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fixdep: Do not record dependency on the source file itself

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The dependency is already expressed by the Makefiles, storing it in the
.cmd file breaks build if a .c file is replaced by .S or vice versa,
because the .cmd file contains

foo/bar.o: foo/bar.c ...

foo/bar.c ... :

so the foo/bar.c -> foo/bar.o rule triggers even if there is no
foo/bar.c anymore.

Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Michal Marek 2011-02-17 15:13:54 +01:00
parent 0f54088aac
commit b7bd182176
1 changed files with 11 additions and 1 deletions
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12
scripts/basic/fixdep.c
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@ -315,6 +315,7 @@ static void parse_dep_file(void *map, size_t len)
char *end = m + len;
char *p;
char s[PATH_MAX];
int first;
p = strchr(m, ':');
if (!p) {
@ -327,6 +328,7 @@ static void parse_dep_file(void *map, size_t len)
clear_config();
first = 1;
while (m < end) {
while (m < end && (*m == ' ' || *m == '\\' || *m == '\n'))
m++;
@ -340,9 +342,17 @@ static void parse_dep_file(void *map, size_t len)
if (strrcmp(s, "include/generated/autoconf.h") &&
strrcmp(s, "arch/um/include/uml-config.h") &&
strrcmp(s, ".ver")) {
printf(" %s \\\n", s);
/*
* Do not output the first dependency (the
* source file), so that kbuild is not confused
* if a .c file is rewritten into .S or vice
* versa.
*/
if (!first)
printf(" %s \\\n", s);
do_config_file(s);
}
first = 0;
m = p + 1;
}
printf("\n%s: $(deps_%s)\n\n", target, target);