[PATCH] kbuild: fix usage with directories containing '.o'

[PATCH] kbuild: fix usage with directories containing '.o'

[Sam Ravnborg]

From: Daniel Mack <daniel@zonque.org>, me

modpost unconditionally searched for ".o" assuming this is always
the suffix of the module. This fails in two cases:
a) when building external modules where any
   directory include ".o" in the name.
   One example is a directory named: .../cvs.alsa.org/...
b) when someone names a kernel directory so it contains ".o".
   One example is drivers/scsi/aic.ok/...

case b) was triggered by renaming the directory for aic7xxx, and
modifying Makefile and Kconfig. This caused make modules to fail.

	Sam

kbuild-fix-modpost.patch:
===== scripts/modpost.c 1.19 vs edited =====
--- 1.19/scripts/modpost.c	Fri Feb 27 06:33:07 2004
+++ edited/scripts/modpost.c	Fri Mar  5 23:42:26 2004
@@ -64,17 +64,20 @@
 {
 	struct module *mod;
 	char *p;
+	size_t len;
 	
 	mod = NOFAIL(malloc(sizeof(*mod)));
 	memset(mod, 0, sizeof(*mod));
-	mod->name = NOFAIL(strdup(modname));
+	p = NOFAIL(strdup(modname));
 
-	/* strip trailing .o */
-	p = strstr(mod->name, ".o");
-	if (p)
-		*p = 0;
+	len = strlen(p);
 
+	/* strip trailing .o */
+	if (len > 2 && p[len-2] == '.' && p[len-1] == 'o')
+		p[len -2] = '\0';
+	
 	/* add to list */
+	mod->name = NOFAIL(strdup(p));	
 	mod->next = modules;
 	modules = mod;