From 141c2c194ee12a4f61facef81238732917062e3c Mon Sep 17 00:00:00 2001
From: stefan <stefan@315a16e6-25f9-4109-90ae-ca3045a26c18>
Date: Thu, 4 Nov 2010 08:27:53 +0000
Subject: [PATCH] - add a unique build number

git-svn-id: http://svn.lfbs.rwth-aachen.de/svn/scc/trunk/MetalSVM@227 315a16e6-25f9-4109-90ae-ca3045a26c18
---
 Makefile.example |  2 +-
 kernel/main.c    | 10 +++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/Makefile.example b/Makefile.example
index 57c6cd93..c7af6950 100644
--- a/Makefile.example
+++ b/Makefile.example
@@ -19,7 +19,7 @@ export AR = ar
 export ARFLAGS = rsv
 export RM = rm -rf
 LD = ld
-LDFLAGS = -T link.ld -z max-page-size=4096
+LDFLAGS = -T link.ld -z max-page-size=4096 --defsym __BUILD_DATE=$(shell date +'%Y%m%d') --defsym __BUILD_TIME=$(shell date +'%H%M%S') --defsym __BUILD_VERSION=$(shell svnversion -cn ../ | sed -e "s/.*://" -e "s/\([0-9]*\).*/\1/" | grep "[0-9]")
 
 default:
 	for i in $(SUBDIRS); do $(MAKE) -C $$i default; done
diff --git a/kernel/main.c b/kernel/main.c
index b2069b4d..95b40101 100644
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -45,8 +45,16 @@
 #endif
 
 extern int test_init(void);
+
+/* 
+ * Note that linker symbols are not variables, they have no memory allocated for
+ * maintaining a value, rather their address is their value.
+ */
 extern const void kernel_start;
 extern const void kernel_end;
+extern char __BUILD_DATE;
+extern char __BUILD_TIME;
+extern char __BUILD_VERSION;
 
 static void list_fs(vfs_node_t* node, uint32_t depth)
 {
@@ -135,7 +143,7 @@ int main(void)
 	tid_t pc_id;
 #endif
 
-	kprintf("This is MetalSVM %s\n", METALSVM_VERSION);
+	kprintf("This is MetalSVM %s Build %u, %u, %u\n", METALSVM_VERSION, &__BUILD_VERSION, &__BUILD_DATE, &__BUILD_TIME);
 
 	system_init();
 	irq_init();