) * files.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (!saw_any_target) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) saw_any_target = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) xprintf("source_%s := %s\n\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) target, m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) xprintf("deps_%s := \\\n", target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) is_first_dep = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) xprintf(" %s \\\n", m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) buf = read_file(m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) parse_config_file(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) free(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (is_last)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) * Start searching for next token immediately after the first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) * "whitespace" character that follows this token.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) m = p + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if (!saw_any_target) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) fprintf(stderr, "fixdep: parse error; no targets found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) xprintf("\n%s: $(deps_%s)\n\n", target, target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) xprintf("$(deps_%s):\n", target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) int main(int argc, char *argv[])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) const char *depfile, *target, *cmdline;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) void *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) if (argc != 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) usage();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) depfile = argv[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) target = argv[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) cmdline = argv[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) xprintf("cmd_%s := %s\n\n", target, cmdline);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) buf = read_file(depfile);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) parse_dep_file(buf, target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) free(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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