kbuild: Fix computing srcversion for modules

[mv-sheeva.git] / scripts / basic / fixdep.c

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index c9a16abacab4a40a9dc9feb75c4096efc386b35e..291228e259845aa62c15f45e43389fd7a2b4d675 100644 (file)
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -309,12 +309,18 @@ static void do_config_file(const char *filename)
        close(fd);
 }
 
+/*
+ * Important: The below generated source_foo.o and deps_foo.o variable
+ * 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)
 {
        char *m = map;
        char *end = m + len;
        char *p;
        char s[PATH_MAX];
+       int first;
 
        p = strchr(m, ':');
        if (!p) {
@@ -322,11 +328,11 @@ static void parse_dep_file(void *map, size_t len)
                exit(1);
        }
        memcpy(s, m, p-m); s[p-m] = 0;
-       printf("deps_%s := \\\n", target);
        m = p+1;
 
        clear_config();
 
+       first = 1;
        while (m < end) {
                while (m < end && (*m == ' ' || *m == '\\' || *m == '\n'))
                        m++;
@@ -340,9 +346,20 @@ 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 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 (first) {
+                               printf("source_%s := %s\n\n", target, s);
+                               printf("deps_%s := \\\n", target);
+                       } else
+                               printf("  %s \\\n", s);
                        do_config_file(s);
                }
+               first = 0;
                m = p + 1;
        }
        printf("\n%s: $(deps_%s)\n\n", target, target);