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Diffstat (limited to 'extra/config/util.c')
-rw-r--r--extra/config/util.c36
1 files changed, 29 insertions, 7 deletions
diff --git a/extra/config/util.c b/extra/config/util.c
index e3f28b9d5..f8e73c039 100644
--- a/extra/config/util.c
+++ b/extra/config/util.c
@@ -29,6 +29,8 @@ struct file *file_lookup(const char *name)
/* write a dependency file as used by kbuild to track dependencies */
int file_write_dep(const char *name)
{
+ struct symbol *sym, *env_sym;
+ struct expr *e;
struct file *file;
FILE *out;
@@ -45,8 +47,25 @@ int file_write_dep(const char *name)
fprintf(out, "\t%s\n", file->name);
}
fprintf(out, "\ninclude/config/auto.conf: \\\n"
- "\t$(deps_config)\n\n"
- "$(deps_config): ;\n");
+ "\t$(deps_config)\n\n");
+
+ expr_list_for_each_sym(sym_env_list, e, sym) {
+ struct property *prop;
+ const char *value;
+
+ prop = sym_get_env_prop(sym);
+ env_sym = prop_get_symbol(prop);
+ if (!env_sym)
+ continue;
+ value = getenv(env_sym->name);
+ if (!value)
+ value = "";
+ fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
+ fprintf(out, "include/config/auto.conf: FORCE\n");
+ fprintf(out, "endif\n");
+ }
+
+ fprintf(out, "\n$(deps_config): ;\n");
fclose(out);
rename("..config.tmp", name);
return 0;
@@ -84,12 +103,15 @@ void str_free(struct gstr *gs)
/* Append to growable string */
void str_append(struct gstr *gs, const char *s)
{
- size_t l = strlen(gs->s) + strlen(s) + 1;
- if (l > gs->len) {
- gs->s = realloc(gs->s, l);
- gs->len = l;
+ size_t l;
+ if (s) {
+ l = strlen(gs->s) + strlen(s) + 1;
+ if (l > gs->len) {
+ gs->s = realloc(gs->s, l);
+ gs->len = l;
+ }
+ strcat(gs->s, s);
}
- strcat(gs->s, s);
}
/* Append printf formatted string to growable string */