*
* So we play the same trick that "mkdep" played before. We replace
* the dependency on autoconf.h by a dependency on every config
- * option which is mentioned in any of the listed prequisites.
+ * option which is mentioned in any of the listed prerequisites.
*
* kconfig populates a tree in include/config/ with an empty file
* for each config symbol and when the configuration is updated
* the config symbols are rebuilt.
*
* So if the user changes his CONFIG_HIS_DRIVER option, only the objects
- * which depend on "include/linux/config/his/driver.h" will be rebuilt,
+ * which depend on "include/config/his/driver.h" will be rebuilt,
* so most likely only his driver ;-)
*
* The idea above dates, by the way, back to Michael E Chastain, AFAIK.
* and then basically copies the .<target>.d file to stdout, in the
* process filtering out the dependency on autoconf.h and adding
* dependencies on include/config/my/option.h for every
- * CONFIG_MY_OPTION encountered in any of the prequisites.
+ * CONFIG_MY_OPTION encountered in any of the prerequisites.
*
* It will also filter out all the dependencies on *.ver. We need
* to make sure that the generated version checksum are globally up
* to date before even starting the recursive build, so it's too late
* at this point anyway.
*
- * The algorithm to grep for "CONFIG_..." is bit unusual, but should
- * be fast ;-) We don't even try to really parse the header files, but
+ * We don't even try to really parse the header files, but
* merely grep, i.e. if CONFIG_FOO is mentioned in a comment, it will
* be picked up as well. It's not a problem with respect to
* correctness, since that can only give too many dependencies, thus
* (Note: it'd be easy to port over the complete mkdep state machine,
* but I don't think the added complexity is worth it)
*/
-/*
- * Note 2: if somebody writes HELLO_CONFIG_BOOM in a file, it will depend onto
- * CONFIG_BOOM. This could seem a bug (not too hard to fix), but please do not
- * fix it! Some UserModeLinux files (look at arch/um/) call CONFIG_BOOM as
- * UML_CONFIG_BOOM, to avoid conflicts with /usr/include/linux/autoconf.h,
- * through arch/um/include/uml-config.h; this fixdep "bug" makes sure that
- * those files will have correct dependencies.
- */
#include <sys/types.h>
#include <sys/stat.h>
-#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
-#include <limits.h>
#include <ctype.h>
-#include <arpa/inet.h>
-
-#define INT_CONF ntohl(0x434f4e46)
-#define INT_ONFI ntohl(0x4f4e4649)
-#define INT_NFIG ntohl(0x4e464947)
-#define INT_FIG_ ntohl(0x4649475f)
-char *target;
-char *depfile;
-char *cmdline;
int is_spl_build = 0; /* hack for U-Boot */
static void usage(void)
{
- fprintf(stderr, "Usage: fixdep <depfile> <target> <cmdline>\n");
+ fprintf(stderr, "Usage: fixdep [-e] <depfile> <target> <cmdline>\n");
+ fprintf(stderr, " -e insert extra dependencies given on stdin\n");
exit(1);
}
/*
- * Print out the commandline prefixed with cmd_<target filename> :=
+ * Print out a dependency path from a symbol name
*/
-static void print_cmdline(void)
+static void print_dep(const char *m, int slen, const char *dir)
{
- printf("cmd_%s := %s\n\n", target, cmdline);
+ int c, i;
+
+ printf(" $(wildcard %s/", dir);
+ for (i = 0; i < slen; i++) {
+ c = m[i];
+ if (c == '_')
+ c = '/';
+ else
+ c = tolower(c);
+ putchar(c);
+ }
+ printf(".h) \\\n");
+}
+
+static void do_extra_deps(void)
+{
+ char buf[80];
+
+ while (fgets(buf, sizeof(buf), stdin)) {
+ int len = strlen(buf);
+
+ if (len < 2 || buf[len - 1] != '\n') {
+ fprintf(stderr, "fixdep: bad data on stdin\n");
+ exit(1);
+ }
+ print_dep(buf, len - 1, "include/ksym");
+ }
}
struct item {
static void use_config(const char *m, int slen)
{
unsigned int hash = strhash(m, slen);
- int c, i;
if (is_defined_config(m, slen, hash))
return;
define_config(m, slen, hash);
+ print_dep(m, slen, "include/config");
+}
- printf(" $(wildcard include/config/");
- for (i = 0; i < slen; i++) {
- c = m[i];
- if (c == '_')
- c = '/';
- else
- c = tolower(c);
- putchar(c);
- }
- printf(".h) \\\n");
+/* test if s ends in sub */
+static int str_ends_with(const char *s, int slen, const char *sub)
+{
+ int sublen = strlen(sub);
+
+ if (sublen > slen)
+ return 0;
+
+ return !memcmp(s + slen - sublen, sub, sublen);
}
-static void parse_config_file(const char *map, size_t len)
+static void parse_config_file(const char *p)
{
- const int *end = (const int *) (map + len);
- /* start at +1, so that p can never be < map */
- const int *m = (const int *) map + 1;
- const char *p, *q;
+ const char *q, *r;
+ const char *start = p;
char tmp_buf[256] = "SPL_"; /* hack for U-Boot */
- for (; m < end; m++) {
- if (*m == INT_CONF) { p = (char *) m ; goto conf; }
- if (*m == INT_ONFI) { p = (char *) m-1; goto conf; }
- if (*m == INT_NFIG) { p = (char *) m-2; goto conf; }
- if (*m == INT_FIG_) { p = (char *) m-3; goto conf; }
- continue;
- conf:
- if (p > map + len - 7)
- continue;
- if (memcmp(p, "CONFIG_", 7))
+ while ((p = strstr(p, "CONFIG_"))) {
+ if (p > start && (isalnum(p[-1]) || p[-1] == '_')) {
+ p += 7;
continue;
- p += 7;
- for (q = p; q < map + len; q++) {
- if (!(isalnum(*q) || *q == '_'))
- goto found;
}
- continue;
-
- found:
- if (!memcmp(q - 7, "_MODULE", 7))
- q -= 7;
- if (q - p < 0)
- continue;
-
+ p += 7;
+ q = p;
+ while (*q && (isalnum(*q) || *q == '_'))
+ q++;
+ if (str_ends_with(p, q - p, "_MODULE"))
+ r = q - 7;
+ else
+ r = q;
/*
* U-Boot also handles
* CONFIG_IS_ENABLED(...)
(q - p == 9 && !memcmp(p, "IS_MODULE(", 10)) ||
(q - p == 3 && !memcmp(p, "VAL(", 4))) {
p = q + 1;
- for (q = p; q < map + len; q++)
- if (!(isalnum(*q) || *q == '_'))
- goto found2;
- continue;
-
- found2:
- if (is_spl_build) {
- memcpy(tmp_buf + 4, p, q - p);
- q = tmp_buf + 4 + (q - p);
+ while (isalnum(*q) || *q == '_')
+ q++;
+ r = q;
+ if (r > p && is_spl_build) {
+ memcpy(tmp_buf + 4, p, r - p);
+ r = tmp_buf + 4 + (r - p);
p = tmp_buf;
}
}
/* end U-Boot hack */
- use_config(p, q - p);
+ if (r > p)
+ use_config(p, r - p);
+ p = q;
}
}
-/* test is s ends in sub */
-static int strrcmp(char *s, char *sub)
-{
- int slen = strlen(s);
- int sublen = strlen(sub);
-
- if (sublen > slen)
- return 1;
-
- return memcmp(s + slen - sublen, sub, sublen);
-}
-
-static void do_config_file(const char *filename)
+static void *read_file(const char *filename)
{
struct stat st;
int fd;
- void *map;
+ char *buf;
fd = open(filename, O_RDONLY);
if (fd < 0) {
- fprintf(stderr, "fixdep: error opening config file: ");
+ fprintf(stderr, "fixdep: error opening file: ");
perror(filename);
exit(2);
}
if (fstat(fd, &st) < 0) {
- fprintf(stderr, "fixdep: error fstat'ing config file: ");
+ fprintf(stderr, "fixdep: error fstat'ing file: ");
perror(filename);
exit(2);
}
- if (st.st_size == 0) {
- close(fd);
- return;
+ buf = malloc(st.st_size + 1);
+ if (!buf) {
+ perror("fixdep: malloc");
+ exit(2);
}
- map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
- if ((long) map == -1) {
- perror("fixdep: mmap");
- close(fd);
- return;
+ if (read(fd, buf, st.st_size) != st.st_size) {
+ perror("fixdep: read");
+ exit(2);
}
+ buf[st.st_size] = '\0';
+ close(fd);
- parse_config_file(map, st.st_size);
-
- munmap(map, st.st_size);
+ return buf;
+}
- close(fd);
+/* Ignore certain dependencies */
+static int is_ignored_file(const char *s, int len)
+{
+ return str_ends_with(s, len, "include/generated/autoconf.h") ||
+ str_ends_with(s, len, "include/generated/autoksyms.h") ||
+ str_ends_with(s, len, ".ver");
}
/*
* assignments are parsed not only by make, but also by the rather simple
* parser in scripts/mod/sumversion.c.
*/
-static void parse_dep_file(void *map, size_t len)
+static void parse_dep_file(char *m, const char *target, int insert_extra_deps)
{
- char *m = map;
- char *end = m + len;
char *p;
- char s[PATH_MAX];
- int is_target;
+ int is_last, is_target;
int saw_any_target = 0;
int is_first_dep = 0;
+ void *buf;
- while (m < end) {
+ while (1) {
/* Skip any "white space" */
- while (m < end && (*m == ' ' || *m == '\\' || *m == '\n'))
+ while (*m == ' ' || *m == '\\' || *m == '\n')
m++;
+
+ if (!*m)
+ break;
+
/* Find next "white space" */
p = m;
- while (p < end && *p != ' ' && *p != '\\' && *p != '\n')
+ while (*p && *p != ' ' && *p != '\\' && *p != '\n')
p++;
+ is_last = (*p == '\0');
/* Is the token we found a target name? */
is_target = (*(p-1) == ':');
/* Don't write any target names into the dependency file */
if (is_target) {
/* The /next/ file is the first dependency */
is_first_dep = 1;
- } else {
- /* Save this token/filename */
- memcpy(s, m, p-m);
- s[p - m] = 0;
-
- /* Ignore certain dependencies */
- if (strrcmp(s, "include/generated/autoconf.h") &&
- strrcmp(s, "arch/um/include/uml-config.h") &&
- strrcmp(s, "include/linux/kconfig.h") &&
- strrcmp(s, ".ver")) {
+ } else if (!is_ignored_file(m, p - m)) {
+ *p = '\0';
+
+ /*
+ * Do not list the source file as dependency, so that
+ * kbuild is not confused if a .c file is rewritten
+ * into .S or vice versa. Storing it in source_* is
+ * needed for modpost to compute srcversions.
+ */
+ if (is_first_dep) {
/*
- * Do not list the source file as dependency,
- * so that kbuild is not confused if a .c file
- * is rewritten into .S or vice versa. Storing
- * it in source_* is needed for modpost to
- * compute srcversions.
+ * If processing the concatenation of multiple
+ * dependency files, only process the first
+ * target name, which will be the original
+ * source name, and ignore any other target
+ * names, which will be intermediate temporary
+ * files.
*/
- if (is_first_dep) {
- /*
- * If processing the concatenation of
- * multiple dependency files, only
- * process the first target name, which
- * will be the original source name,
- * and ignore any other target names,
- * which will be intermediate temporary
- * files.
- */
- if (!saw_any_target) {
- saw_any_target = 1;
- printf("source_%s := %s\n\n",
- target, s);
- printf("deps_%s := \\\n",
- target);
- }
- is_first_dep = 0;
- } else
- printf(" %s \\\n", s);
- do_config_file(s);
+ if (!saw_any_target) {
+ saw_any_target = 1;
+ printf("source_%s := %s\n\n",
+ target, m);
+ printf("deps_%s := \\\n", target);
+ }
+ is_first_dep = 0;
+ } else {
+ printf(" %s \\\n", m);
}
+
+ buf = read_file(m);
+ parse_config_file(buf);
+ free(buf);
}
+
+ if (is_last)
+ break;
+
/*
* Start searching for next token immediately after the first
* "whitespace" character that follows this token.
exit(1);
}
+ if (insert_extra_deps)
+ do_extra_deps();
+
printf("\n%s: $(deps_%s)\n\n", target, target);
printf("$(deps_%s):\n", target);
}
-static void print_deps(void)
-{
- struct stat st;
- int fd;
- void *map;
-
- fd = open(depfile, O_RDONLY);
- if (fd < 0) {
- fprintf(stderr, "fixdep: error opening depfile: ");
- perror(depfile);
- exit(2);
- }
- if (fstat(fd, &st) < 0) {
- fprintf(stderr, "fixdep: error fstat'ing depfile: ");
- perror(depfile);
- exit(2);
- }
- if (st.st_size == 0) {
- fprintf(stderr,"fixdep: %s is empty\n",depfile);
- close(fd);
- return;
- }
- map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
- if ((long) map == -1) {
- perror("fixdep: mmap");
- close(fd);
- return;
- }
-
- parse_dep_file(map, st.st_size);
-
- munmap(map, st.st_size);
-
- close(fd);
-}
-
-static void traps(void)
-{
- static char test[] __attribute__((aligned(sizeof(int)))) = "CONF";
- int *p = (int *)test;
-
- if (*p != INT_CONF) {
- fprintf(stderr, "fixdep: sizeof(int) != 4 or wrong endianness? %#x\n",
- *p);
- exit(2);
- }
-}
-
int main(int argc, char *argv[])
{
- traps();
-
- if (argc != 4)
+ const char *depfile, *target, *cmdline;
+ int insert_extra_deps = 0;
+ void *buf;
+
+ if (argc == 5 && !strcmp(argv[1], "-e")) {
+ insert_extra_deps = 1;
+ argv++;
+ } else if (argc != 4)
usage();
depfile = argv[1];
if (!strncmp(target, "spl/", 4) || !strncmp(target, "tpl/", 4))
is_spl_build = 1;
- print_cmdline();
- print_deps();
+ printf("cmd_%s := %s\n\n", target, cmdline);
+
+ buf = read_file(depfile);
+ parse_dep_file(buf, target, insert_extra_deps);
+ free(buf);
return 0;
}
projects / u-boot.git / commitdiff
