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authorStephen Warren <swarren@nvidia.com>2012-01-10 17:27:52 -0700
committerMichal Marek <mmarek@suse.cz>2012-01-14 23:47:37 +0100
commit136ec2049fea65aed0446d04ab7cfff2ae3070f1 (patch)
tree03a8b0bc6775757b9e83cb9029a913a6e64cfdc9 /scripts/dtc
parent5bb0571bfddcdcd3fbf42a58fcce4d0b743fe62f (diff)
downloadlinux-136ec2049fea65aed0446d04ab7cfff2ae3070f1.tar.gz
dtc: Implement -d option to write out a dependency file
This will allow callers to rebuild .dtb files when any of the /include/d .dtsi files are modified, not just the top-level .dts file. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'scripts/dtc')
-rw-r--r--scripts/dtc/dtc.c21
-rw-r--r--scripts/dtc/srcpos.c4
-rw-r--r--scripts/dtc/srcpos.h1
3 files changed, 25 insertions, 1 deletions
diff --git a/scripts/dtc/dtc.c b/scripts/dtc/dtc.c
index cbc0193098e..451c92d31b1 100644
--- a/scripts/dtc/dtc.c
+++ b/scripts/dtc/dtc.c
@@ -71,6 +71,7 @@ static void __attribute__ ((noreturn)) usage(void)
fprintf(stderr, "\t\t\tasm - assembler source\n");
fprintf(stderr, "\t-V <output version>\n");
fprintf(stderr, "\t\tBlob version to produce, defaults to %d (relevant for dtb\n\t\tand asm output only)\n", DEFAULT_FDT_VERSION);
+ fprintf(stderr, "\t-d <output dependency file>\n");
fprintf(stderr, "\t-R <number>\n");
fprintf(stderr, "\t\tMake space for <number> reserve map entries (relevant for \n\t\tdtb and asm output only)\n");
fprintf(stderr, "\t-S <bytes>\n");
@@ -99,6 +100,7 @@ int main(int argc, char *argv[])
const char *inform = "dts";
const char *outform = "dts";
const char *outname = "-";
+ const char *depname = NULL;
int force = 0, check = 0, sort = 0;
const char *arg;
int opt;
@@ -111,7 +113,8 @@ int main(int argc, char *argv[])
minsize = 0;
padsize = 0;
- while ((opt = getopt(argc, argv, "hI:O:o:V:R:S:p:fcqb:vH:s")) != EOF) {
+ while ((opt = getopt(argc, argv, "hI:O:o:V:d:R:S:p:fcqb:vH:s"))
+ != EOF) {
switch (opt) {
case 'I':
inform = optarg;
@@ -125,6 +128,9 @@ int main(int argc, char *argv[])
case 'V':
outversion = strtol(optarg, NULL, 0);
break;
+ case 'd':
+ depname = optarg;
+ break;
case 'R':
reservenum = strtol(optarg, NULL, 0);
break;
@@ -188,6 +194,14 @@ int main(int argc, char *argv[])
fprintf(stderr, "DTC: %s->%s on file \"%s\"\n",
inform, outform, arg);
+ if (depname) {
+ depfile = fopen(depname, "w");
+ if (!depfile)
+ die("Couldn't open dependency file %s: %s\n", depname,
+ strerror(errno));
+ fprintf(depfile, "%s:", outname);
+ }
+
if (streq(inform, "dts"))
bi = dt_from_source(arg);
else if (streq(inform, "fs"))
@@ -197,6 +211,11 @@ int main(int argc, char *argv[])
else
die("Unknown input format \"%s\"\n", inform);
+ if (depfile) {
+ fputc('\n', depfile);
+ fclose(depfile);
+ }
+
if (cmdline_boot_cpuid != -1)
bi->boot_cpuid_phys = cmdline_boot_cpuid;
diff --git a/scripts/dtc/srcpos.c b/scripts/dtc/srcpos.c
index 2dbc874288c..36a38e9f1a2 100644
--- a/scripts/dtc/srcpos.c
+++ b/scripts/dtc/srcpos.c
@@ -40,6 +40,7 @@ static char *dirname(const char *path)
return NULL;
}
+FILE *depfile; /* = NULL */
struct srcfile_state *current_srcfile; /* = NULL */
/* Detect infinite include recursion. */
@@ -67,6 +68,9 @@ FILE *srcfile_relative_open(const char *fname, char **fullnamep)
strerror(errno));
}
+ if (depfile)
+ fprintf(depfile, " %s", fullname);
+
if (fullnamep)
*fullnamep = fullname;
else
diff --git a/scripts/dtc/srcpos.h b/scripts/dtc/srcpos.h
index bd7966e56a5..ce980cafe58 100644
--- a/scripts/dtc/srcpos.h
+++ b/scripts/dtc/srcpos.h
@@ -30,6 +30,7 @@ struct srcfile_state {
struct srcfile_state *prev;
};
+extern FILE *depfile; /* = NULL */
extern struct srcfile_state *current_srcfile; /* = NULL */
FILE *srcfile_relative_open(const char *fname, char **fullnamep);